SKYW


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents


us-gaap:DebtInstrument
us-gaap:CommonStockValue
us-gaap:StatementEquityComponents
us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CostOfGoodsAndServicesSold
us-gaap:ProductOrService
us-gaap:StatementBusinessSegments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestExpense
us-gaap:StatementBusinessSegments

us-gaap:InterestPaidNet

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic
us-gaap:StatementEquityComponents

us-gaap:NonoperatingIncomeExpense

us-gaap:OperatingIncomeLoss

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ProductOrService
us-gaap:StatementBusinessSegments
us-gaap:ProductOrService
us-gaap:Revenues

us-gaap:Assets
us-gaap:StatementBusinessSegments

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:ReceivablesNetCurrent
us-gaap:ProductOrService

us-gaap:OtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:LiabilitiesCurrent

us-gaap:LongTermDebtCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:LongTermDebt
us-gaap:DebtInstrument
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredFinanceCostsNoncurrentNet

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
us-gaap:DebtInstrument
us-gaap:CommonStockValue

us-gaap:CommonStocksIncludingAdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:DepreciationDepletionAndAmortization
us-gaap:StatementBusinessSegments

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquireProductiveAssets
us-gaap:StatementBusinessSegments

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock
us-gaap:AircraftType, us-gaap:Range
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:AircraftType, us-gaap:StatementScenario
us-gaap:DebtInstrument
us-gaap:LongtermDebtType
us-gaap:Range, us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:Range, us-gaap:DebtInstrument, us-gaap:TypeOfArrangement
us-gaap:StatementScenario, us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:StatementScenario, us-gaap:DebtInstrument, us-gaap:TypeOfArrangement
us-gaap:StatementScenario, us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

us-gaap:EffectiveIncomeTaxRateContinuingOperations
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxLiabilities

us-gaap:UnrecognizedTaxBenefits

skyw:ContractWithCustomerLiabilityAdditionsMadeDuringPeriod
us-gaap:Range
skyw:CoronavirusAidReliefAndEconomicSecurityActApproximateAmountOfSecuredLoansToAirlineIndustry

skyw:CoronavirusAidReliefAndEconomicSecurityActWarrantIssuance
us-gaap:StatementEquityComponents
us-gaap:UnusualOrInfrequentItem
skyw:DecreaseInBlockHoursPercent
us-gaap:UnusualOrInfrequentItem
skyw:DecreaseInDeparturesPercent

skyw:GrantContraExpenses
us-gaap:DebtInstrument, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement
skyw:IncreaseInDebtInstrumentFaceAmount

skyw:NetUnrealizedDepreciationMarketableSecuritiesNetOfTax
us-gaap:StatementEquityComponents
us-gaap:Range, us-gaap:StatementScenario
skyw:NumberOfDailyDepartures
us-gaap:Range, us-gaap:UnusualRiskOrUncertaintyByNature

skyw:PaymentOfDebtIssuanceAndLessorInitialDirectCosts

skyw:PaymentsForDepositsOnAircraft
us-gaap:AircraftType
skyw:PaymentsForFlightEquipmentByIssuanceOfLongTermDebt

skyw:PercentageOfAvailableSeatMilesFlownUnderFixedFeeArrangements

skyw:PercentageOfAvailableSeatMilesFlownUnderProRateArrangements

skyw:PercentageOfFlightsIncreased
us-gaap:DebtInstrument, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement
skyw:PercentageOfIncreaseInPrincipalAmount

skyw:PercentageOfReductionInCompletedBlockHoursOfFlights

skyw:PercentageOfReductionInCompletedDeparturesOfFlights

skyw:ProceedsFromReturnOfDepositsOnAircraft

skyw:SegmentProfit
us-gaap:StatementBusinessSegments

skyw:SeveranceCostsGross
us-gaap:Range, us-gaap:AwardType, us-gaap:PlanName
skyw:SharesAwardedPercentageOfOriginalGrants

skyw:TreasurySharesWithheldForPaymentOfTax
us-gaap:StatementEquityComponents

skyw:TreasurySharesWithheldForPaymentOfTaxes

skyw:VariableAndShortTermLeaseCost

skyw:WarrantsIssued

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
us-gaap:StatementScenario, us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement
us-gaap:DebtInstrumentInterestRateDuringPeriod
dei:LegalEntity, us-gaap:AircraftType, us-gaap:StatementScenario, us-gaap:TypeOfArrangement
us-gaap:Depreciation
dei:LegalEntity, us-gaap:AircraftType, us-gaap:TypeOfArrangement

us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions

us-gaap:FairValueOfAssetsAcquired
us-gaap:IncomeStatementLocation, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:IncomeLossFromEquityMethodInvestments
us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:InvestmentIncomeInterest

us-gaap:LaborAndRelatedExpense

us-gaap:LeaseCost

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseLeaseIncomeLeasePayments

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherNonoperatingIncome

us-gaap:PaymentsForFlightEquipment

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromIssuanceOfCommonStock
us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement
us-gaap:ProceedsFromIssuanceOfDebt
us-gaap:TypeOfArrangement

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProvisionForDoubtfulAccounts
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:TitleOfIndividual
us-gaap:StatementEquityComponents
us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation

us-gaap:StockAndWarrantsIssuedDuringPeriodValuePreferredStockAndWarrants
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedDuringPeriodValue

us-gaap:SubleaseIncome

us-gaap:WeightedAverageNumberOfSharesRestrictedStock
us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
dei:EntityNumberOfEmployees

skyw:AssetsNoncurrentExcludingPropertyPlantAndEquipment

skyw:BuildingsAndGroundEquipmentGross

skyw:CashAndCashEquivalentsAndAvailableForSaleSecurities

skyw:CashAndMarketableSecurities
us-gaap:FairValueByMeasurementFrequency
skyw:CashCashEquivalentsAndAvailableForSaleSecuritiesAmortizedCost
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
skyw:CashCashEquivalentsAndRestrictedCashFairValueDisclosure
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

skyw:ContractualObligationDueAfterFourthYear

skyw:DebtInstrumentCarryingAmountCurrent

skyw:DebtInstrumentCarryingAmountNoncurrent
us-gaap:TypeOfArrangement
skyw:DeferredGrantContraExpenses

skyw:FixedInterestDebtPercent

skyw:InterestCommitment

skyw:InterestCommitmentDueAfterYearFive

skyw:InterestCommitmentDueAfterYearFour

skyw:InterestCommitmentDueInNextTwelveMonths

skyw:InterestCommitmentDueInYearFive

skyw:InterestCommitmentDueInYearFour

skyw:InterestCommitmentDueInYearThree

skyw:InterestCommitmentDueInYearTwo

skyw:InterestCommitmentFutureMinimumPaymentsRemainderOfFiscalYear

skyw:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour

skyw:LettersOfCreditAndSuretyBondOutstandingAmount

skyw:LiquidAssets
us-gaap:DebtInstrument, us-gaap:UnusualOrInfrequentItem
us-gaap:LongtermDebtType, us-gaap:UnusualOrInfrequentItem

skyw:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour

skyw:LongTermReceivablesAndOtherAssets

skyw:NumberOfDailyDeparturesToDifferentDestinations

skyw:PercentageOfVariableRateNotes

us-gaap:AccountsAndOtherReceivablesNetCurrent

us-gaap:AccountsReceivableGrossCurrent
us-gaap:BalanceSheetLocation

us-gaap:AccountsReceivableGrossNoncurrent
us-gaap:BalanceSheetLocation

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent

us-gaap:AirlineRelatedInventoryNet

us-gaap:AirlineRelatedInventoryValuationReserves

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
us-gaap:ClassOfWarrantOrRight, us-gaap:TypeOfArrangement
us-gaap:DebtInstrument
us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:LongtermDebtType
us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement
us-gaap:DebtInstrument
us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
us-gaap:DebtInstrument, us-gaap:SubsequentEventType

us-gaap:ContractWithCustomerLiability
us-gaap:TypeOfArrangement

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:ContractualObligation

us-gaap:ContractualObligationDueInFifthYear

us-gaap:ContractualObligationDueInFourthYear

us-gaap:ContractualObligationDueInNextTwelveMonths

us-gaap:ContractualObligationDueInSecondYear

us-gaap:ContractualObligationDueInThirdYear

us-gaap:ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear

us-gaap:DebtInstrumentCarryingAmount
us-gaap:LongtermDebtType
us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement
us-gaap:DebtInstrumentFaceAmount
us-gaap:DebtInstrument
us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:DebtInstrument, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement
us-gaap:IncomeStatementLocation, us-gaap:TypeOfArrangement
us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement
us-gaap:ProductOrService, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement
us-gaap:ProductOrService, us-gaap:TypeOfArrangement
us-gaap:Range, us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:Range, us-gaap:DebtInstrument, us-gaap:TypeOfArrangement
us-gaap:StatementScenario, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement
us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement
us-gaap:TypeOfArrangement

us-gaap:DebtInstrumentInterestRateEffectivePercentage

us-gaap:DeferredFinanceCostsCurrentNet

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DepositsOnFlightEquipment

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:EquityMethodInvestmentOwnershipPercentage
us-gaap:BalanceSheetLocation, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:EquityMethodInvestments
us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:FlightEquipmentGross
us-gaap:TypeOfArrangement
us-gaap:GrantsReceivable

us-gaap:IncomeTaxesReceivable

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LessorOperatingLeasePaymentsToBeReceived

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFiveYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFourYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths

us-gaap:LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThreeYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedTwoYears

us-gaap:LettersOfCreditOutstandingAmount
us-gaap:ShortTermDebtType
us-gaap:LineOfCredit

us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity
us-gaap:DebtInstrument
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:LongTermDebtFairValue
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards
dei:LegalEntity, us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwardsValuationAllowance
us-gaap:Range, us-gaap:PropertyPlantAndEquipmentByType
us-gaap:PropertyPlantAndEquipmentSalvageValuePercentage

us-gaap:PurchaseObligation

us-gaap:PurchaseObligationDueInNextTwelveMonths

us-gaap:PurchaseObligationDueInSecondYear

us-gaap:PurchaseObligationFutureMinimumPaymentsRemainderOfFiscalYear
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
us-gaap:AwardType, us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange
us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
us-gaap:AwardType, us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange
us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1

us-gaap:StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased

us-gaap:StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased

us-gaap:TreasuryStockCommonValue

us-gaap:UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued
us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:ValuationAllowancesAndReservesBalance
us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:ValuationAllowancesAndReservesType
us-gaap:ValuationAllowancesAndReservesType

