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Arrangement by Share-Based Payment Award [Line Items] Thereafter Long-term Purchase Commitment, Minimum Quantity Required, After Year Four Long-term Purchase Commitment, Minimum Quantity Required, After Year Four Engines Aircraft Engine [Member] Aircraft Engine Statement of Financial Position [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Class of Stock [Axis] Class of Stock [Axis] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Aircraft Type [Axis] Aircraft Type [Axis] Station obligations Accrued Landing Fees and Other Rentals, Current Accrued Landing Fees and Other Rentals, Current Level 2 Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group 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in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Income Tax Authority, Name [Axis] Income Tax Authority, Name [Axis] Amount of employees represented by unions Percentage of Workforce Multiemployer Plan, Pension, Significant, Employees Covered by Collective-Bargaining Arrangement to All Entity's Employees, Percentage Litigation settlement, fee expense Litigation Settlement, Fee Expense Operating lease cost Operating Lease, Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Weighted average grant date fair value, withheld to cover employee taxes (in dollars per share) Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation, Weighted Average Grant Date Fair Value Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation, Weighted Average Grant Date Fair Value Cash settlement (less than) Class of Warrant or Right, Expense or Revenue Recognized Steve Schuller [Member] Steve Schuller Aircraft and Aircraft Engines Aircraft and Aircraft Engines [Member] Aircraft and Aircraft Engines Equity Awards Adjustments Equity Awards Adjustments [Member] Remainder of 2026 Purchase Obligation, to be Paid, Remainder of Fiscal Year Total liabilities and stockholders’ equity Liabilities and Equity Variable lease cost Variable Lease, Cost Employee Stock Option Share-Based Payment Arrangement, Option [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Other liabilities Increase (Decrease) in Other Operating Liabilities Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Plan Name [Axis] Plan Name [Axis] Income Tax Jurisdiction [Domain] Income Tax Jurisdiction [Domain] Tabular List, Table Tabular List [Table Text Block] Vesting [Axis] Vesting [Axis] Gains recognized on sale-leaseback transactions Gains recognized on sale-leaseback transactions Sale and Leaseback Transaction, Gain (Loss), Net Additional paid-in capital Additional Paid in Capital Other operating Other Operating Income (Expense), Net Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Schedule of Other Current Liabilities Other Current Liabilities [Table Text Block] Total Aircraft Air Transportation Equipment [Member] Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Preferred stock authorized for issuance (in shares) Preferred Stock, Shares Authorized Proceeds from prepaid loyalty program consideration Proceeds From Prepaid Loyalty Program Proceeds From Prepaid Loyalty Program Adjustment to Compensation: Adjustment to Compensation [Axis] Remainder of 2026 Long-term Purchase Commitment, Minimum Quantity Required, Remainder Of Fiscal Year Long-term Purchase Commitment, Minimum Quantity Required, Remainder Of Fiscal Year Class of Stock [Domain] Class of Stock [Domain] Thereafter Long-Term Debt, Maturity, After Year Four Long-Term Debt, Maturity, After Year Four Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Capital expenditures Payments to Acquire Productive Assets Statement of Cash Flows [Abstract] U.S. Transportation Security Administration U.S. Transportation Security Administration [Member] U.S. Transportation Security Administration Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] Pre-delivery Credit Facilities Pre-Delivery Credit Facility [Member] Pre-Delivery Credit Facility Unrealized gains (losses) from cash flow hedges net of adjustment for de-designation of fuel hedges, tax benefit/(expense) (less than) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax, Parent Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Maintenance Controllers Collective-Bargaining Arrangement, Employee Group, Maintenance Controllers [Member] Collective-Bargaining Arrangement, Employee Group, Maintenance Controllers Debt Instrument [Line Items] Debt Instrument [Line Items] Sale Leaseback Transaction, Description [Axis] Sale Leaseback Transaction, Description [Axis] Air traffic liability balance Contract With Customer, Liability, Air Traffic Contract With Customer, Liability, Air Traffic Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional paid-in capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Aircraft Technicians Collective-Bargaining Arrangement, Employee Group, Aircraft Technicians [Member] Collective-Bargaining Arrangement, Employee Group, Aircraft Technicians Aircraft Appearance Agents Collective-Bargaining Arrangement, Employee Group, Aircraft Appearance Agents [Member] Collective-Bargaining Arrangement, Employee Group, Aircraft Appearance Agents Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Company Selected Measure Amount Company Selected Measure Amount Air traffic liability recognized as passenger revenue (in percent) Contract With Customer, Liability, Revenue Recognized, Percentage Contract With Customer, Liability, Revenue Recognized, Percentage Non-PEO NEO Non-PEO NEO [Member] Total non-fare passenger revenue Non-Fare Passenger Revenue [Member] Non-Fare Passenger Revenue Entity Address, Address Line One Entity Address, Address Line One Acquired aircraft and engines through operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Weighted average grant date fair value, for vested shares (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Income tax expense (benefit) Income Tax Expense (Benefit) Schedule of Collective Bargaining Agreements Multiemployer Plan [Table Text Block] Adjustments to reconcile net loss to cash provided by (used in) operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Total Purchase Obligation Award Timing Method Award Timing Method [Text Block] Consolidation Consolidation, Policy [Policy Text Block] Net increase (decrease) in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Other Other revenues Product and Service, Other [Member] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Early Return Agreements charges Early Return Agreement Charges Early Return Agreement Charges Aircraft fuel Fuel Costs Net income (loss) Net income (loss) Net loss Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Proceeds from the exercise of stock options Proceeds from Stock Options Exercised Leased aircraft return cost liability Aircraft Lease Returns, Liability Aircraft Lease Returns, Liability Interest income and other Investment Income, Interest PSP1 Promissory Note Payroll Support Program, Promissory Note One [Member] Payroll Support Program, Promissory Note One Number of engines dependent on usage-based metrics Lessee, Operating Leases, Number Of Leases With Lease Rates Dependent On Usage