us-gaap:WorkersCompensationLiabilityCurrent

Plots across concepts


IncomeStatement
Comprehensive Income Net Of Tax
Expenses
Allocated Share Based Compensation Expense
Balance Sheet
Operating Lease Liability Noncurrent
Assets
Operating Lease Right Of Use Asset
Current Assets
Other Assets Current
NonCurrent Assets
Other Assets Noncurrent
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Liabilities Current
Current Liabilities
Contract With Customer Liability Current
Noncurrent Liabilities
Other Liabilities Noncurrent
Stockholders Equity
Retained Earnings Accumulated Deficit
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Net Income Loss Available To Common Stockholders Basic
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
DividendsAndRepurchase
Payments For Repurchase Of Common Stock
NonoperatingIncomeExpense
Nonoperating Income Expense
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four
AccountsReceivable
Receivables Net Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:CommonStockValue us-gaap:DebtInstrument skyw:PromissoryNoteCaresActPayrollSupportProgram█▁▆▆5.83.35.05.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock██▇▇▇▇▆▆▆▆▄▄▄▄▁82.30282.30282.09582.09582.05482.05481.74381.74381.70381.79981.23981.23981.10581.10580.398NANANA79.781NANANA79.02NANANA77.951NANANA77.326NANANANANANANANANANANANANANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding ▂▂▁▂▁▁▂▂▂▃▄▄▄▄▄▄▄▄▃▃▃▃▃▂▃▃▂▃▂▂▃▄▄▃▃▃▃▂▂▃▄▅▇███50.72550.72750.18150.62250.1450.55950.79651.12951.47752.09852.55652.98152.91353.03353.1453.0852.97753.20251.75752.47152.19452.01451.65751.28251.97152.39251.17452.03651.18351.46752.03452.6152.54752.49752.16152.15351.78950.88150.69152.31553.37153.84455.71956.80456.71856.864
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic ▁▁▁▁▁▁▁▂▂▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▃▂▂▂▃▂▃▃▃▂▂▂▂▂▃▄▅▇███50.34650.28650.18150.18150.1450.27750.39550.74651.14551.4451.6552.03952.04651.92151.81151.83351.75151.8251.75751.62751.41851.21850.8850.61651.35751.45751.17451.32251.18351.46751.22851.88151.88151.76351.29651.24150.94450.88150.69151.5752.69853.84454.74755.90155.93655.855
us-gaap:EarningsPerShareBasic ▅▅▄▅▄▅▅▆▅▅▅▅▅▅█▅▅▅▁▅▅▅▅▅▅▄▄▅▄▄▄▅▅▄▅▅▅▄▄▄▄▄▅▅▅▅1.230.71-0.930.67-0.510.61.441.81.721.711.31.61.461.055.61.040.980.67-5.220.80.780.530.80.720.610.19-0.540.81-0.29-0.440.170.510.40.060.270.410.33-0.01-0.350.00.03-0.210.680.460.330.27
us-gaap:EarningsPerShareDiluted ▅▅▄▅▄▅▅▆▆▆▅▅▅▅█▅▅▅▁▅▅▅▅▅▅▅▄▅▄▄▅▅▅▄▅▅▅▄▄▄▄▄▅▅▅▅1.220.71-0.930.66-0.510.591.431.791.711.691.281.571.431.035.461.010.950.65-5.220.790.770.520.780.710.610.18-0.540.79-0.29-0.440.170.50.390.060.270.40.33-0.01-0.350.00.03-0.210.670.450.330.26
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 COGS Ratio us-gaap:StatementBusinessSegments skyw:SkyWestAirlines▆▄▅▃▁▇███▇▇▇▇▇▆▇▆▅527.595406.45464.137337.975227.808606.842623.878641.947627.088585.768595.424607.052587.48556.294548.75558.994519.708464.916NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:StatementBusinessSegments skyw:SkywestLeasing███▇▇▇▇▇▇▇▄▄▃▂▂▂▂▁129.395128.105125.5119.518122.231123.094119.713118.348117.295113.87688.80682.06874.32866.02563.84362.31159.98553.803NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 TTM Greenblatt ROC _ _█▇▆▇▆▇███▇███▇▇█▇▇▁▇▇▇▇▇▇▇▆▇▆▆▇▇▇▆▇▇▇▆▆▆▆▆▇115.02380.842-27.66974.553-4.40366.321125.305146.441144.09396.419121.502137.925126.67888.17592.939112.369106.59676.295-404.46485.83484.13761.80952.21278.29669.93234.075-19.70259.0813.244-27.77430.8256.17450.55515.56143.7554.97446.80620.457-4.98826.82719.040.22751.835NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AllocatedShareBasedCompensationExpense █▁2.92.6NA2.12.11.7NA2.02.13.9NA2.82.74.9NANANANANA1.91.62.3NA1.11.31.5NA0.91.11.7NA1.11.11.3NA1.11.11.3NA1.21.21.8NANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▅▅▄▅▄▅▅▆▅▅▅▅▅▅█▅▅▅▁▅▅▅▅▅▅▅▄▅▄▄▄▅▅▄▅▅▅▄▄▄▄▄61.99435.9-46.4533.355-25.40829.98872.52791.33988.05288.21367.09283.04475.94354.312289.88353.72750.49434.825-270.27341.31140.45727.10740.24436.42931.2529.921-28.42839.986-14.695-22.8648.73126.82420.1573.29613.73920.64617.136-0.3-19.2890.7462.042-10.594NANANANA
us-gaap:CostOfGoodsAndServicesSold ▅▃▆▂▁▇▆▆▆▇███████▇541.967453.713617.306382.94354.442663.615618.286613.854600.29627.275681.987691.35678.837695.225678.301700.304684.916670.871NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest █▇▆▇▆▇███████▇▇██▇▁▇▇▇▇▇▇▇▆▇▆▆▇▇▇▆▇▇▇▆▆▇▆▆81.37349.988-59.37546.211-33.24239.07997.788118.738115.335114.44490.859109.92598.32767.20468.23986.67680.86352.406-426.22266.5666.33544.51465.76159.76352.54815.61-36.99842.197-2.894-43.4514.65239.17533.029-2.40425.01135.527.4190.677-25.0126.741-1.012-19.993NANANANA
us-gaap:IncomeTaxExpenseBenefit █▇▇▇▇▇███████▇▁███▃██████▇▇█▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇19.37914.088-12.92512.549-7.5279.09125.26127.39927.28326.26323.75326.87922.46812.842-221.6932.9630.38617.62-155.97725.23826.09117.42225.30723.49521.0736.63-8.64427.0069.736-20.2886.48217.97312.9922.12911.6111.98211.687-0.54-9.807-2.222-3.336-7.4714.25513.77511.985NA
us-gaap:IncomeTaxesPaidNet ▇▇▇▇▇▇▇▇▇▇▇▇▇▇█▇▇▇▇▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▆▇▆▇▇▇▁▇0.30.1571.4090.0680.1770.1260.0750.7020.061.6530.2790.531.3660.4862.6561.7560.120.4780.2680.2030.0570.6843.610.8810.040.5731.5810.103-0.0690.4511.1691.6290.4920.3880.0860.037-1.423-0.054-2.53-0.3660.2310.467-17.277-0.113NANA
us-gaap:InterestExpense █▇▇▇▇▇▇▇█▇█▇▆▅▅▅▅▄▄▃▂▂▂▃▂▂▂▁▁▁▁▂▂▂▂▂▂▃▃▃▃▃▃▃▃33.9431.35431.89330.1530.92630.20430.87131.60632.7732.50733.92431.4428.81126.23426.21227.10127.06324.54922.30119.86518.28717.72519.3919.91418.08118.46517.29816.88316.13815.67616.16816.99917.52617.96518.73919.47419.38719.7820.02520.08620.05220.2221.63421.6421.659NA
us-gaap:InterestPaidNet ▅▄▄█▁▄▄▅▅▅▅▄▄▄▄▄▄▃▃▂▂▂▃▂▃▂▃▂▃▁▃▂▃▂▃▂▃▂▃▂▃▂▄▂35.12131.64629.44154.11810.46831.41331.63332.32233.4934.28832.65730.84628.28426.48127.72426.97226.90424.03922.27518.42719.3416.54724.5418.58722.24915.28121.00613.65419.98113.12220.84413.84622.0314.60323.54915.59723.96715.29424.25115.56625.05816.31226.63616.597NANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▅▅▄▅▄▅▅▆▅▅▅▅▅▅█▅▅▅▁▅▅▅▅▅▅▄▄▅▄▄▄▅▅▄▅▅▅▄▄▄▄▄▅▅▅▅61.99435.9-46.4533.662-25.71529.98872.52791.33988.05288.18167.10583.04675.85954.362289.92853.71650.47734.786-270.24441.32240.24427.09240.45436.26831.4759.62-27.86841.338-14.737-22.8878.60926.39420.723.23313.94620.93316.96-0.682-17.9670.1161.579-11.06337.20725.47418.65515.014
us-gaap:NonoperatingIncomeExpense ▁▁▁▂▂▂▂▂▂█▁▂▂▃▂▂▂-33.65-30.854-31.706-28.342-28.839-27.242-27.517-27.703-28.75818.025-30.643-28.0-28.351-20.971-24.701-25.693-25.733NANANANANANANANA-17.825-16.8119.264-18.245-15.401-15.73-11.807-16.843-10.199-18.194-22.059-18.159-21.679-22.786-28.933-20.797-18.76-0.374-19.033-18.648NA
us-gaap:OperatingIncomeLoss █▇▆▇▆▇███▇███▇▇█▇▇▁▇▇▇▇▇▇▇▆▇▆▆▇▇▇▆▇▇▇▆▆▆▆▆▇▇▇▇115.02380.842-27.66974.553-4.40366.321125.305146.441144.09396.419121.502137.925126.67888.17592.939112.369106.59676.295-404.46485.83484.13761.80952.21278.29669.93234.075-19.70259.0813.244-27.77430.8256.17450.55515.56143.7554.97446.80620.457-4.98826.82719.040.22751.83558.28249.28842.421
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax ▅▃▄▂▁▅▆▆▆▅▆▇▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▇▆▆▆▇▇▆▆▇██▇██▇▆▅▄▄656.99534.555589.638457.493350.039729.936743.591760.295744.383723.694803.489829.275805.515783.4771.241812.673791.512747.166758.017799.776801.338762.075752.744794.004788.417760.398813.854834.633816.574772.386804.368850.74839.13803.487810.726865.259937.214921.173899.85955.425933.697865.951796.285686.858649.759632.243
 us-gaap:Revenues us-gaap:ProductOrService skyw:AircraftLeasesNANANA208.516168.103NANA207.467206.678NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ProductOrService skyw:AircraftOperationsNANANA175.753132.061NANA385.537383.732NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ProductOrService skyw:AirportCustomerServiceAndOtherNANANA5.3094.18420.44246.61211.38210.03223.69311.62813.21811.87815.43610.16211.7089.78812.637NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ProductOrService skyw:FlyingAgreementsNANANA445.048336.37NA725.092738.838725.335NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ProductOrService skyw:LeaseAirportServiceAndOtherNANANA12.44513.669NANA21.45719.048NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ProductOrService skyw:ProrateAgreementsNANANA60.77936.206NANA145.834134.925NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets ███▇▇▇▇▇▇▇▆▆▅▅▄▄▄▃▃▄▃▃▃▃▃▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂6991.7636894.6856887.6226758.5946773.3836661.4116657.1296597.6596580.0196544.5326313.2126184.865913.0935600.1875458.2795389.4465360.6135128.3565137.2515299.7644996.8854813.0584802.8864926.4434838.5544613.5084409.9284397.6324279.8414202.0274233.2194265.3944240.074220.3864254.6374248.8514238.814265.6574281.9084336.8144339.7414399.3164446.51NANANA
us-gaap:LiabilitiesAndStockholdersEquity ███▇▇▇▇▇▇▇▆▆▅▅▄▄▄▃▃▄▃▃▃▃▃▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁6991.7636894.6856887.6226758.5946773.3836661.4116657.1296597.6596580.0196544.5326313.2126184.865913.0935600.1875458.2795389.4465360.6135128.3565137.2515299.7644996.8854813.0584802.8864926.4434838.5544613.5084409.9284397.6324279.8414202.0274233.2194265.3944240.074220.3864254.6374248.8514238.814265.6574281.9084336.8144339.741NA4446.51NANANA
us-gaap:StockholdersEquity █▇▇█▇▇▇▇▆▆▆▆▅▄▄▂▂▁▁▃▃▃▂▂▂▂▂▂▁▂▂▂▂▁▁▁▁▁▁▁2248.9052181.5212139.5452185.12142.9622163.4382175.0142116.262052.2452000.5671964.2811928.8731860.6521787.1371754.3221475.7151422.5421373.8151350.9431624.1141577.3511535.9011506.4351461.7031423.2131410.5541400.3461429.071388.2911409.2241434.9391427.4521411.2231392.1591387.1751372.4081350.631334.4081334.2611358.862NANA1420.923NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AssetsCurrent ▅▃▃▃▃▁▁▁▁▁▄▄▃▃▃▃▃▃▄▅▄▃▄▇▇▆▆▇▆▇███▇█▇▆▆▆▇▆1130.833998.781982.802977.278945.849768.968760.346810.389779.931781.3941020.7941052.072975.225952.623995.133994.132947.009916.5861047.0771124.8371028.018984.6911017.571358.3851331.0851284.6751291.0031337.0931315.721409.7651464.4371479.6021436.0921413.1241434.041392.4421323.7551300.011280.4641329.8411325.001NA1369.565NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▆▄▄▇█▅▂▅▅▅▆▆▃▅▃▂▃▂▃▁▄▄▄▂▃▂▂▃▁▂▃▅▃▃▂▃▂▂▂▂▃▂▂▂▁345.854231.005215.723418.228452.247289.54487.206307.909253.661290.885328.384324.561175.728251.447181.79298.085143.44895.441146.76649.767227.982246.765203.035126.744171.16591.108132.275151.39369.79182.603170.636267.746140.546143.075133.772136.458108.71498.946129.52684.598139.131127.74112.33882.77459.18NA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents 345.854NA215.723NA452.247NA87.206NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ReceivablesNetCurrent NANA34.5NANANA83.0NANA78.3764.19462.23371.2461.32742.73140.33738.01738.55846.91649.64962.3880.05362.16264.70271.82771.81683.09992.662118.584121.13111.18694.80686.892135.833130.102126.81139.261146.233130.51133.056143.864NA110.207NANANA
 us-gaap:ReceivablesNetCurrent us-gaap:ProductOrService skyw:FlyingAgreementsNANA27.5NANANA58.8NANANA52.756.464.048.833.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsCurrent ▂▃▄▃▃▄▅▃▂▃▃█▅▄▃▄▂▃▂▄▁▂▂▅▃▃▂▃▂▂▄▄▃▃▄▄▄▅▄▄▄21.26323.29227.3226.4624.58430.13135.55324.93217.21624.92126.61453.04234.55530.22526.93830.42418.30524.67618.11127.90412.79917.95118.3634.30824.8421.4516.30824.79818.8818.70727.39227.79923.3523.1130.59631.59931.21737.41831.40729.85927.283NA32.308NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:PropertyPlantAndEquipmentGross ███▇▇▇▇▇▆▆▆▅▅▄▄▄▃▃▃▅▄▄▄▃▃▃▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁7956.2667876.7837818.0437558.7987559.9717497.3237393.0577203.0437108.3797005.2496767.4726555.3826264.0185908.555650.4785547.4715496.3555302.9695140.0056112.4985831.095624.3485556.7285501.5385380.7935149.5084923.5634828.0094674.3614463.1744400.8514364.024329.1784287.7224272.0114273.3024280.6114277.5254264.3214205.5254155.782NA4115.615NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment █▇▇▆▆▅▅▄▄▃▃▃▃▂▂▂▁▁▁▆▅▅▅▅▅▄▄▄▄▄▃▃▃▃▂▂▂▂▂▁▁2671.942563.1232455.9952351.0522233.2752103.5851998.3761906.3451817.3331730.6811761.7281680.1151604.8141533.3461467.4751405.2071361.8381374.6661318.3082218.3912173.6442121.7732085.9812029.9071975.3891930.1081902.3751869.3041835.3861797.9871749.0581699.7681651.3771608.5371561.0151525.4361483.3751435.4051380.8461327.6721278.124NA1172.796NANANA
us-gaap:PropertyPlantAndEquipmentNet ██████████▇▇▆▅▅▅▅▄▄▄▄▃▃▃▃▂▂▂▁▁▁▁▁▁▁▁▁▁▂▂▂5284.3265313.665362.0485207.7465326.6965393.7385394.6815296.6985291.0465274.5685005.7444875.2674659.2044375.2044183.0034142.2644134.5173928.3033821.6973894.1073657.4463502.5753470.7473471.6313405.4043219.43021.1882958.7052838.9752665.1872651.7932664.2522677.8012679.1852710.9962747.8662797.2362842.122883.4752877.8532877.658NA2942.819NANANA
us-gaap:OperatingLeaseRightOfUseAsset ▁▂▃▄▅▇█▇█262.172274.025282.362296.439310.016326.698336.009326.7336.703NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent NANA260.41277.131190.822172.007166.093163.872172.339146.672104.84468.16471.19469.18249.2242.47244.53643.69141.72352.84851.80854.25774.8985.36690.44297.24784.98988.523111.273112.639101.991105.98110.054111.39292.35390.73399.446104.59298.472109.06116.46NA112.379NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AccountsPayableCurrent ▄▅▃▂▅█▃▅▅▆▅▅▄▄▄▃▃▃▂▂▂▃▃▃▃▃▃▂▃▃▂▂▁▁▁▁▂▂▁▂▂299.757315.238278.677244.047322.46407.29284.473328.854321.249340.195331.982320.432291.009290.14288.904276.307265.028263.532241.215248.176256.132261.043279.864265.807278.019270.617270.097252.18260.441269.306245.518231.38217.647227.127222.671225.153231.196240.098220.784236.272233.037NA206.49NANANA
us-gaap:ContractWithCustomerLiabilityCurrent █▁60.519.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent █▆▆▅▆▇▆▆▆▆▆▅▅▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁▂▂▂▂▁1109.358950.438941.722859.904986.1871019.843924.676961.539927.328945.327924.826913.445878.595837.818820.825799.134779.09750.508747.265759.619740.79729.383751.386734.134744.718697.065684.355659.911645.826636.192620.464604.157585.952587.135591.425600.066630.017634.241624.148625.499585.945NA562.64NANANA
us-gaap:LongTermDebtCurrent ▇▇█▇▅▇▇▇▆▇▆▇▇▆▅▅▅▅▅▅▄▄▄▄▄▃▂▂▂▂▁▁▁▁▁▁▂▂▂▂▁360.968357.463402.158360.288309.159364.579364.126362.582345.253362.797350.206357.327353.743335.429309.678303.423306.849293.644305.46300.142276.901274.325272.027264.852263.725232.46211.821202.067192.415181.379177.389174.962173.201172.759171.454175.424205.524203.943208.398199.34160.49NA159.039NANANA
us-gaap:OperatingLeaseLiabilityCurrent ▁▃▃▃▅▅█▅▂78.28982.67182.64183.29187.41588.64994.80687.47281.796NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent █▂▁▁▆▁▁▁▁▁▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▂▁▂▂▂▂▂▂▂▁199.99745.82826.11925.086138.00332.20532.41134.41635.00136.83665.00863.18756.65350.54248.64845.6444.02544.96345.08745.38743.06942.97240.80243.79840.54445.0742.77545.75541.0343.78837.43741.24737.13340.57239.59543.10138.9843.83838.50840.55935.355NA42.457NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:LongTermDebt ▇▇█▇▇▆▇▇▇▇█▇▇▆▅▅▆▅▄▃▂▁▁3013.233106.183203.6963068.0572973.2812902.1922993.1152984.8183064.2943097.1143159.9743109.0492969.382776.22687.0242684.2152759.5122614.9152545.5112225.1332039.8171939.0911948.803NANANA1745.811NANANA1470.568NANANA1642.022NANANA1815.391NANANA1897.975NANANA
us-gaap:LongTermDebtNoncurrent ▇███▇▇▇▇████▇▆▆▆▆▆▅▄▃▃▃▄▃▃▂▂▁▁▁▁▁▂▂▂▂▂▂▃▃2652.2622748.7172801.5382707.7692664.1222537.6132628.9892622.2362719.0412734.3172809.7682751.7222615.6372440.7712377.3462380.7922452.6632321.2712240.0511924.9911762.9161664.7661676.7761842.8551800.4521676.9061533.991467.5061377.3061285.5381293.1791349.2091382.8491437.6351470.5681526.4651525.2691577.7731606.9931626.3261658.122NA1738.936NANANA
us-gaap:DeferredFinanceCostsNoncurrentNet ▇█▆▇▁▂▁▁▁▁▂▂▂▂▂▂▃28.94231.21428.45929.69520.20921.09120.5820.10420.5820.76121.59821.91521.67421.37921.76122.20423.126NA21.908NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet █▇▆▇▆▆▅▃▁656.259639.046625.931638.938625.504633.11623.58596.897569.439NA518.159NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▆██▆▅▁▁▁▁▁▂▂▂▂▁▁▁▁▁▂▂▂▂▁▁▁▁▁▃▃▃▃▂▂▂▂▁▁▁▁▁137.119174.365173.041145.044116.03648.36845.63346.46946.4548.03766.8762.67862.00162.36342.54146.57447.55950.38750.84452.82252.46954.28356.19150.05248.60348.82549.62547.7373.60973.47576.30575.54459.13257.62857.42254.28548.77548.8250.19451.45851.773NA46.325NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▁▂▃▄▆▇▇▇█187.86200.598205.845221.839238.572259.039259.237254.258265.516NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo ▂▁▄▄██73.19272.15377.7876.92385.08485.409NA91.89293.75293.64NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree ▁▁▇▇██29.95429.27469.5369.41976.13275.776NA80.5476.68775.898NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour ▁▁▃▃██17.35416.72528.09128.09169.39469.623NA70.967.72867.668NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA15.75198.44828.09128.32NA65.52162.55862.498NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA82.719NA98.424100.234NA103.81988.14487.591NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity █▇▇█▇▇▇▇▆▆▆▆▅▄▄▂▂▁▁▃▃▃▂▂▂▂▂▂▁▂▂▂▂▁▁▁▁▁▁▁2248.9052181.5212139.5452185.12142.9622163.4382175.0142116.262052.2452000.5671964.2811928.8731860.6521787.1371754.3221475.7151422.5421373.8151350.9431624.1141577.3511535.9011506.4351461.7031423.2131410.5541400.3461429.071388.2911409.2241434.9391427.4521411.2231392.1591387.1751372.4081350.631334.4081334.2611358.862NANA1420.923NANANA
 us-gaap:CommonStockValue us-gaap:DebtInstrument skyw:PromissoryNoteCaresActPayrollSupportProgram█▁▆▆5.83.35.05.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CommonStocksIncludingAdditionalPaidInCapital ██▇▇▆▆▆▆▅▆▆▆▆▅▅▅▄▄▄▄▃▃▃▂▂▂▂▁▁▁▁▁717.714712.324704.675703.78694.997690.065686.806684.541680.802692.593690.91688.168682.545679.768672.593668.97664.917662.343657.353657.662649.624645.908641.643635.217631.078628.875626.521624.81621.956620.8618.511617.701NANA609.763NANANANANANANANANANANA
us-gaap:RetainedEarningsAccumulatedDeficit ██▇█▇██▇▇▆▆▅▅▄▄▂▂▁▁▃▃▂▂▂▂▁▁▂▁▁▂▂▁▁▁▁▁▁▁▁▁2149.92087.9062052.0062098.4562064.7942090.5092079.1792012.6911927.4121845.4671776.5851714.6211636.7681566.1141516.9571231.1691181.6011135.2651103.7511376.5851337.8491300.1791275.1421236.6271202.4371173.0311165.4781195.3511156.0741172.8671197.8191191.2651166.9211148.2771147.1171135.2291116.3461101.4251104.1441124.0741126.114NA1139.739NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities █▇▂▁▆█▄▆▆▄▇▆▅▅▄▆▅▄▃▅267.095231.59384.8656.42222.8269.483138.562220.345207.209154.914229.407222.305184.927165.895151.835200.506187.843143.94107.347171.284NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▆▂▅▆█▃▇▅▆▅▅▂▆▇▅▄▄▃▁-60.974-121.407-422.024-190.824-125.6154.987-351.74-56.245-172.144-76.905-241.046-194.624-447.661-100.073-56.283-166.714-279.433-248.907-326.351-537.544NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▁▅▅▄▁▃▁▂▁▃▅▆▃▃▂▅▄█▆-91.272-94.904134.659100.38565.513-122.132-7.525-109.852-72.289-115.50815.462121.152187.0153.833-11.845-79.155139.5953.649316.003188.045NANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:DepreciationDepletionAndAmortization ▆▆▆▇█▆▅▄▄▄▄▄▃▃▃▃▂▂▃▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▂▂▂▁▂▁▁▁▁109.895109.597110.146121.467131.638111.70895.16992.79590.14889.98688.20386.08882.71477.58577.35374.09571.20670.11475.53871.74369.88767.80167.55466.60364.65965.69167.25365.82264.25262.31661.69661.13561.17461.00160.75862.70364.18264.31563.89963.39363.69763.19361.19958.77158.383NA
us-gaap:NetCashProvidedByUsedInOperatingActivities █▇▂▁▆█▄▆▆▄▇▆▅▅▄▆▅▄▃▅267.095231.59384.8656.42222.8269.483138.562220.345207.209154.914229.407222.305184.927165.895151.835200.506187.843143.94107.347171.284NANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▆▂▅▆█▃▇▅▆▅▅▂▆▇▅▄▄▃▁-60.974-121.407-422.024-190.824-125.6154.987-351.74-56.245-172.144-76.905-241.046-194.624-447.661-100.073-56.283-166.714-279.433-248.907-326.351-537.544NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▂▂▁▂▂▄▂▂█▁▃▂▂▄▂4.4764.2243.280.7035.1533.54219.5655.1563.7952.075-1.47316.89.7659.30519.1925.855NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsToAcquireProductiveAssets ▁▂▅▁▂▂▄▂▃▆▄▅▆▅▂▂▅▄█▅▄▂▂▃▄▅▃▄▄▂▂▁▁▁▁▁26.43957.508272.1624.93772.26111.124194.238101.991135.662414.579202.205321.566364.717267.788116.99853.499295.802223.099527.94309.101222.67499.28642.515149.504253.8269.138190.559192.83242.3673.52447.46330.86833.42530.28933.76616.18NANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▁▅▅▄▁▃▁▂▁▃▅▆▃▃▂▅▄█▆-91.272-94.904134.659100.38565.513-122.132-7.525-109.852-72.289-115.50815.462121.152187.0153.833-11.845-79.155139.5953.649316.003188.045NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ProceedsFromIssuanceOfLongTermDebt ▂▁█▄55.49939.931205.079103.226NANA100.1260.079.97419.94158.502242.519282.327101.31786.8520.0226.842157.983428.559248.544180.73468.23245.649113.664229.485203.083136.935136.276158.10829.281NANANANANANANANA38.227NANANA0.0NANANA
us-gaap:RepaymentsOfLongTermDebt ▇▇▄▁▂▅▅▄▆▅▅▅▅▄▄▄▄▅▅▄▄▃█▄▄▃▃▂▃▂▃▂▃▂▅▂▃▂▃▂▃▂▄▂146.771135.00770.2221.99325.39389.79691.19280.05112.99698.204107.852102.53688.871.58784.51376.19581.44688.104103.76462.06679.13257.196169.94170.13474.67439.52860.69736.42455.30432.93253.60331.87954.34431.627104.76828.90450.92333.67548.50231.17348.46630.89782.07629.511NANA
us-gaap:PaymentsOfDividendsCommonStock NANA0.00.07.026.0396.0616.1076.1585.1415.1945.2055.2054.144.1474.1414.1392.5882.5872.5742.0552.04NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock NANA-6.1650.00.026.165-15.45925.00334.62134.31115.72815.2530.023.4675.6780.4590.213.671NANANANA0.00.0NANA0.00.05.3383.0760.011.5430.00.1960.00.0050.00.8974.51515.90720.67819.58117.49111.339NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:AircraftType,us-gaap:Range skyw:E175,srt:MaximumNANA3.45e-06NANANA4.1e-084.1e-084.1e-08NANA5.0000000000000004e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:AircraftType,us-gaap:Range skyw:E175,srt:MinimumNANA2.3e-06NANANA3.4e-083.7999999999999996e-083.7999999999999996e-08NANA4.6e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:AircraftType,us-gaap:StatementScenario srt:CRJ700,skyw:MonthlyInstallmentsNANA4e-06NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:AircraftType,us-gaap:StatementScenario srt:CRJ700,skyw:QuarterlyInstallmentsNANA3.5e-06NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument skyw:SecuredTermLoanNANANA3.22e-06NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType skyw:SecuredTermLoanNANA3.22e-06NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range,us-gaap:DebtInstrument,us-gaap:SubsequentEventType srt:Minimum,skyw:PromissoryNote,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range,us-gaap:DebtInstrument,us-gaap:TypeOfArrangement srt:Minimum,skyw:PromissoryNote,skyw:PayrollSupportProgram3AgreementNA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:StatementScenario,us-gaap:DebtInstrument,us-gaap:SubsequentEventType skyw:ThereafterUntilTenthAnniversaryOfClosingDate,skyw:PromissoryNote,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:StatementScenario,us-gaap:DebtInstrument,us-gaap:SubsequentEventType skyw:UntilFifthAnniversaryOfClosingDate,skyw:PromissoryNote,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:StatementScenario,us-gaap:DebtInstrument,us-gaap:TypeOfArrangement skyw:ThereafterUntilTenthAnniversaryOfClosingDate,skyw:PromissoryNote,skyw:PayrollSupportProgram3AgreementNA2e-06NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:StatementScenario,us-gaap:DebtInstrument,us-gaap:TypeOfArrangement skyw:TillFifthAnniversaryOfClosingDate,skyw:PromissoryNote,skyw:PayrollSupportProgram3AgreementNA1e-06NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:StatementScenario,us-gaap:LongtermDebtType,us-gaap:TypeOfArrangement skyw:FinalFiveYears,us-gaap:UnsecuredDebt,skyw:PayrollSupportProgramAgreementNANA2e-06NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:StatementScenario,us-gaap:LongtermDebtType,us-gaap:TypeOfArrangement skyw:FirstFiveYears,us-gaap:UnsecuredDebt,skyw:PayrollSupportProgramAgreementNANA1e-06NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue us-gaap:DebtInstrument

us-gaap:CommonStockValue

skyw:PromissoryNoteCaresActPayrollSupportProgram


Common
Period End2021-06-302021-03-312020-12-312020-09-30
Value5800000.03300000.05000000.05000000.0
Percentage of CommonStockValue100.0100.0100.0100.0
Percentage of Assets0.10.00.10.1
Percentage of Assets skyw:PromissoryNoteCaresActPayrollSupportProgram0.00.00.00.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStock


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value82828282828281818181818181818079797777
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStock


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value-31.956-31.956-31.914-31.914-31.914-31.914-31.42-31.253-30.811-30.5-29.851-29.059-28.644-28.015-28.015-26.765-26.096
Percentage of CommonStockSharesOutstanding-38.8-38.8-38.9-38.9-38.9-38.9-38.4-38.2-37.7-37.3-36.7-35.8-35.6-35.1-35.5-34.3-33.7

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value50505050505050515152525252535353525351525252515151525152515152525252525251505052535355565656
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value50505050505050505151515252515151515151515151505051515151515151515151515150505051525354555555
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.230.71-0.930.67-0.510.61.441.81.721.711.31.61.461.055.61.040.980.67-5.220.80.780.530.80.720.610.19-0.540.81-0.29-0.440.170.510.40.060.270.410.33-0.01-0.3500.03-0.210.680.460.330.27
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.220.71-0.930.66-0.510.591.431.791.711.691.281.571.431.035.461.010.950.65-5.220.790.770.520.780.710.610.18-0.540.79-0.29-0.440.170.50.390.060.270.40.33-0.01-0.3500.03-0.210.670.450.330.26
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value2.92.62.12.11.72.02.13.92.82.74.91.91.62.31.11.31.50.91.11.71.11.11.31.11.11.31.21.21.8
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.40.50.50.60.20.30.30.50.30.30.60.20.20.30.10.20.20.10.10.20.10.10.20.10.10.10.10.10.2

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value6135-46.4533-25.408297291888867837554289535034-270.2734140274036319.921-28.42839-14.695-22.8648.73126203.296132017-0.3-19.2890.7462.042-10.594
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax9.46.7-7.97.3-7.34.19.812.011.812.28.410.09.46.937.66.66.44.7-35.75.25.03.65.34.64.01.3-3.54.8-1.8-3.01.13.22.40.41.72.41.8-0.0-2.10.10.2-1.2

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value541453617382354663618613600627681691678695678700684670
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax82.584.9104.783.7101.390.983.180.780.686.784.983.484.388.787.986.286.589.8

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService

skyw:AircraftFuel


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value251915136.821253131302536252526-5.97302818
Percentage of CostOfGoodsAndServicesSold4.84.22.63.61.93.85.15.15.14.15.43.73.83.9-0.94.34.22.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.93.62.73.01.93.54.24.14.13.54.63.13.23.4-0.83.73.72.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:AircraftFuel0.00.00.00.00.00.00.0100.0100.00.00.084.886.30.00.00.00.00.0

skyw:AircraftMaintenanceMaterialsAndRepairs


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value190203187150121160137133124118132142139141145148152132
Percentage of CostOfGoodsAndServicesSold35.244.930.339.234.224.122.321.820.818.919.420.620.620.421.521.222.219.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax29.138.131.832.834.721.918.517.616.816.316.517.217.418.118.918.319.217.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:AircraftMaintenanceMaterialsAndRepairs0.00.00.00.00.00.00.0100.0100.00.00.0100.0100.00.00.00.00.00.0

skyw:AircraftRentals


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value151515151617161718203536374447545557
Percentage of CostOfGoodsAndServicesSold2.93.42.64.14.72.62.62.93.03.25.35.35.56.47.07.98.18.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax2.42.92.73.54.82.32.22.32.42.84.54.44.75.76.26.87.07.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:AircraftRentals0.00.00.00.00.00.00.0100.0100.09.70.017.618.623.60.025.726.629.1

skyw:AirportRelatedExpenses


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value222423182130292730302230302957222031
Percentage of CostOfGoodsAndServicesSold4.15.43.84.76.14.64.84.55.14.93.34.44.44.28.43.32.94.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.44.64.03.96.24.24.03.74.14.22.83.63.73.77.42.82.54.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:AirportRelatedExpenses0.00.00.00.00.00.00.0100.0100.00.00.0117.9115.90.00.00.00.00.0

us-gaap:CostOfGoodsAndServicesSold us-gaap:StatementBusinessSegments

skyw:SkyWestAirlines


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value477387543303275594562560545545517512494498475472442417
Percentage of CostOfGoodsAndServicesSold88.085.588.179.277.889.591.091.390.987.075.874.172.871.870.167.464.662.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax72.672.692.266.378.881.475.773.773.375.464.461.861.363.761.758.155.955.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:SkyWestAirlines90.495.40.089.7121.197.90.087.387.093.20.084.484.189.70.084.485.289.8

skyw:SkywestLeasing


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value646573797869555354524239362928272724
Percentage of CostOfGoodsAndServicesSold12.014.511.920.822.210.59.08.79.18.46.25.75.34.24.24.04.03.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax9.912.312.517.422.49.57.57.07.47.35.34.74.53.83.73.43.53.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:SkywestLeasing50.151.40.066.864.356.40.045.046.846.30.047.948.744.70.044.945.845.1

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value8149-59.37546-33.242399711811511490109986768868052-426.22266664465595215-36.99842-2.894-43.45143933-2.4042535270.677-25.0126.741-1.012-19.993
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax12.49.4-10.110.1-9.55.413.215.615.515.811.313.312.28.68.810.710.27.0-56.28.38.35.88.77.56.72.1-4.55.1-0.4-5.61.84.63.9-0.33.14.12.90.1-2.80.7-0.1-2.3

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidationItems

us-gaap:OperatingSegments


Income
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value44-35.3293611411163106976185795165654458
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest96.1106.392.496.796.555.896.999.592.298.498.498.799.199.399.097.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax9.7-10.14.915.115.08.812.812.17.910.510.06.98.28.25.87.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, skyw:SkyWestAirlines


Income
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value31-51.4991078773690895281714159694559
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest69.2154.926.065.867.631.582.590.778.894.388.379.789.4104.3102.399.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax7.0-14.71.410.310.55.010.911.16.810.19.05.67.48.66.07.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments skyw:SkyWestAirlines0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, skyw:SkywestLeasing


Income
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value1216253633321514151312118.6956.8716.4665.898
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest26.9-48.666.430.928.928.414.514.623.215.615.222.713.110.414.59.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax2.74.63.64.84.54.51.91.82.01.71.61.61.10.90.80.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:OperatingSegments skyw:SkywestLeasing0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1914-12.92512-7.5279.0912527272623262212-221.69323017-155.9772526172523216.63-8.644279.736-20.2886.48217122.129111111-0.54-9.807-2.222-3.336-7.47141311
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax2.92.6-2.22.7-2.21.23.43.63.73.63.03.22.81.6-28.74.13.82.4-20.63.23.32.33.43.02.70.9-1.13.21.2-2.60.82.11.50.31.41.41.2-0.1-1.1-0.2-0.4-0.91.82.01.8

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value300000.0157000.01409000.068000.0177000.0126000.075000.0702000.060000.01653000.0279000.0530000.01366000.0486000.02656000.01756000.0120000.0478000.0268000.0203000.057000.0684000.03610000.0881000.040000.0573000.01581000.0103000.0-69000.0451000.01169000.01629000.0492000.0388000.086000.037000.0-1423000.0-54000.0-2530000.0-366000.0231000.0467000.0-17277000.0-113000.0
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.00.00.20.00.10.00.00.10.00.20.00.10.20.10.30.20.00.10.00.00.00.10.50.10.00.10.20.0-0.00.10.10.20.10.00.00.0-0.2-0.0-0.3-0.00.00.1-2.2-0.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value333131303030303132323331282626272724221918171919181817161615161617171819191920202020212121
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax5.25.95.46.68.84.14.24.24.44.54.23.83.63.33.43.33.43.32.92.52.32.32.62.52.32.42.12.02.02.02.02.02.12.22.32.32.12.12.22.12.12.32.73.23.3

us-gaap:InterestExpense us-gaap:StatementBusinessSegments

skyw:SkyWestAirlines


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value6.2193.1293.5342.8683.4382.5412.8263.1653.7163.8184.2994.0444.2024.4764.7335.2765.7355.7996.2146.5846.7546.659-10.37417151412111010101011111212121212121212
Percentage of InterestExpense18.310.011.19.511.18.49.210.011.311.712.712.914.617.118.119.521.223.627.933.136.937.6-53.585.685.475.970.668.166.164.064.263.664.164.064.063.163.763.564.363.262.963.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.90.60.60.61.00.30.40.40.50.50.50.50.50.60.60.60.70.80.80.80.80.9-1.42.12.01.81.51.41.31.31.31.31.31.41.51.41.31.41.41.31.41.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:SkyWestAirlines1.20.80.00.81.50.40.00.50.60.70.00.70.70.80.00.91.11.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

skyw:SkywestLeasing


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value27282827272728282928292623202020201714119.9168.9438.6228.1556.453
Percentage of InterestExpense81.790.088.990.588.991.690.890.088.788.387.185.182.779.878.576.874.871.865.758.854.250.544.541.035.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax4.25.34.86.07.93.83.83.73.94.03.73.23.02.72.72.62.62.41.91.51.21.21.11.00.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:SkywestLeasing21.422.00.022.822.522.50.024.024.825.20.032.632.031.70.033.433.732.80.031.732.032.00.032.333.4

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value3531295410313132333432302826272626242218191624182215211319132013221423152315241525162616
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax5.35.95.011.83.04.34.34.34.54.74.13.73.53.43.63.33.43.22.92.32.42.23.32.32.82.02.61.62.41.72.61.62.61.82.91.82.61.72.71.62.71.93.32.4

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value6135-46.4533-25.715297291888867837554289535034-270.2444140274036319.62-27.86841-14.737-22.8878.60926203.233132016-0.682-17.9670.1161.579-11.06337251815
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax9.46.7-7.97.4-7.34.19.812.011.812.28.410.09.46.937.66.66.44.7-35.75.25.03.65.44.64.01.3-3.45.0-1.8-3.01.13.12.50.41.72.41.8-0.1-2.00.00.2-1.34.73.72.92.4

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value613533-25.715297291888867837554
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax9.46.77.4-7.34.19.812.011.812.28.410.09.46.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.0

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-33.65-30.854-31.706-28.342-28.839-27.242-27.517-27.703-28.75818-30.643-28.0-28.351-20.971-24.701-25.693-25.733-17.825-16.8119.264-18.245-15.401-15.73-11.807-16.843-10.199-18.194-22.059-18.159-21.679-22.786-28.933-20.797-18.76-0.374-19.033-18.648
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-5.1-5.8-5.4-6.2-8.2-3.7-3.7-3.6-3.92.5-3.8-3.4-3.5-2.7-3.2-3.2-3.3-2.3-2.11.1-2.2-2.0-2.0-1.4-2.0-1.3-2.2-2.5-1.9-2.4-2.5-3.0-2.2-2.2-0.0-2.8-2.9

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value11580-27.66974-4.4036612514614496121137126889211210676-404.46485846152786934-19.7025913-27.7743056501543544620-4.98826190.22751584942
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax17.515.1-4.716.3-1.39.116.919.319.413.315.116.615.711.312.113.813.510.2-53.410.710.58.16.99.98.94.5-2.47.11.6-3.63.86.66.01.95.46.45.02.2-0.62.82.00.06.58.57.66.7

Revenue From Contract With Customer Including Assessed Tax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value656534589457350729743760744723803829805783771812791747758799801762752794788760813834816772804850839803810865937921899955933865796686649632
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService

skyw:AircraftLeases


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value256231227208168242208207206207215208201
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax39.143.338.645.648.033.328.127.327.828.726.825.225.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax39.143.338.645.648.033.328.127.327.828.726.825.225.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:AircraftLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

skyw:AircraftOperations


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value273211270175132366382385383386451472462469437462459445
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax41.639.545.938.437.750.251.450.751.653.456.257.057.559.956.757.058.059.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax41.639.545.938.437.750.251.450.751.653.456.257.057.559.956.757.058.059.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:AircraftOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

skyw:AirportCustomerServiceAndOtherRevenue


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value7.5658.4144.1849.896
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.21.61.21.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.21.61.21.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:AirportCustomerServiceAndOtherRevenue100.0100.0100.0100.0

skyw:FlyingAgreements


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value632511569445336709725738725700791816793767761800781734
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax96.395.696.797.396.197.297.597.297.496.798.698.498.598.098.798.698.898.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax96.395.696.797.396.197.297.597.297.496.798.698.498.598.098.798.698.898.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:FlyingAgreements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

skyw:LeaseAirportServiceAndOther


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value24231213202119
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.74.42.73.92.82.82.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.74.42.73.92.82.82.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:LeaseAirportServiceAndOther100.0100.0100.0100.0100.0100.0100.0

skyw:LeaseAirportServicesAndOther


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value24231912132018211923
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.74.43.32.73.92.82.52.82.63.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.74.43.32.73.92.82.52.82.63.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:LeaseAirportServicesAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

skyw:ProrateAgreements


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1036871603610013414513410612513412910911012411390
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax15.712.812.113.310.313.718.019.218.114.715.616.216.114.014.315.314.412.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax15.712.812.113.310.313.718.019.218.114.715.616.216.114.014.315.314.412.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:ProrateAgreements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementBusinessSegments

skyw:SkyWestAirlines


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value527406464337227606623641627585595607587556548558519464
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax80.376.078.773.965.183.183.984.484.280.974.173.272.971.071.268.865.762.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax80.376.078.773.965.183.183.984.484.280.974.173.272.971.071.268.865.762.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:SkyWestAirlines100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

skyw:SkywestLeasing


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value129128125119122123119118117113888274666362595345363027182519
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax19.724.021.326.134.916.916.115.615.815.711.19.99.28.48.37.77.67.26.04.63.93.72.53.22.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax19.724.021.326.134.916.916.115.615.815.711.19.99.28.48.37.77.67.26.04.63.93.72.53.22.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:SkywestLeasing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues us-gaap:ProductOrService

us-gaap:Revenues

skyw:AircraftLeases


Revenuesus-gaap:
Period End2020-09-302020-06-302019-09-302019-06-30
Value208168207206
Percentage of Revenues100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax45.648.027.327.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:AircraftLeases100.0100.0100.0100.0

skyw:AircraftOperations


Revenuesus-gaap:
Period End2020-09-302020-06-302019-09-302019-06-30
Value175132385383
Percentage of Revenues84.378.6185.8185.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax38.437.750.751.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:AircraftOperations100.0100.0100.0100.0

skyw:AirportCustomerServiceAndOther


Revenuesus-gaap:
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5.3094.18420461110231113111510119.78812
Percentage of Revenues2.52.50.00.05.54.90.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.21.22.86.31.51.33.31.41.61.52.01.31.41.21.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:AirportCustomerServiceAndOther0.00.0100.00.053.052.7100.0100.0100.0100.0100.0100.0100.0100.0100.0

skyw:FlyingAgreements


Revenuesus-gaap:
Period End2020-09-302020-06-302019-12-312019-09-302019-06-30
Value445336725738725
Percentage of Revenues213.4200.10.0356.1350.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax97.396.197.597.297.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:FlyingAgreements100.0100.0100.0100.0100.0

skyw:LeaseAirportServiceAndOther


Revenuesus-gaap:
Period End2020-09-302020-06-302019-09-302019-06-30
Value12132119
Percentage of Revenues6.08.110.39.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax2.73.92.82.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:LeaseAirportServiceAndOther100.0100.0100.0100.0

skyw:ProrateAgreements


Revenuesus-gaap:
Period End2020-09-302020-06-302019-09-302019-06-30
Value6036145134
Percentage of Revenues29.121.570.365.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax13.310.319.218.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax skyw:ProrateAgreements100.0100.0100.0100.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value69916894688767586773666166576597658065446313618459135600545853895360512851375299499648134802492648384613440943974279420242334265424042204254424842384265428143364339439944464310
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:StatementBusinessSegments

skyw:SkyWestAirlines


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value30892924280428362789265027282744273827382531225122222184222820882251222423432259216022922319352334063191301928252688253525322711265626362633263926042595259525742545254125872436
Percentage of Assets44.242.440.742.041.239.841.041.641.641.840.136.437.639.040.838.742.043.445.642.643.247.648.371.570.469.268.564.262.860.359.863.662.762.561.962.161.460.960.659.458.757.858.256.5
Percentage of Assets44.242.440.742.041.239.841.041.641.641.840.136.437.639.040.838.742.043.445.642.643.247.648.371.570.469.268.564.262.860.359.863.662.762.561.962.161.460.960.659.458.757.858.256.5
Percentage of Assets skyw:SkyWestAirlines100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

skyw:SkywestLeasing


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value390239704083392239844011392838533841380635023368312728342630257925802338217416921418121811501125996526
Percentage of Assets55.857.659.358.058.860.259.058.458.458.255.554.552.950.648.247.948.145.642.331.928.425.324.022.820.611.9
Percentage of Assets55.857.659.358.058.860.259.058.458.458.255.554.552.950.648.247.948.145.642.331.928.425.324.022.820.611.9
Percentage of Assets skyw:SkywestLeasing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value699168946887675867736661665765976580654463136184591356005458538953605128513752994996481348024926483846134409439742794202423342654240422042544248423842654281433643394446
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312009-12-312008-12-31
Value2248218121392185214221632175211620522000196419281860178717541475142213731350162415771535150614611423141014001429138814091434142714111392138713721350133413341358142013521275
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets32.231.631.132.331.632.532.732.131.230.631.131.231.531.932.127.426.526.826.330.631.631.931.429.729.430.631.832.532.433.533.933.533.333.032.632.331.931.331.231.332.031.40.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value717712704703694690686684680692690688682679672657641626618
Percentage of StockholdersEquity31.932.732.932.232.431.931.632.333.234.635.235.736.738.038.348.742.644.743.1
Percentage of Assets10.310.310.210.410.310.410.310.410.310.610.911.111.512.112.312.813.414.214.6
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value21492087205220982064209020792012192718451776171416361566151611031275116511971147110411391052977
Percentage of StockholdersEquity95.695.795.996.096.496.695.695.193.992.290.488.988.087.686.581.784.683.283.582.782.880.277.876.7
Percentage of Assets30.730.329.831.030.531.431.230.529.328.228.127.727.728.027.821.526.526.428.327.025.825.624.40.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-618.709-618.709-617.136-617.136-617.136-617.136-590.971-580.972-555.969-537.493-503.182-473.898-458.645-458.645-435.178-410.09-410.09-391.364-382.95-371.211-370.309-309.628-279.619-261.174
Percentage of StockholdersEquity-27.5-28.4-28.8-28.2-28.8-28.5-27.2-27.5-27.1-26.9-25.6-24.6-24.6-25.7-24.8-30.4-27.2-27.9-26.7-26.8-27.8-21.8-20.7-20.5
Percentage of Assets-8.8-9.0-9.0-9.1-9.1-9.3-8.9-8.8-8.4-8.2-8.0-7.7-7.8-8.2-8.0-8.0-8.5-8.9-9.0-8.7-8.6-7.0-6.50.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value11309989829779457687608107797811020105297595299599494791610471124102898410171358133112841291133713151409146414791436141314341392132313001280132913251369
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets16.214.514.314.514.011.511.412.311.911.916.217.016.517.018.218.417.717.920.421.220.620.521.227.627.527.829.330.430.733.534.634.733.933.533.732.831.230.529.930.730.530.8

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value345231215418452289873072532903283241752511819814395146492272462031261719113215169821702671401431331361089812984139127112825976125
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.93.43.16.26.74.31.34.73.94.45.25.23.04.53.31.82.71.92.90.94.65.14.22.63.52.03.03.41.62.04.06.33.33.43.13.22.62.33.02.03.22.92.50.00.01.80.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302020-12-312020-06-302019-12-31
Value34521545287
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0
Percentage of Assets4.93.16.71.3

Receivables Net Current

us-gaap:ReceivablesNetCurrent

us-gaap:ReceivablesNetCurrent


Receivables
Period End2020-12-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3483786462716142403838464962806264717183921181211119486135130126139146130133143110
Percentage of ReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.51.21.21.01.01.21.10.80.70.70.80.90.91.21.71.31.31.51.61.92.12.82.92.62.22.03.23.13.03.33.43.03.13.32.5

us-gaap:ReceivablesNetCurrent us-gaap:ProductOrService

skyw:FlyingAgreements


Receivables
Period End2020-12-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value27585256644833
Percentage of ReceivablesNetCurrent79.770.882.190.689.879.679.3
Percentage of Assets0.40.90.80.91.10.90.6
Percentage of Assets skyw:FlyingAgreements0.00.00.00.00.00.00.0

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value212327262430352417242653343026301824182712171834242116241818272723233031313731292732
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.40.40.40.50.50.40.30.40.40.90.60.50.50.60.30.50.40.50.30.40.40.70.50.50.40.60.40.40.60.70.60.50.70.70.70.90.70.70.60.7

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value795678767818755875597497739372037108700567676555626459085650554754965302514061125831562455565501538051494923482846744463440043644329428742724273428042774264420541554115
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets113.8114.2113.5111.8111.6112.5111.1109.2108.0107.0107.2106.0105.9105.5103.5102.9102.5103.4100.1115.3116.7116.9115.7111.7111.2111.6111.6109.8109.2106.2104.0102.3102.1101.6100.4100.6101.0100.399.697.095.892.6

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value267125632455235122332103199819061817173017611680160415331467140513611374131822182173212120852029197519301902186918351797174916991651160815611525148314351380132712781172
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets38.237.235.734.833.031.630.028.927.626.427.927.227.127.426.926.125.426.825.741.943.544.143.441.240.841.843.142.542.942.841.339.938.938.136.735.935.033.732.230.629.526.4

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value528453135362520753265393539452965291527450054875465943754183414241343928382138943657350234703471340532193021295828382665265126642677267927102747279728422883287728772942
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets75.677.177.977.178.681.081.080.380.480.679.378.878.878.176.676.977.176.674.473.573.272.872.370.570.469.868.567.366.363.462.662.563.263.563.764.766.066.667.366.466.366.2

us-gaap:PropertyPlantAndEquipmentNet us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AssetsLeasedToOthers


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value26026827112613215497763523
Percentage of PropertyPlantAndEquipmentNet4.95.05.12.42.52.91.81.40.70.4
Percentage of Assets3.73.93.91.92.02.31.51.20.50.4
Percentage of Assets us-gaap:AssetsLeasedToOthers0.00.00.00.00.00.00.00.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value262274282296310326336326336
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.74.04.14.44.64.95.05.05.1

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value260277190172166163172146104687169494244434152515474859097848811111210110511011192909910498109116112
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.84.12.82.62.52.52.62.21.71.11.21.20.90.80.80.90.81.01.01.11.61.71.92.11.92.02.62.72.42.52.62.62.22.12.32.52.32.52.72.5

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value299315278244322407284328321340331320291290288276265263241248256261279265278270270252260269245231217227222225231240220236233206
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.34.64.03.64.86.14.35.04.95.25.35.24.95.25.35.14.95.14.74.75.15.45.85.45.75.96.15.76.16.45.85.45.15.45.25.35.55.65.25.45.44.6

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


Contract
Period End2021-06-302021-03-31
Value6019
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0
Percentage of Assets0.90.3

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value11099509418599861019924961927945924913878837820799779750747759740729751734744697684659645636620604585587591600630634624625585562
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets15.913.813.712.714.615.313.914.614.114.414.614.814.915.015.014.814.514.614.514.314.815.215.614.915.415.115.515.015.115.114.714.213.813.913.914.114.914.914.614.413.512.7

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value360357402360309364364362345362350357353335309303306293305300276274272264263232211202192181177174173172171175205203208199160159
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.25.25.85.34.65.55.55.55.25.55.55.86.06.05.75.65.75.75.95.75.55.75.75.45.55.04.84.64.54.34.24.14.14.14.04.14.84.84.94.63.73.6

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value788282838788948781
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.21.21.21.31.31.41.31.2

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value19945262513832323435366563565048454444454543424043404542454143374137403943384338403542
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.90.70.40.42.00.50.50.50.50.61.01.01.00.90.90.80.80.90.90.90.90.90.80.90.81.01.01.01.01.00.91.00.91.00.91.00.91.00.90.90.81.0

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value3013310632033068297329022993298430643097315931092969277626872684275926142545222520391939194817451470164218151897
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets43.145.146.545.443.943.645.045.246.647.350.150.350.249.649.249.851.551.049.642.040.840.340.639.634.738.642.442.7

us-gaap:LongTermDebt us-gaap:DebtInstrument

skyw:PromissoryNoteCaresActPayrollSupportProgram


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value953910510562
Percentage of LongTermDebt3.21.33.33.42.1
Percentage of Assets1.40.61.51.60.9
Percentage of Assets skyw:PromissoryNoteCaresActPayrollSupportProgram0.00.00.00.00.0

skyw:SecuredTermLoan


Long
Period End2020-09-30
Value60
Percentage of LongTermDebt2.0
Percentage of Assets0.9
Percentage of Assets skyw:SecuredTermLoan0.0

us-gaap:LongTermDebt us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-03-31
Value300031003200310030002930302030103090312031903130299028002710271027902640257022482061195919482107206419091745166915691466147015241556161016421642
Percentage of LongTermDebt99.699.899.9101.0100.9101.0100.9100.8100.8100.7101.0100.7100.7100.9100.9101.0101.1101.0101.0101.0101.1101.1100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.0
Percentage of Assets42.945.046.545.944.344.045.445.647.047.750.550.650.650.049.650.352.051.550.042.441.340.740.642.842.741.439.638.036.734.934.735.736.738.238.638.5
Percentage of Assets us-gaap:FairValueInputsLevel2 us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value265227482801270726642537262826222719273428092751261524402377238024522321224019241762166416761842180016761533146713771285129313491382143714701526152515771606162616581738
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets37.939.940.740.139.338.139.539.741.341.844.544.544.243.643.644.245.845.343.636.335.334.634.937.437.236.334.833.432.230.630.531.632.634.134.635.936.037.037.537.538.239.1

Deferred Finance Costs Noncurrent Net

us-gaap:DeferredFinanceCostsNoncurrentNet

us-gaap:DeferredFinanceCostsNoncurrentNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value283128292021202020202121212121222321
Percentage of DeferredFinanceCostsNoncurrentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.50.40.40.30.30.30.30.30.30.30.40.40.40.40.40.40.4

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value656639625638625633623596569518
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.49.39.19.59.29.59.49.08.78.2

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value13717417314511648454646486662626242464750505252545650484849477373767559575754484850515146
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.02.52.52.11.70.70.70.70.70.71.11.01.01.10.80.90.91.01.01.01.11.11.21.01.01.11.11.11.71.71.81.81.41.41.31.31.21.11.21.21.21.0

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value187200205221238259259254265
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.72.93.03.33.53.93.93.94.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value737277768585919393
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.01.01.11.11.31.31.41.41.4

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value292969697675807675
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.41.01.01.11.11.21.21.2

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value171628286969706767
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.40.41.01.01.11.01.0

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value15982828656262
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.21.50.40.41.01.01.0

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-312020-06-302020-03-312019-09-302019-06-302019-03-31
Value82981001038887
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0100.0100.0100.0100.0100.0
Percentage of Assets1.21.51.51.61.31.3

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value329350359380406434430425442
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.75.15.25.66.06.56.56.56.8

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312009-12-312008-12-31
Value2248218121392185214221632175211620522000196419281860178717541475142213731350162415771535150614611423141014001429138814091434142714111392138713721350133413341358142013521275
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets32.231.631.132.331.632.532.732.131.230.631.131.231.531.932.127.426.526.826.330.631.631.931.429.729.430.631.832.532.433.533.933.533.333.032.632.331.931.331.231.332.031.40.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value717712704703694690686684680692690688682679672657641626618
Percentage of StockholdersEquity31.932.732.932.232.431.931.632.333.234.635.235.736.738.038.348.742.644.743.1
Percentage of Assets10.310.310.210.410.310.410.310.410.310.610.911.111.512.112.312.813.414.214.6
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value21492087205220982064209020792012192718451776171416361566151611031275116511971147110411391052977
Percentage of StockholdersEquity95.695.795.996.096.496.695.695.193.992.290.488.988.087.686.581.784.683.283.582.782.880.277.876.7
Percentage of Assets30.730.329.831.030.531.431.230.529.328.228.127.727.728.027.821.526.526.428.327.025.825.624.40.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-618.709-618.709-617.136-617.136-617.136-617.136-590.971-580.972-555.969-537.493-503.182-473.898-458.645-458.645-435.178-410.09-410.09-391.364-382.95-371.211-370.309-309.628-279.619-261.174
Percentage of StockholdersEquity-27.5-28.4-28.8-28.2-28.8-28.5-27.2-27.5-27.1-26.9-25.6-24.6-24.6-25.7-24.8-30.4-27.2-27.9-26.7-26.8-27.8-21.8-20.7-20.5
Percentage of Assets-8.8-9.0-9.0-9.1-9.1-9.3-8.9-8.8-8.4-8.2-8.0-7.7-7.8-8.2-8.0-8.0-8.5-8.9-9.0-8.7-8.6-7.0-6.50.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue us-gaap:DebtInstrument

us-gaap:CommonStockValue

skyw:PromissoryNoteCaresActPayrollSupportProgram


Common
Period End2021-06-302021-03-312020-12-312020-09-30
Value5800000.03300000.05000000.05000000.0
Percentage of CommonStockValue100.0100.0100.0100.0
Percentage of Assets0.10.00.10.1
Percentage of Assets skyw:PromissoryNoteCaresActPayrollSupportProgram0.00.00.00.0

Common Stocks Including Additional Paid In Capital

us-gaap:CommonStocksIncludingAdditionalPaidInCapital

us-gaap:CommonStocksIncludingAdditionalPaidInCapital


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value717712704703694690686684680692690688682679672668664662657657649645641635631628626624621620618617609
Percentage of CommonStocksIncludingAdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.310.310.210.410.310.410.310.410.310.610.911.111.512.112.312.412.412.912.812.413.013.413.412.913.013.614.214.214.514.814.614.514.3

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value214920872052209820642090207920121927184517761714163615661516123111811135110313761337130012751236120211731165119511561172119711911166114811471135111611011104112411261139
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets30.730.329.831.030.531.431.230.529.328.228.127.727.728.027.822.822.022.121.526.026.827.026.525.124.925.426.427.227.027.928.327.927.527.227.026.726.325.825.825.925.925.6

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2672318456222269138220207154229222184165151200187143107171
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax40.743.314.412.363.736.918.629.027.821.428.626.823.021.219.724.723.719.314.221.4

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-60.974-121.407-422.024-190.824-125.6154-351.74-56.245-172.144-76.905-241.046-194.624-447.661-100.073-56.283-166.714-279.433-248.907-326.351-537.544
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-9.3-22.7-71.6-41.7-35.97.5-47.3-7.4-23.1-10.6-30.0-23.5-55.6-12.8-7.3-20.5-35.3-33.3-43.1-67.2

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-91.272-94.90413410065-122.132-7.525-109.852-72.289-115.508151211873.833-11.845-79.15513953316188
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-13.9-17.822.821.918.7-16.7-1.0-14.4-9.7-16.01.914.623.20.5-1.5-9.717.67.241.723.5

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value109109110121131111959290898886827777747170757169676766646567656462616161616062646463636363615858
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationDepletionAndAmortization us-gaap:StatementBusinessSegments

skyw:SkyWestAirlines


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value535050595951444340403939383736343231353434349.9444424345434140393838383838383837363636
Percentage of DepreciationDepletionAndAmortization48.445.945.749.145.146.346.446.745.144.544.846.147.048.346.846.045.745.446.748.749.550.614.767.266.166.667.566.665.364.263.863.563.563.363.060.960.260.358.458.357.857.7

skyw:SkywestLeasing


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value5659596172595049494841373328282726231916131211108.194
Percentage of DepreciationDepletionAndAmortization51.654.154.350.954.953.753.653.354.954.447.043.940.737.336.237.137.933.926.222.419.818.017.216.212.7

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2672318456222269138220207154229222184165151200187143107171
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax40.743.314.412.363.736.918.629.027.821.428.626.823.021.219.724.723.719.314.221.4

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-60.974-121.407-422.024-190.824-125.6154-351.74-56.245-172.144-76.905-241.046-194.624-447.661-100.073-56.283-166.714-279.433-248.907-326.351-537.544
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-9.3-22.7-71.6-41.7-35.97.5-47.3-7.4-23.1-10.6-30.0-23.5-55.6-12.8-7.3-20.5-35.3-33.3-43.1-67.2

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4.4764.2243.280.7035.1533.542195.1563.7952-1.473169.7659.305195.855
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments To Acquire Productive Assets

us-gaap:PaymentsToAcquireProductiveAssets

us-gaap:PaymentsToAcquireProductiveAssets


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value26572724.9377211119410113541420232136426711653295223527309222994214925326919019224273473033303316
Percentage of PaymentsToAcquireProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireProductiveAssets us-gaap:StatementBusinessSegments

skyw:SkyWestAirlines


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value2135514.937293886674768284440363927253320157.92713-621.81714424626218518623466372121222611
Percentage of PaymentsToAcquireProductiveAssets82.561.219.0100.040.535.044.466.135.416.614.213.911.013.533.450.78.615.03.95.03.614.1-1462.696.697.197.497.396.897.090.178.171.265.774.079.171.6

skyw:SkywestLeasing


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value4.617222200.04372108348734516927332323076242651845022902128054124237
Percentage of PaymentsToAcquireProductiveAssets17.538.881.00.059.565.055.633.964.683.483.785.188.686.065.045.189.982.595.294.095.580.9128.783.093.6

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-91.272-94.90413410065-122.132-7.525-109.852-72.289-115.508151211873.833-11.845-79.15513953316188
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-13.9-17.822.821.918.7-16.7-1.0-14.4-9.7-16.01.914.623.20.5-1.5-9.717.67.241.723.5

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312011-12-312010-12-31
Value55392051031000.07919158242282101860.0226157428248180684511322920313613615829380.0
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value146135701.99325899180112981071028871847681881036279571697074396036553253315431104285033483148308229
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.00.07.026.0396.0616.1076.1585.1415.1945.2055.2054.144.1474.1414.1392.5882.5872.5742.0552.04
Percentage of PaymentsOfDividendsCommonStock0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-6.1650.00.026-15.45925343415150.0235.6780.4590.2130.00.00.00.05.3383.0760.0110.00.1960.00.0050.00.8974.5151520191711
Percentage of PaymentsForRepurchaseOfCommonStock100.00.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.00.0100.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:AircraftType, us-gaap:Range

us-gaap:DebtInstrumentInterestRateStatedPercentage

skyw:E175, srt:Maximum


Debt
Period End2020-12-312019-12-312019-09-302019-06-302018-09-30
Value3.450.0410.0410.0410.05
Percentage of DebtInstrumentInterestRateStatedPercentage100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations skyw:E175 srt:Maximum0.00.00.00.00.0

skyw:E175, srt:Minimum


Debt
Period End2020-12-312019-12-312019-09-302019-06-302018-09-30
Value2.30.0340.0380.0380.046
Percentage of DebtInstrumentInterestRateStatedPercentage66.782.992.792.792.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations skyw:E175 srt:Minimum0.00.00.00.00.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:AircraftType, us-gaap:StatementScenario

srt:CRJ700, skyw:MonthlyInstallments


Debt
Period End2020-12-31
Value4.0
Percentage of DebtInstrumentInterestRateStatedPercentage115.9
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:CRJ700 skyw:MonthlyInstallments0.0

srt:CRJ700, skyw:QuarterlyInstallments


Debt
Period End2020-12-31
Value3.5
Percentage of DebtInstrumentInterestRateStatedPercentage101.4
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:CRJ700 skyw:QuarterlyInstallments0.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument

skyw:SecuredTermLoan


Debt
Period End2020-09-30
Value3.22
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations skyw:SecuredTermLoan0.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType

skyw:SecuredTermLoan


Debt
Period End2020-12-31
Value3.22
Percentage of DebtInstrumentInterestRateStatedPercentage93.3
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations skyw:SecuredTermLoan0.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range, us-gaap:DebtInstrument, us-gaap:SubsequentEventType

srt:Minimum, skyw:PromissoryNote, us-gaap:SubsequentEvent


Debt
Period End2021-01-15
Value0
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:Minimum skyw:PromissoryNote us-gaap:SubsequentEvent0.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range, us-gaap:DebtInstrument, us-gaap:TypeOfArrangement

srt:Minimum, skyw:PromissoryNote, skyw:PayrollSupportProgram3Agreement


Debt
Period End2021-03-31
Value0
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:Minimum skyw:PromissoryNote skyw:PayrollSupportProgram3Agreement0.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:StatementScenario, us-gaap:DebtInstrument, us-gaap:SubsequentEventType

skyw:ThereafterUntilTenthAnniversaryOfClosingDate, skyw:PromissoryNote, us-gaap:SubsequentEvent


Debt
Period End2021-01-15
Value2.0
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations skyw:ThereafterUntilTenthAnniversaryOfClosingDate skyw:PromissoryNote us-gaap:SubsequentEvent0.0

skyw:UntilFifthAnniversaryOfClosingDate, skyw:PromissoryNote, us-gaap:SubsequentEvent


Debt
Period End2021-01-15
Value1.0
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations skyw:UntilFifthAnniversaryOfClosingDate skyw:PromissoryNote us-gaap:SubsequentEvent0.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:StatementScenario, us-gaap:DebtInstrument, us-gaap:TypeOfArrangement

skyw:ThereafterUntilTenthAnniversaryOfClosingDate, skyw:PromissoryNote, skyw:PayrollSupportProgram3Agreement


Debt
Period End2021-03-31
Value2.0
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations skyw:ThereafterUntilTenthAnniversaryOfClosingDate skyw:PromissoryNote skyw:PayrollSupportProgram3Agreement0.0

skyw:TillFifthAnniversaryOfClosingDate, skyw:PromissoryNote, skyw:PayrollSupportProgram3Agreement


Debt
Period End2021-03-31
Value1.0
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations skyw:TillFifthAnniversaryOfClosingDate skyw:PromissoryNote skyw:PayrollSupportProgram3Agreement0.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:StatementScenario, us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

skyw:FinalFiveYears, us-gaap:UnsecuredDebt, skyw:PayrollSupportProgramAgreement


Debt
Period End2020-12-31
Value2.0
Percentage of DebtInstrumentInterestRateStatedPercentage58.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations skyw:FinalFiveYears us-gaap:UnsecuredDebt skyw:PayrollSupportProgramAgreement0.0

skyw:FirstFiveYears, us-gaap:UnsecuredDebt, skyw:PayrollSupportProgramAgreement


Debt
Period End2020-12-31
Value1.0
Percentage of DebtInstrumentInterestRateStatedPercentage29.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations skyw:FirstFiveYears us-gaap:UnsecuredDebt skyw:PayrollSupportProgramAgreement0.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302017-09-302017-06-302016-09-302016-06-30
Value23.828.227.20.2260.2330.2310.2370.230.2450.2290.380.3760.3790.393
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value14.7414.7413.713.7313.5813.6416.4617.9918.4419.2619.96
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value625623518419565648575
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-31
Value1414142.223
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0

skyw:ContractWithCustomerLiabilityAdditionsMadeDuringPeriod

skyw:ContractWithCustomerLiabilityAdditionsMadeDuringPeriod


Contract
Period End2021-03-312020-09-30
Value2129
Percentage of ContractWithCustomerLiabilityAdditionsMadeDuringPeriod100.0100.0

skyw:CoronavirusAidReliefAndEconomicSecurityActApproximateAmountOfSecuredLoansToAirlineIndustry us-gaap:Range

skyw:CoronavirusAidReliefAndEconomicSecurityActApproximateAmountOfSecuredLoansToAirlineIndustry

srt:Maximum


Coronavirus
Period End2020-12-312020-09-302020-03-27
Value0.00.025000
Percentage of CoronavirusAidReliefAndEconomicSecurityActApproximateAmountOfSecuredLoansToAirlineIndustry0.00.0100.0

skyw:CoronavirusAidReliefAndEconomicSecurityActWarrantIssuance

skyw:CoronavirusAidReliefAndEconomicSecurityActWarrantIssuance


Coronavirus
Period End2020-12-312020-09-302020-06-30
Value05403000.02845000.0
Percentage of CoronavirusAidReliefAndEconomicSecurityActWarrantIssuance0.0100.0100.0

skyw:CoronavirusAidReliefAndEconomicSecurityActWarrantIssuance us-gaap:StatementEquityComponents

us-gaap:CommonStock


Coronavirus
Period End2020-09-302020-06-30
Value5403000.02845000.0
Percentage of CoronavirusAidReliefAndEconomicSecurityActWarrantIssuance100.0100.0

skyw:DecreaseInBlockHoursPercent us-gaap:UnusualOrInfrequentItem

skyw:DecreaseInBlockHoursPercent

skyw:CoronavirusDisease2019


Decrease
Period End2020-09-30
Value40.8
Percentage of DecreaseInBlockHoursPercent100.0

skyw:DecreaseInDeparturesPercent us-gaap:UnusualOrInfrequentItem

skyw:DecreaseInDeparturesPercent

skyw:CoronavirusDisease2019


Decrease
Period End2020-09-30
Value37.3
Percentage of DecreaseInDeparturesPercent100.0

skyw:GrantContraExpenses

skyw:GrantContraExpenses


Grant
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value-114.144-193.173-3.353-190.2-151.938
Percentage of GrantContraExpenses100.0100.0100.0100.0100.0

skyw:IncreaseInDebtInstrumentFaceAmount us-gaap:DebtInstrument, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

skyw:IncreaseInDebtInstrumentFaceAmount

skyw:PromissoryNote, us-gaap:SubsequentEvent, skyw:PayrollSupportProgramExtensionAgreement


Increase
Period End2021-04-23
Value10
Percentage of IncreaseInDebtInstrumentFaceAmount100.0

skyw:NetUnrealizedDepreciationMarketableSecuritiesNetOfTax

skyw:NetUnrealizedDepreciationMarketableSecuritiesNetOfTax


Net
Period End2020-09-302019-09-302019-06-302019-03-312018-09-302018-06-30
Value-307000.00032000.0-1000.083000.0
Percentage of NetUnrealizedDepreciationMarketableSecuritiesNetOfTax100.00.00.0100.0100.0100.0

skyw:NetUnrealizedDepreciationMarketableSecuritiesNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Net
Period End2020-09-302019-09-302019-06-302019-03-312018-09-302018-06-30
Value-307000.00032000.0-1000.083000.0
Percentage of NetUnrealizedDepreciationMarketableSecuritiesNetOfTax100.00.00.0100.0100.0100.0

skyw:NumberOfDailyDepartures us-gaap:Range, us-gaap:StatementScenario

skyw:NumberOfDailyDepartures

srt:Maximum, srt:ScenarioForecast


Number
Period End2020-07-31
Value2600.0
Percentage of NumberOfDailyDepartures100.0

srt:Minimum, srt:ScenarioForecast


Number
Period End2020-07-31
Value2500.0
Percentage of NumberOfDailyDepartures96.2

skyw:NumberOfDailyDepartures us-gaap:Range, us-gaap:UnusualRiskOrUncertaintyByNature

srt:Minimum, skyw:CoronavirusDisease2019


Number
Period End2020-07-31
Value1200.0
Percentage of NumberOfDailyDepartures46.2

skyw:PaymentOfDebtIssuanceAndLessorInitialDirectCosts

skyw:PaymentOfDebtIssuanceAndLessorInitialDirectCosts


Payment
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value2135000.0133000.01664000.0422000.0767000.053000.0
Percentage of PaymentOfDebtIssuanceAndLessorInitialDirectCosts100.0100.0100.0100.0100.0100.0

skyw:PaymentsForDepositsOnAircraft

skyw:PaymentsForDepositsOnAircraft


Payments
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-30
Value535.09.00.0210.0
Percentage of PaymentsForDepositsOnAircraft100.0100.0100.00.0100.00.0

skyw:PaymentsForFlightEquipmentByIssuanceOfLongTermDebt us-gaap:AircraftType

skyw:PaymentsForFlightEquipmentByIssuanceOfLongTermDebt

skyw:E175


Payments
Period End2020-12-31
Value71
Percentage of PaymentsForFlightEquipmentByIssuanceOfLongTermDebt100.0

skyw:PercentageOfAvailableSeatMilesFlownUnderFixedFeeArrangements

skyw:PercentageOfAvailableSeatMilesFlownUnderFixedFeeArrangements


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-1.686.6-0.20.31.085.9
Percentage of PercentageOfAvailableSeatMilesFlownUnderFixedFeeArrangements100.0100.0100.0100.0100.0100.0

skyw:PercentageOfAvailableSeatMilesFlownUnderProRateArrangements

skyw:PercentageOfAvailableSeatMilesFlownUnderProRateArrangements


Percentage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value1.613.40.2-0.3-1.014.1
Percentage of PercentageOfAvailableSeatMilesFlownUnderProRateArrangements100.0100.0100.0100.0100.0100.0

skyw:PercentageOfFlightsIncreased

skyw:PercentageOfFlightsIncreased


Percentage
Period End2021-06-30
Value129.7
Percentage of PercentageOfFlightsIncreased100.0

skyw:PercentageOfIncreaseInPrincipalAmount us-gaap:DebtInstrument, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

skyw:PercentageOfIncreaseInPrincipalAmount

skyw:PromissoryNote, us-gaap:SubsequentEvent, skyw:PayrollSupportProgram3Agreement


Percentage
Period End2021-04-23
Value30.0
Percentage of PercentageOfIncreaseInPrincipalAmount100.0

skyw:PercentageOfReductionInCompletedBlockHoursOfFlights

skyw:PercentageOfReductionInCompletedBlockHoursOfFlights


Percentage
Period End2021-03-312020-09-30
Value23.041.0
Percentage of PercentageOfReductionInCompletedBlockHoursOfFlights100.0100.0

skyw:PercentageOfReductionInCompletedDeparturesOfFlights

skyw:PercentageOfReductionInCompletedDeparturesOfFlights


Percentage
Period End2021-03-312020-09-30
Value26.037.0
Percentage of PercentageOfReductionInCompletedDeparturesOfFlights100.0100.0

skyw:ProceedsFromReturnOfDepositsOnAircraft

skyw:ProceedsFromReturnOfDepositsOnAircraft


Proceeds
Period End2020-09-302019-09-302016-12-31
Value0.00.0125
Percentage of ProceedsFromReturnOfDepositsOnAircraft0.00.0100.0

skyw:SegmentProfit

skyw:SegmentProfit


Segment
Period End2021-06-302021-03-312020-06-302020-03-31
Value8149-35.32936
Percentage of SegmentProfit100.0100.0100.0100.0

skyw:SegmentProfit us-gaap:StatementBusinessSegments

skyw:SkyWestAirlines


Segment
Period End2021-06-302021-03-312020-06-302020-03-31
Value4415-51.49910
Percentage of SegmentProfit54.531.2145.828.1

skyw:SkywestLeasing


Segment
Period End2021-06-302021-03-312020-06-302020-03-31
Value36341625
Percentage of SegmentProfit45.568.8-45.871.9

skyw:SeveranceCostsGross

skyw:SeveranceCostsGross


Severance
Period End2020-12-31
Value0
Percentage of SeveranceCostsGross0.0

skyw:SharesAwardedPercentageOfOriginalGrants us-gaap:Range, us-gaap:AwardType, us-gaap:PlanName

skyw:SharesAwardedPercentageOfOriginalGrants

srt:Maximum, us-gaap:PerformanceShares, skyw:LongTermIncentivePlan2010


Shares
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0250.0198.002.0002.0
Percentage of SharesAwardedPercentageOfOriginalGrants0.0100.0100.00.0100.00.00.0100.0

skyw:TreasurySharesWithheldForPaymentOfTax

skyw:TreasurySharesWithheldForPaymentOfTax


Treasury
Period End2021-03-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.5736.1650.025189.311-11.608150.010
Percentage of TreasurySharesWithheldForPaymentOfTax100.0100.00.0100.0100.0100.0100.0100.00.0100.0

skyw:TreasurySharesWithheldForPaymentOfTax us-gaap:StatementEquityComponents

us-gaap:TreasuryStock


Treasury
Period End2021-03-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.5736.1650.025189.311-11.608150.010
Percentage of TreasurySharesWithheldForPaymentOfTax100.0100.00.0100.0100.0100.0100.0100.00.0100.0

skyw:TreasurySharesWithheldForPaymentOfTaxes

skyw:TreasurySharesWithheldForPaymentOfTaxes


Treasury
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.01.5730.06.165
Percentage of TreasurySharesWithheldForPaymentOfTaxes0.0100.00.0100.0

skyw:VariableAndShortTermLeaseCost

skyw:VariableAndShortTermLeaseCost


Variable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1056000.01224000.01118000.0950000.01207000.01344000.01068000.01343000.01346000.01475000.01147000.01184000.01392000.01419000.0
Percentage of VariableAndShortTermLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

skyw:WarrantsIssued

skyw:WarrantsIssued


Warrants
Period End2021-06-302021-03-31
Value2513000.03291000.0
Percentage of WarrantsIssued100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value11415-202.505-34.019162202-220.70354-37.224-37.4993.823148
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentInterestRateDuringPeriod us-gaap:StatementScenario, us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

us-gaap:DebtInstrumentInterestRateDuringPeriod

skyw:FinalFiveYears, us-gaap:UnsecuredDebt, skyw:PayrollSupportProgramAgreement


Debt
Period End2020-09-302020-04-30
Value2.00.02
Percentage of DebtInstrumentInterestRateDuringPeriod100.0100.0

skyw:FinalFiveYears, us-gaap:UnsecuredDebt, skyw:PayrollSupportProgramExtensionAgreement


Debt
Period End2021-06-302021-03-31
Value02.0
Percentage of DebtInstrumentInterestRateDuringPeriod0.00.0

skyw:FirstFiveYears, us-gaap:UnsecuredDebt, skyw:PayrollSupportProgramAgreement


Debt
Period End2020-09-302020-04-30
Value1.00.01
Percentage of DebtInstrumentInterestRateDuringPeriod50.050.0

skyw:FirstFiveYears, us-gaap:UnsecuredDebt, skyw:PayrollSupportProgramExtensionAgreement


Debt
Period End2021-06-302021-03-31
Value01.0
Percentage of DebtInstrumentInterestRateDuringPeriod0.00.0

us-gaap:Depreciation dei:LegalEntity, us-gaap:AircraftType, us-gaap:StatementScenario, us-gaap:TypeOfArrangement

us-gaap:Depreciation

skyw:SkyWestAirlinesInc, srt:CRJ200, srt:ScenarioForecast, skyw:DeltaConnectionAgreements


Depreciationdei:
Period End2020-12-31
Value8.5
Percentage of Depreciation100.0

us-gaap:Depreciation dei:LegalEntity, us-gaap:AircraftType, us-gaap:TypeOfArrangement

skyw:SkyWestAirlinesInc, srt:CRJ200, skyw:DeltaConnectionAgreements


Depreciationdei:
Period End2020-09-30
Value20
Percentage of Depreciation0.0

us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate

us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate


Effective
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-06-302011-09-302011-06-30
Value21.00.210.2100.210.210.2100.210.2100.350.3500.350.350.350.350.35
Percentage of EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate100.0100.0100.00.0100.0100.0100.00.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions


Employee
Period End2020-09-302019-09-302019-06-30
Value01500000.01300000.0
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions0.0100.0100.0

us-gaap:FairValueOfAssetsAcquired

us-gaap:FairValueOfAssetsAcquired


Fair
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302018-09-302018-06-302018-03-312017-06-302017-03-31
Value101.38-4.991-20.578340.4189.92-0.1480.5740.3341.704
Percentage of FairValueOfAssetsAcquired100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments us-gaap:IncomeStatementLocation, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:OtherNonoperatingIncomeExpense, us-gaap:CorporateJointVenture


Income
Period End2021-06-302021-03-31
Value100000.0200000.0
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:CorporateJointVenture


Income
Period End2020-12-31
Value400000.0
Percentage of IncomeLossFromEquityMethodInvestments0.0

us-gaap:InvestmentIncomeInterest

us-gaap:InvestmentIncomeInterest


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.210.2840.2271.4031.6852.5643.053.5423.7313.8073.1312.2831.7051.7051.1111.4081.330.660.6370.5910.4850.430.350.3110.6970.640.4882.5490.5110.5480.5250.5670.871.7271.8792.0532.0431.9541.9412.2152.1141.9663.4542.814.142
Percentage of InvestmentIncomeInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LaborAndRelatedExpense

us-gaap:LaborAndRelatedExpense


Labor
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value233219212194170249248251243257299301293306296303295300295305304305297304298302313315310317306306300297293297290290290288290286227185173
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeaseCost

us-gaap:LeaseCost


Lease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2122212223242326282845434654
Percentage of LeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2222222324252325272744424552
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseLeaseIncomeLeasePayments

us-gaap:OperatingLeaseLeaseIncomeLeasePayments


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value16147.6297.1369.48510109.0169.058
Percentage of OperatingLeaseLeaseIncomeLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-302021-03-312020-12-31
Value241622
Percentage of OperatingLeasePayments100.0100.0100.0

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent


Other
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-307000.0307000.000032000.0-14000.0-2000.084000.0-50000.0-46000.011000.017000.039000.0-28000.0-11000.0213000.015000.0-210000.0161000.0-223000.0301000.0-562000.0-222000.042000.023000.0124000.0363000.0-563000.063000.0-220000.088000.035000.0412000.0181000.0-289000.0333000.0309000.0
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax


Other
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312012-03-312011-03-31
Value-99000.099000.000010000.0-5000.0027000.016000.0263000.0198000.0
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax100.0100.00.00.00.0100.0100.00.0100.0100.0100.0100.0

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherCostAndExpenseOperating


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value585455593869595961636668696870787575247779742478797760686965615956615958575460615859564038
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNonoperatingIncome

us-gaap:OtherNonoperatingIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-03-312015-09-30
Value0.080.2160.4050.4020.3980.3610.281463.5581.07
Percentage of OtherNonoperatingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForFlightEquipment

us-gaap:PaymentsForFlightEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value11512559.225877316193128197213294355198974929322051930521994631432442581741812316632252617227.609121467621216
Percentage of PaymentsForFlightEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-12.56867-31.6098620133.437-5.6085.066-7.02834-2.4833.5981.3645.885-1.0793.6732.425-9.2530.657-0.6652.164
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.01.60.00.00.06.20.00.00.09.30.00.10.013-9.380.50.03.8
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation0.0100.00.00.00.0100.00.00.00.0100.00.0100.00.0100.0100.0100.00.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value466332498373238236469572398498732198989387531264282455
Percentage of PaymentsToAcquireAvailableForSaleSecuritiesDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromIssuanceOfCommonStock


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.01.7450.01.2870.01.5320.0011.732.2792.2610.02.8920.02.321.2131.6640.3021.481-2.0726.1662.0422.0062.9633.070.9912.73-1.1391.8980.0791.854-0.1251.8440.0282.6382.1551.915-0.0752.2360.0022.2410.0022.2010.0192.384
Percentage of ProceedsFromIssuanceOfCommonStock0.0100.00.0100.00.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfDebt us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

us-gaap:ProceedsFromIssuanceOfDebt

us-gaap:SubsequentEvent, skyw:PayrollSupportProgram3Agreement


Proceeds
Period End2021-04-23
Value125
Percentage of ProceedsFromIssuanceOfDebt100.0

us-gaap:ProceedsFromIssuanceOfDebt us-gaap:TypeOfArrangement

skyw:PayrollSupportProgramAgreement


Proceeds
Period End2020-12-312020-06-30
Value3.4306
Percentage of ProceedsFromIssuanceOfDebt0.00.0

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value461337292279217381300605355605752291910496596178282383
Percentage of ProceedsFromSaleOfAvailableForSaleSecuritiesDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-12-312016-12-312015-12-312015-09-302014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.1322.151.6270.2460.01.3660.4044.539210.0430.9151.164.5370.0526.0053.4650.0230.1680.0120.09113.00.00.630.0020.00.0810.110.0090.024
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForDoubtfulAccounts


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value1.30.36.577190.5523.756
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value044.8700061.45-0.080.28048.4500053.40
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0100.00.00.00.0100.0100.0100.00.0100.00.00.00.0100.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:TitleOfIndividual

srt:Director


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value044.8700061.4500
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0100.00.00.00.0100.0-0.00.0

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation

us-gaap:TreasuryStock


Shares
Period End2021-03-312020-03-312019-12-312019-09-302019-06-302019-03-312018-03-31
Value42000.0108000.0000173000.0238000.0
Percentage of SharesPaidForTaxWithholdingForShareBasedCompensation100.0100.00.00.00.0100.0100.0

us-gaap:StockAndWarrantsIssuedDuringPeriodValuePreferredStockAndWarrants

us-gaap:StockAndWarrantsIssuedDuringPeriodValuePreferredStockAndWarrants


Stock
Period End2021-06-302021-03-312020-06-30
Value2513000.03291000.02845000.0
Percentage of StockAndWarrantsIssuedDuringPeriodValuePreferredStockAndWarrants100.0100.0100.0

us-gaap:StockAndWarrantsIssuedDuringPeriodValuePreferredStockAndWarrants us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-06-30
Value2513000.03291000.02845000.0
Percentage of StockAndWarrantsIssuedDuringPeriodValuePreferredStockAndWarrants100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans

us-gaap:CommonStock


Stock
Period End2021-03-312020-09-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value30000.041000.024000.0027000.0039000.0031000.0030000.0
Percentage of StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans100.0100.0100.00.0100.00.0100.00.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised

us-gaap:CommonStock


Stock
Period End2021-03-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value177000.0287000.0013000.0172000.0521000.00103000.00677000.0
Percentage of StockIssuedDuringPeriodSharesStockOptionsExercised100.0100.00.0100.0100.0100.00.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan


Stock
Period End2021-03-312020-09-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1139000.01287000.01494000.001545000.001620000.001553000.001485000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.0100.00.0100.00.0100.00.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stock
Period End2021-03-312020-09-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1139000.01287000.01494000.001545000.001620000.001553000.001485000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.0100.00.0100.00.0100.00.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2.8772.6132.0932.0871.7272.2642.0092.075-0.578-8.1892.7312.7784.854
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2.8772.6132.0932.0871.7272.2642.0092.075-0.578-8.1892.7312.7784.854
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised


Stock
Period End2021-03-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value606000.038000.01000.0185000.02279000.0641000.001338000.00836000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.0100.0100.00.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stock
Period End2021-03-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value606000.038000.01000.0185000.02279000.0641000.001338000.00836000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.0100.0100.00.0100.00.0100.0

us-gaap:StockRepurchasedDuringPeriodValue

us-gaap:StockRepurchasedDuringPeriodValue


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-12-312015-09-302014-12-312014-09-30
Value0.00.00.02010.025342529150.010.010.00.00.010.00.00.00.00.0
Percentage of StockRepurchasedDuringPeriodValue0.00.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.0100.00.00.00.00.0

us-gaap:SubleaseIncome

us-gaap:SubleaseIncome


Sublease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value1493000.01335000.01586000.01587000.01560000.01571000.01079000.0357000.0
Percentage of SubleaseIncome100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberOfSharesRestrictedStock

us-gaap:WeightedAverageNumberOfSharesRestrictedStock


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-302013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302011-09-302011-06-30
Value379000.0441000.0441000.0-133000.0282000.0-14000.0383000.0332000.0658000.0-17000.0942000.0867000.01112000.010000.01247000.01226000.01382000.0844000.0776000.0796000.09000.0666000.0614000.0935000.0714000.024000.0729000.0666000.070000.0912000.0845000.0745000.0673000.0
Percentage of WeightedAverageNumberOfSharesRestrictedStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:EntityNumberOfEmployees us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

dei:EntityNumberOfEmployees

us-gaap:NumberOfEmployeesTotal, us-gaap:LaborForceConcentrationRisk


Entity
Period End2020-12-31
Value12502.0
Percentage of EntityNumberOfEmployees100.0

skyw:AssetsNoncurrentExcludingPropertyPlantAndEquipment

skyw:AssetsNoncurrentExcludingPropertyPlantAndEquipment


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value5765825425735004985024905094882862572782722802532792832682803113253149610210997101125127116121126128109108117123117129137134
Percentage of AssetsNoncurrentExcludingPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

skyw:BuildingsAndGroundEquipmentGross

skyw:BuildingsAndGroundEquipmentGross


Buildings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value252253258243246244265248240270291297285275265246271272261254264260275273282272274283288301279279275272274280294291291287282278
Percentage of BuildingsAndGroundEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

skyw:CashAndCashEquivalentsAndAvailableForSaleSecurities

skyw:CashAndCashEquivalentsAndAvailableForSaleSecurities


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value825520689685556489547657
Percentage of CashAndCashEquivalentsAndAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0

skyw:CashAndMarketableSecurities

skyw:CashAndMarketableSecurities


Cash
Period End2021-06-302021-03-312020-12-312020-09-30
Value955836825822
Percentage of CashAndMarketableSecurities100.0100.0100.0100.0

skyw:CashCashEquivalentsAndAvailableForSaleSecuritiesAmortizedCost us-gaap:FairValueByMeasurementFrequency

skyw:CashCashEquivalentsAndAvailableForSaleSecuritiesAmortizedCost

us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value955836825821761577520571549544689704649645685667626578556555504434489556493548
Percentage of CashCashEquivalentsAndAvailableForSaleSecuritiesAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

skyw:CashCashEquivalentsAndRestrictedCashFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

skyw:CashCashEquivalentsAndRestrictedCashFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-06-302021-03-312020-12-312019-12-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value34523121587328175251181106151103155582362542111381821021431628294182287160162153155128118148134
Percentage of CashCashEquivalentsAndRestrictedCashFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

skyw:CashCashEquivalentsAndRestrictedCashFairValueDisclosure us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-06-302021-03-312020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value34523121587328181155211143
Percentage of CashCashEquivalentsAndRestrictedCashFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0

skyw:ContractualObligationDueAfterFourthYear

skyw:ContractualObligationDueAfterFourthYear


Contractual
Period End2021-06-302021-03-31
Value14771414
Percentage of ContractualObligationDueAfterFourthYear100.0100.0

skyw:DebtInstrumentCarryingAmountCurrent

skyw:DebtInstrumentCarryingAmountCurrent


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value364360-406.005364312368-367.954366349366-354.072361357339-313.243307310297308303280272
Percentage of DebtInstrumentCarryingAmountCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

skyw:DebtInstrumentCarryingAmountNoncurrent

skyw:DebtInstrumentCarryingAmountNoncurrent


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value268127792829273726842558264926422739275535427732637246223992402247523432261194417811676
Percentage of DebtInstrumentCarryingAmountNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

skyw:DeferredGrantContraExpenses us-gaap:TypeOfArrangement

skyw:DeferredGrantContraExpenses

skyw:PayrollSupportProgramAgreement


Deferred
Period End2020-09-30
Value3400000.0
Percentage of DeferredGrantContraExpenses100.0

skyw:FixedInterestDebtPercent

skyw:FixedInterestDebtPercent


Fixed
Period End2021-03-31
Value98.1
Percentage of FixedInterestDebtPercent100.0

skyw:InterestCommitment

skyw:InterestCommitment


Interest
Period End2021-06-302021-03-312020-09-30
Value493522541
Percentage of InterestCommitment100.0100.0100.0

skyw:InterestCommitmentDueAfterYearFive

skyw:InterestCommitmentDueAfterYearFive


Interest
Period End2020-09-30
Value147
Percentage of InterestCommitmentDueAfterYearFive100.0

skyw:InterestCommitmentDueAfterYearFour

skyw:InterestCommitmentDueAfterYearFour


Interest
Period End2021-06-302021-03-31
Value111105
Percentage of InterestCommitmentDueAfterYearFour100.0100.0

skyw:InterestCommitmentDueInNextTwelveMonths

skyw:InterestCommitmentDueInNextTwelveMonths


Interest
Period End2021-06-302021-03-31
Value106106
Percentage of InterestCommitmentDueInNextTwelveMonths100.0100.0

skyw:InterestCommitmentDueInYearFive

skyw:InterestCommitmentDueInYearFive


Interest
Period End2020-09-30
Value67
Percentage of InterestCommitmentDueInYearFive100.0

skyw:InterestCommitmentDueInYearFour

skyw:InterestCommitmentDueInYearFour


Interest
Period End2021-06-302021-03-312020-09-30
Value575782
Percentage of InterestCommitmentDueInYearFour100.0100.0100.0

skyw:InterestCommitmentDueInYearThree

skyw:InterestCommitmentDueInYearThree


Interest
Period End2021-06-302021-03-312020-09-30
Value727399
Percentage of InterestCommitmentDueInYearThree100.0100.0100.0

skyw:InterestCommitmentDueInYearTwo

skyw:InterestCommitmentDueInYearTwo


Interest
Period End2021-06-302021-03-312020-09-30
Value8889114
Percentage of InterestCommitmentDueInYearTwo100.0100.0100.0

skyw:InterestCommitmentFutureMinimumPaymentsRemainderOfFiscalYear

skyw:InterestCommitmentFutureMinimumPaymentsRemainderOfFiscalYear


Interest
Period End2021-06-302021-03-312020-09-30
Value589028
Percentage of InterestCommitmentFutureMinimumPaymentsRemainderOfFiscalYear100.0100.0100.0

skyw:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour

skyw:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour


Lessee
Period End2021-06-302021-03-31
Value8383
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour100.0100.0

skyw:LettersOfCreditAndSuretyBondOutstandingAmount

skyw:LettersOfCreditAndSuretyBondOutstandingAmount


Letters
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value6161788787887988
Percentage of LettersOfCreditAndSuretyBondOutstandingAmount100.0100.0100.0100.0100.0100.0100.0100.0

skyw:LiquidAssets

skyw:LiquidAssets


Liquid
Period End2021-06-302021-03-312020-12-312020-09-30
Value996154215301374
Percentage of LiquidAssets100.0100.0100.0100.0

skyw:LiquidAssets us-gaap:DebtInstrument, us-gaap:UnusualOrInfrequentItem

skyw:SecuredTermLoan, skyw:CoronavirusDisease2019


Liquid
Period End2021-03-312020-09-30
Value665513
Percentage of LiquidAssets43.137.3

skyw:LiquidAssets us-gaap:LongtermDebtType, us-gaap:UnusualOrInfrequentItem

skyw:SecuredTermLoan, skyw:CoronavirusDisease2019


Liquid
Period End2020-12-31
Value665
Percentage of LiquidAssets43.5

skyw:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour

skyw:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour


Long
Period End2021-06-302021-03-31
Value12811225
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFour100.0100.0

skyw:LongTermReceivablesAndOtherAssets

skyw:LongTermReceivablesAndOtherAssets


Long
Period End2021-06-302021-03-312020-12-31
Value314308260
Percentage of LongTermReceivablesAndOtherAssets100.0100.0100.0

skyw:NumberOfDailyDeparturesToDifferentDestinations

skyw:NumberOfDailyDeparturesToDifferentDestinations


Number
Period End2020-12-31
Value1770.0
Percentage of NumberOfDailyDeparturesToDifferentDestinations100.0

skyw:PercentageOfVariableRateNotes

skyw:PercentageOfVariableRateNotes


Percentage
Period End2020-09-30
Value2.4
Percentage of PercentageOfVariableRateNotes100.0

us-gaap:AccountsAndOtherReceivablesNetCurrent

us-gaap:AccountsAndOtherReceivablesNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value55433432423782778064
Percentage of AccountsAndOtherReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableGrossCurrent

us-gaap:AccountsReceivableGrossCurrent


Accounts
Period End2020-12-31
Value56
Percentage of AccountsReceivableGrossCurrent100.0

us-gaap:AccountsReceivableGrossCurrent us-gaap:BalanceSheetLocation

skyw:CurrentAssets


Accounts
Period End2021-06-302021-03-312020-09-30
Value776549
Percentage of AccountsReceivableGrossCurrent0.00.00.0

us-gaap:AccountsReceivableGrossNoncurrent

us-gaap:AccountsReceivableGrossNoncurrent


Accounts
Period End2020-12-31
Value157
Percentage of AccountsReceivableGrossNoncurrent100.0

us-gaap:AccountsReceivableGrossNoncurrent us-gaap:BalanceSheetLocation

us-gaap:OtherNoncurrentAssets


Accounts
Period End2021-06-302021-03-312020-09-30
Value223219171
Percentage of AccountsReceivableGrossNoncurrent0.00.00.0

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent

us-gaap:AccrualForTaxesOtherThanIncomeTaxesCurrent


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value282626332014151816131621161619231715152418151722201517231813192019162222181721242225
Percentage of AccrualForTaxesOtherThanIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AirlineRelatedInventoryNet

us-gaap:AirlineRelatedInventoryNet


Airline
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value9795919297104110111109112127124118117119121118119118142140140140140139139137150145143138132129119113113114118115113112106
Percentage of AirlineRelatedInventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AirlineRelatedInventoryValuationReserves

us-gaap:AirlineRelatedInventoryValuationReserves


Airline
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value19152217401311109.28.27.5
Percentage of AirlineRelatedInventoryValuationReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivable


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4445463919190.0180.1580.1570.1730.18730.32660.0940.0940.240.047
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure

us-gaap:AssetsFairValueDisclosure


Assets
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value825520689685556
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value34523121541845228987307253290328324175261181106151103155582362542111381821021431628294182287160162153155128118148134
Percentage of AssetsFairValueDisclosure0.00.026.10.00.00.016.80.00.00.047.60.00.00.026.50.00.00.027.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value609605610403309288432263295253360380473383503569482482409506276187286429322377415392384447487440505468556583501464497670
Percentage of AssetsFairValueDisclosure0.00.073.90.00.00.083.20.00.00.052.40.00.00.073.40.00.00.073.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value955836825822762577520571549544689685564500561
Percentage of AssetsFairValueDisclosure0.00.0100.00.00.00.0100.00.00.00.0100.0100.0101.50.00.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis


Available
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value610432360503410286415489559501675
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:FinancialInstrument

us-gaap:CommercialPaper


Available
Period End2020-12-312019-12-312018-12-312017-12-31
Value492165131159
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis80.738.336.331.6

us-gaap:CorporateBondSecurities


Available
Period End2020-12-312019-12-312018-12-312017-12-31
Value117267229344
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis19.361.763.768.4

us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:AvailableForSaleSecuritiesDebtSecurities


Available
Period End2020-12-312019-12-312018-12-312017-12-31
Value610432360503
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FinancialInstrument

us-gaap:CommercialPaper


Available
Period End2020-12-312019-12-312018-12-312017-12-31
Value492165131159
Percentage of AvailableForSaleSecuritiesDebtSecurities80.738.336.331.6

us-gaap:CorporateBondSecurities


Available
Period End2020-12-312019-12-312018-12-312017-12-31
Value117267229344
Percentage of AvailableForSaleSecuritiesDebtSecurities19.361.763.768.4

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value609605610403309288432360503187286429322377415392384447487440505468556583501464497670
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-03-312015-12-312015-09-302015-06-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value609605610403309288432360503187286429322415392384447487440505468556583501464497670
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialPaper


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312018-06-302018-03-312017-12-31
Value528513492308172108165131267158159
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent86.784.880.776.455.737.638.336.30.00.031.6

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateBondSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312018-06-302018-03-312017-12-31
Value809211795137179267229206225344
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent13.315.219.323.644.362.461.763.70.00.068.4

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312015-12-31
Value609605610403309288432360503286
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialPaper


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-31
Value528513492308172108165131159
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent86.784.880.776.455.737.638.336.331.6

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateBondSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-31
Value809211795137179267229344
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent13.315.219.323.644.362.461.763.768.4

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value41845228987307253290328324181
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value41845228987307253290328
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1

us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1


Class
Period End2021-06-30
Value57.47
Percentage of ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1100.0

us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 us-gaap:ClassOfWarrantOrRight, us-gaap:TypeOfArrangement

skyw:WarrantShares, skyw:PayrollSupportProgram3Agreement


Class
Period End2021-06-30
Value57.47
Percentage of ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1100.0

us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 us-gaap:DebtInstrument

skyw:PromissoryNoteCaresActPayrollSupportProgram


Class
Period End2021-03-312020-12-312020-09-30
Value40.4128.3828.38
Percentage of ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights10.00.00.0

us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 us-gaap:DebtInstrument, us-gaap:SubsequentEventType

skyw:PromissoryNoteCaresActPayrollSupportProgram, us-gaap:SubsequentEvent


Class
Period End2020-07-31
Value28.38
Percentage of ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights10.0

us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 us-gaap:LongtermDebtType

skyw:SecuredTermLoan


Class
Period End2020-12-31
Value28.38
Percentage of ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights10.0

us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

us-gaap:SubsequentEvent, skyw:WarrantAgreementAndWarrants


Class
Period End2021-01-15
Value40.41
Percentage of ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights10.0

us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights us-gaap:DebtInstrument

us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights

skyw:SecuredTermLoan


Class
Period End2020-12-31
Value211420.0
Percentage of ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights100.0

us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights us-gaap:DebtInstrument, us-gaap:SubsequentEventType

skyw:PayrollSupportProgram, us-gaap:SubsequentEvent


Class
Period End2020-07-31
Value138910.0
Percentage of ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights0.0

skyw:PromissoryNoteCaresActPayrollSupportProgram, us-gaap:SubsequentEvent


Class
Period End2020-07-31
Value138910.0
Percentage of ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights0.0

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiability


Contract
Period End2021-06-302021-03-312020-09-30
Value13713198
Percentage of ContractWithCustomerLiability100.0100.0100.0

us-gaap:ContractWithCustomerLiability us-gaap:TypeOfArrangement

skyw:CapacityPurchaseAgreements


Contract
Period End2021-06-302020-06-30
Value2669
Percentage of ContractWithCustomerLiability19.50.0

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:ContractWithCustomerLiabilityNoncurrent


Contract
Period End2021-06-302021-03-312018-09-302018-06-302018-03-312017-12-31
Value7711234363744
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.0100.0

us-gaap:ContractualObligation

us-gaap:ContractualObligation


Contractual
Period End2021-06-302021-03-312020-09-30
Value466045694679
Percentage of ContractualObligation100.0100.0100.0

us-gaap:ContractualObligationDueInFifthYear

us-gaap:ContractualObligationDueInFifthYear


Contractual
Period End2020-09-30
Value1753
Percentage of ContractualObligationDueInFifthYear100.0

us-gaap:ContractualObligationDueInFourthYear

us-gaap:ContractualObligationDueInFourthYear


Contractual
Period End2021-06-302021-03-312020-09-30
Value461521446
Percentage of ContractualObligationDueInFourthYear100.0100.0100.0

us-gaap:ContractualObligationDueInNextTwelveMonths

us-gaap:ContractualObligationDueInNextTwelveMonths


Contractual
Period End2021-06-302021-03-312020-09-30
Value869649726
Percentage of ContractualObligationDueInNextTwelveMonths100.0100.0100.0

us-gaap:ContractualObligationDueInSecondYear

us-gaap:ContractualObligationDueInSecondYear


Contractual
Period End2021-06-302021-03-312020-09-30
Value611579967
Percentage of ContractualObligationDueInSecondYear100.0100.0100.0

us-gaap:ContractualObligationDueInThirdYear

us-gaap:ContractualObligationDueInThirdYear


Contractual
Period End2021-06-302021-03-312020-09-30
Value473474550
Percentage of ContractualObligationDueInThirdYear100.0100.0100.0

us-gaap:ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear

us-gaap:ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear


Contractual
Period End2021-06-302021-03-312020-09-30
Value766931234
Percentage of ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount

us-gaap:DebtInstrumentCarryingAmount


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value30453140323631012996292730173008308831213185313429942801271227102786264025702248206119591948
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:LongtermDebtType

skyw:LongTermDebtObligationsPrimarilyRelatedToAcquisitionOfAircraftAndCertainSpareEngines


Debt
Period End2020-12-312019-12-31
Value30703020
Percentage of DebtInstrumentCarryingAmount94.9100.1

skyw:NotesPayableToBanksInterestRatesRangeFive


Debt
Period End2020-12-312018-12-312017-12-312016-12-312015-12-31
Value13371372426479
Percentage of DebtInstrumentCarryingAmount0.411.713.716.624.6

skyw:NotesPayableToBanksInterestRatesRangeFour


Debt
Period End2020-12-312019-12-312016-12-312015-12-31
Value261825378.85417
Percentage of DebtInstrumentCarryingAmount80.984.10.30.9

skyw:NotesPayableToBanksInterestRatesRangeOne


Debt
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value6.205186.4293463108
Percentage of DebtInstrumentCarryingAmount0.20.60.21.32.55.6

skyw:NotesPayableToBanksInterestRatesRangeThree


Debt
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value42422416386108
Percentage of DebtInstrumentCarryingAmount13.10.71.32.33.35.5

skyw:NotesPayableToBanksInterestRatesRangeTwo


Debt
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value7.608183697146217
Percentage of DebtInstrumentCarryingAmount0.20.61.13.65.711.2

skyw:NotesPayableToUsGovernmentInterestRateRangeOne


Debt
Period End2020-12-31
Value60
Percentage of DebtInstrumentCarryingAmount1.9

skyw:NotesPayableToUsGovernmentInterestRateRangeTwo


Debt
Period End2020-12-31
Value105
Percentage of DebtInstrumentCarryingAmount3.3

skyw:SecuredTermLoan


Debt
Period End2020-12-31
Value60
Percentage of DebtInstrumentCarryingAmount1.9

us-gaap:DebtInstrumentFaceAmount us-gaap:BalanceSheetLocation, us-gaap:TypeOfArrangement

us-gaap:DebtInstrumentFaceAmount

us-gaap:OtherNoncurrentLiabilities, skyw:PayrollSupportProgram3Agreement


Debt
Period End2021-06-30
Value115
Percentage of DebtInstrumentFaceAmount100.0

us-gaap:DebtInstrumentFaceAmount us-gaap:DebtInstrument

skyw:PromissoryNoteCaresActPayrollSupportProgram


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value953910510562
Percentage of DebtInstrumentFaceAmount82.70.00.00.00.0

us-gaap:DebtInstrumentFaceAmount us-gaap:DebtInstrument, us-gaap:SubsequentEventType

skyw:PayrollSupportProgram, us-gaap:SubsequentEvent


Debt
Period End2020-07-31
Value39
Percentage of DebtInstrumentFaceAmount0.0

us-gaap:DebtInstrumentFaceAmount us-gaap:DebtInstrument, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

skyw:PromissoryNote, us-gaap:SubsequentEvent, skyw:PayrollSupportProgram3Agreement


Debt
Period End2021-04-23
Value7.5
Percentage of DebtInstrumentFaceAmount0.0

us-gaap:DebtInstrumentFaceAmount us-gaap:IncomeStatementLocation, us-gaap:TypeOfArrangement

us-gaap:OperatingExpense, skyw:PayrollSupportProgram3Agreement


Debt
Period End2021-06-30
Value89
Percentage of DebtInstrumentFaceAmount77.8

us-gaap:DebtInstrumentFaceAmount us-gaap:LongtermDebtType, us-gaap:TypeOfArrangement

us-gaap:UnsecuredDebt, skyw:PayrollSupportProgram3Agreement


Debt
Period End2021-06-30
Value45
Percentage of DebtInstrumentFaceAmount39.0

us-gaap:UnsecuredDebt, skyw:PayrollSupportProgramAgreement


Debt
Period End2020-12-312020-09-302020-04-30
Value105105101
Percentage of DebtInstrumentFaceAmount0.00.00.0

us-gaap:UnsecuredDebt, skyw:PayrollSupportProgramExtensionAgreement


Debt
Period End2021-06-302021-03-31
Value5039
Percentage of DebtInstrumentFaceAmount43.70.0

us-gaap:DebtInstrumentFaceAmount us-gaap:ProductOrService, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

us-gaap:Grant, us-gaap:SubsequentEvent, skyw:PayrollSupportProgramExtensionAgreement


Debt
Period End2021-04-23
Value35
Percentage of DebtInstrumentFaceAmount0.0

us-gaap:DebtInstrumentFaceAmount us-gaap:ProductOrService, us-gaap:TypeOfArrangement

us-gaap:Grant, skyw:PayrollSupportProgram3Agreement


Debt
Period End2021-06-30
Value205
Percentage of DebtInstrumentFaceAmount177.8

us-gaap:Grant, skyw:PayrollSupportProgramAgreement


Debt
Period End2020-12-312020-09-302020-04-30
Value345345336
Percentage of DebtInstrumentFaceAmount0.00.00.0

us-gaap:Grant, skyw:PayrollSupportProgramExtensionAgreement


Debt
Period End2021-06-302021-03-31
Value217193
Percentage of DebtInstrumentFaceAmount188.80.0

us-gaap:DebtInstrumentFaceAmount us-gaap:Range, us-gaap:DebtInstrument, us-gaap:SubsequentEventType

srt:Maximum, skyw:PromissoryNote, us-gaap:SubsequentEvent


Debt
Period End2021-01-15
Value39
Percentage of DebtInstrumentFaceAmount0.0

us-gaap:DebtInstrumentFaceAmount us-gaap:Range, us-gaap:DebtInstrument, us-gaap:TypeOfArrangement

srt:Maximum, skyw:PromissoryNote, skyw:PayrollSupportProgram3Agreement


Debt
Period End2021-03-31
Value45
Percentage of DebtInstrumentFaceAmount0.0

us-gaap:DebtInstrumentFaceAmount us-gaap:StatementScenario, us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

srt:ScenarioForecast, us-gaap:SubsequentEvent, skyw:PayrollSupportProgram3Agreement


Debt
Period End2021-06-30
Value250
Percentage of DebtInstrumentFaceAmount216.8

us-gaap:DebtInstrumentFaceAmount us-gaap:SubsequentEventType, us-gaap:TypeOfArrangement

us-gaap:SubsequentEvent, skyw:PayrollSupportProgramExtensionAgreement


Debt
Period End2021-01-15
Value233
Percentage of DebtInstrumentFaceAmount0.0

us-gaap:DebtInstrumentFaceAmount us-gaap:TypeOfArrangement

skyw:PayrollSupportProgram3Agreement


Debt
Period End2021-06-30
Value250
Percentage of DebtInstrumentFaceAmount216.8

skyw:PayrollSupportProgramExtensionAgreement


Debt
Period End2021-06-302021-03-31
Value268233
Percentage of DebtInstrumentFaceAmount232.50.0

us-gaap:DebtInstrumentInterestRateEffectivePercentage

us-gaap:DebtInstrumentInterestRateEffectivePercentage


Debt
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value4.04.20.0420.0390.0380.037
Percentage of DebtInstrumentInterestRateEffectivePercentage100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsCurrentNet

us-gaap:DeferredFinanceCostsCurrentNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value3461000.03380000.03847000.03905000.03379000.03979000.03828000.03666000.03765000.03786000.03866000.03804000.03722000.03629000.03565000.03609000.03620000.03485000.0
Percentage of DeferredFinanceCostsCurrentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredFinanceCostsNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value323432332325242324242525252525252625
Percentage of DeferredFinanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value95010329556661022902895824823789733
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsDeferredIncome


Deferred
Period End2020-12-31
Value27
Percentage of DeferredTaxAssetsDeferredIncome100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value324410447258465261329255291291
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value229358344122286821528511812870
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value129.114355360555344484942
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1920323148474340403530
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value3417182647242730312422
Percentage of DeferredTaxAssetsTaxDeferredExpenseOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value95010329556661022902895824823789733
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepositsOnFlightEquipment

us-gaap:DepositsOnFlightEquipment


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312011-09-302011-06-302010-12-31
Value903631404048485050374227494949492127383838383834374040404040406.75130.4
Percentage of DepositsOnFlightEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value141122125113108112133129127118161150160145154149146133139140143131138134138133138133131124133126125117121119117110112105110112
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

skyw:RestrictedStockAndPerformanceShares


Employee
Period End2020-12-31
Value9200000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0

us-gaap:EquityMethodInvestmentOwnershipPercentage us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:EquityMethodInvestmentOwnershipPercentage

us-gaap:CorporateJointVenture


Equity
Period End2020-12-312019-12-312019-09-302019-06-30
Value75.00.750.750.75
Percentage of EquityMethodInvestmentOwnershipPercentage100.0100.0100.0100.0

us-gaap:EquityMethodInvestments us-gaap:BalanceSheetLocation, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:EquityMethodInvestments

us-gaap:OtherAssets, us-gaap:CorporateJointVenture


Equity
Period End2021-06-302021-03-31
Value2525
Percentage of EquityMethodInvestments100.0100.0

us-gaap:EquityMethodInvestments us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:CorporateJointVenture


Equity
Period End2020-12-312020-09-30
Value2525
Percentage of EquityMethodInvestments0.00.0

us-gaap:FlightEquipmentGross

us-gaap:FlightEquipmentGross


Flight
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value761375877527727472737203707869036817669664336229592955835335525252025002483958195528532552425193506048364608450443464121408040494029401439973992398639863973391038593836
Percentage of FlightEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GrantsReceivable us-gaap:TypeOfArrangement

us-gaap:GrantsReceivable

skyw:PayrollSupportProgramAgreement


Grants
Period End2020-12-312020-09-302020-04-30
Value450450438
Percentage of GrantsReceivable100.0100.0100.0

us-gaap:IncomeTaxesReceivable

us-gaap:IncomeTaxesReceivable


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312014-06-302014-03-312013-12-312012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3.9163.5571818112423212518118.5965.3166.9894.3071.6772.772.8710.3931.3782.7791.0046.3660.840.2852.0951.5684.3297.6783.356
Percentage of IncomeTaxesReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value79798585
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value4570224975173654
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceived

us-gaap:LessorOperatingLeasePaymentsToBeReceived


Lessor
Period End2021-06-302021-03-312020-12-312020-09-30
Value349361366169
Percentage of LessorOperatingLeasePaymentsToBeReceived100.0100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFiveYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFiveYears


Lessor
Period End2020-12-312020-09-30
Value3970
Percentage of LessorOperatingLeasePaymentsToBeReceivedFiveYears100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFourYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFourYears


Lessor
Period End2021-06-302021-03-312020-12-312020-09-30
Value39394221
Percentage of LessorOperatingLeasePaymentsToBeReceivedFourYears100.0100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths


Lessor
Period End2021-06-302021-03-312020-12-312020-09-30
Value45454324
Percentage of LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths100.0100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear

us-gaap:LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear


Lessor
Period End2021-06-302021-03-312020-09-30
Value22346.17
Percentage of LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThreeYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThreeYears


Lessor
Period End2021-06-302021-03-312020-12-312020-09-30
Value42424221
Percentage of LessorOperatingLeasePaymentsToBeReceivedThreeYears100.0100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedTwoYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedTwoYears


Lessor
Period End2021-06-302021-03-312020-12-312020-09-30
Value44444324
Percentage of LessorOperatingLeasePaymentsToBeReceivedTwoYears100.0100.0100.0100.0

us-gaap:LettersOfCreditOutstandingAmount

us-gaap:LettersOfCreditOutstandingAmount


Letters
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value358.89.7146.5
Percentage of LettersOfCreditOutstandingAmount100.0100.0100.0100.0100.0

us-gaap:LineOfCredit us-gaap:ShortTermDebtType

us-gaap:LineOfCredit

skyw:LettersOfCreditAndSuretyBonds


Line
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value59596164616161
Percentage of LineOfCredit100.0100.0100.0100.0100.0100.0100.0

us-gaap:LetterOfCredit


Line
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value3434358.88.872807884878787858487876.56.8
Percentage of LineOfCredit57.157.154.514.214.20.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity

us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity


Line
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312017-12-312016-12-31
Value4141393966656068
Percentage of LineOfCreditFacilityCurrentBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity us-gaap:DebtInstrument

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

skyw:SecuredTermLoan


Line
Period End2020-10-282020-09-30
Value725573
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0100.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity us-gaap:DebtInstrument, us-gaap:SubsequentEventType

skyw:SecuredTermLoan, us-gaap:SubsequentEvent


Line
Period End2020-10-28
Value725
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity us-gaap:LongtermDebtType

skyw:SecuredTermLoan


Line
Period End2020-10-282020-09-30
Value725573
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0100.0

us-gaap:LineOfCredit


Line
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value757575757575752525
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity0.00.00.00.00.00.00.00.00.0

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity


Line
Period End2021-06-302021-03-312020-12-312020-09-30
Value41413939
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity100.0100.0100.0100.0

us-gaap:LongTermDebtFairValue

us-gaap:LongTermDebtFairValue


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value32443049315726982566193918131509174419521926
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtFairValue us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-03-31
Value290031003200310031002960299029803060310031603150300027902700272028002640257022302049193419392129208719621813170616051507150915741651171217441744
Percentage of LongTermDebtFairValue0.00.098.60.00.00.098.10.00.00.0100.10.00.00.0100.10.00.00.0100.10.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive


Long
Period End2020-12-31
Value1184
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths


Long
Period End2021-06-302021-03-312020-12-312020-09-30
Value407407406387
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive


Long
Period End2020-12-312020-09-30
Value4471507
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour


Long
Period End2021-06-302021-03-312020-12-312020-09-30
Value386446372351
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree


Long
Period End2021-06-302021-03-312020-12-312020-09-30
Value371371418397
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2021-06-302021-03-312020-12-312020-09-30
Value417417407388
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear


Long
Period End2021-06-302021-03-312020-09-30
Value18027169
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear100.0100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:DomesticCountry


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value98715811504491763189379191272300
Percentage of OperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value653766562302469352452651736858
Percentage of OperatingLossCarryforwards66.248.537.361.661.4186.3119.2340.1270.8286.0

us-gaap:OperatingLossCarryforwardsValuationAllowance dei:LegalEntity, us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwardsValuationAllowance

skyw:ExpressJet, us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value900000.0500000.01200000.0500000.0800000.0
Percentage of OperatingLossCarryforwardsValuationAllowance100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentSalvageValuePercentage us-gaap:Range, us-gaap:PropertyPlantAndEquipmentByType

us-gaap:PropertyPlantAndEquipmentSalvageValuePercentage

srt:Maximum, skyw:AircraftAndRotableSpares


Property
Period End2020-12-312019-12-312018-12-31
Value20.00.20.2
Percentage of PropertyPlantAndEquipmentSalvageValuePercentage100.0100.0100.0

us-gaap:PurchaseObligation

us-gaap:PurchaseObligation


Purchase
Period End2021-06-302021-03-312020-09-30
Value791555655
Percentage of PurchaseObligation100.0100.0100.0

us-gaap:PurchaseObligationDueInNextTwelveMonths

us-gaap:PurchaseObligationDueInNextTwelveMonths


Purchase
Period End2021-06-302021-03-312020-09-30
Value27656139
Percentage of PurchaseObligationDueInNextTwelveMonths100.0100.0100.0

us-gaap:PurchaseObligationDueInSecondYear

us-gaap:PurchaseObligationDueInSecondYear


Purchase
Period End2021-06-302020-09-30
Value32402
Percentage of PurchaseObligationDueInSecondYear100.0100.0

us-gaap:PurchaseObligationFutureMinimumPaymentsRemainderOfFiscalYear

us-gaap:PurchaseObligationFutureMinimumPaymentsRemainderOfFiscalYear


Purchase
Period End2021-06-302021-03-312020-09-30
Value482499114
Percentage of PurchaseObligationFutureMinimumPaymentsRemainderOfFiscalYear100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value54.1745.4430.8419.714.2313.62
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value54.1545.2127.7118.3513.6513.1312.7
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.099.589.993.195.996.40.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

skyw:LongTermIncentivePlan2010


Share
Period End2020-12-31
Value4100000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value14.7414.7413.3613.1713.7614.4617.3918.8319.28
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:EmployeeStockOption


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1.47453.00519.249418180.0057266999999999995
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value42.4548.5849.8533.9620.8713.512.7212.338.35
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:EmployeeStockOption


Sharebased
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312013-12-31
Value1.47453.00517.3307105.98550.0022125
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1100.0100.0100.0100.0100.0100.0

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 us-gaap:AwardType, us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1

us-gaap:EmployeeStockOption, skyw:ExercisePriceRangeOne


Sharebased
Period End2020-12-312019-12-312018-12-31
Value13.5113.5113.04
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1100.0100.0100.0

us-gaap:EmployeeStockOption, skyw:ExercisePriceRangeThree


Sharebased
Period End2020-12-312019-12-312018-12-31
Value14.7414.7417.25
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1109.1109.1132.3

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 us-gaap:AwardType, us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1

us-gaap:EmployeeStockOption, skyw:ExercisePriceRangeOne


Sharebased
Period End2020-12-312019-12-312018-12-31
Value13.5113.5113.04
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1100.0100.0100.0

us-gaap:EmployeeStockOption, skyw:ExercisePriceRangeThree


Sharebased
Period End2020-12-312019-12-312018-12-31
Value14.7414.7418.31
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1109.1109.1140.4

us-gaap:StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased

us-gaap:StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased


Stock
Period End2020-12-312014-12-312013-12-312012-12-312012-09-14
Value2502525256.514266
Percentage of StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased100.0100.0100.0100.0100.0

us-gaap:StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased

us-gaap:StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased


Stock
Period End2020-12-31
Value139
Percentage of StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased100.0

us-gaap:TreasuryStockCommonValue

us-gaap:TreasuryStockCommonValue


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value618618617617617617590580555537503473458458435424423423410410
Percentage of TreasuryStockCommonValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued

us-gaap:UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued


Unrecognized
Period End2020-12-312019-12-31
Value360000.067000.0
Percentage of UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued100.0100.0

us-gaap:ValuationAllowancesAndReservesBalance us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:ValuationAllowancesAndReservesBalance

us-gaap:AccountingStandardsUpdate201613


Valuation
Period End2020-12-312019-12-31
Value6531
Percentage of ValuationAllowancesAndReservesBalance100.0100.0

us-gaap:ValuationAllowancesAndReservesBalance us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:ValuationAllowancesAndReservesType

us-gaap:AccountingStandardsUpdate201613, us-gaap:AllowanceForCreditLoss


Valuation
Period End2020-12-312019-12-31
Value4615
Percentage of ValuationAllowancesAndReservesBalance70.149.2

us-gaap:ValuationAllowancesAndReservesBalance us-gaap:ValuationAllowancesAndReservesType

us-gaap:InventoryValuationAndObsolescence


Valuation
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value19152217401311109.1898.2487.5416.6155.533
Percentage of ValuationAllowancesAndReservesBalance29.950.80.00.00.00.00.00.00.00.00.00.00.0

us-gaap:WorkersCompensationLiabilityCurrent

us-gaap:WorkersCompensationLiabilityCurrent


Workers
Period End2020-12-312019-12-312018-12-31
Value202342
Percentage of WorkersCompensationLiabilityCurrent100.0100.0100.0

Line plots across dimensions of each concept


us-gaap:CommonStockSharesOutstanding
us-gaap:StatementEquityComponents
(None,)
Common Stock Shares Outstandingus-gaap: Statement Equity Components
COGS Ratio
us-gaap:StatementBusinessSegments
(None,)
C O G S  Ratious-gaap: Statement Business Segments
TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:CostOfGoodsAndServicesSold
us-gaap:ProductOrService
(None,)
Cost Of Goods And Services Soldus-gaap: Product Or Service
us-gaap:CostOfGoodsAndServicesSold
us-gaap:StatementBusinessSegments
(None,)
Cost Of Goods And Services Soldus-gaap: Statement Business Segments
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
Income Loss From Continuing Operations 
Before Income Taxes Extraordinary Items Noncontrolling Interestus-gaap: Consolidation Items, us-gaap: Statement Business Segments
us-gaap:InterestExpense
us-gaap:StatementBusinessSegments
(None,)
Interest Expenseus-gaap: Statement Business Segments
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ProductOrService
(None,)
Revenue From Contract With Customer Including Assessed Taxus-gaap: Product Or Service
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:StatementBusinessSegments
(None,)
Revenue From Contract With Customer Including Assessed Taxus-gaap: Statement Business Segments
us-gaap:Revenues
us-gaap:ProductOrService
(None,)
Revenuesus-gaap: Product Or Service
us-gaap:Assets
us-gaap:StatementBusinessSegments
(None,)
Assetsus-gaap: Statement Business Segments
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:DepreciationDepletionAndAmortization
us-gaap:StatementBusinessSegments
(None,)
Depreciation Depletion And Amortizationus-gaap: Statement Business Segments
us-gaap:PaymentsToAcquireProductiveAssets
us-gaap:StatementBusinessSegments
(None,)
Payments To Acquire Productive Assetsus-gaap: Statement Business Segments
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:AircraftType, us-gaap:Range
('skyw:E175', None)
Debt Instrument Interest Rate Stated Percentageus-gaap: Aircraft Type, us-gaap: Range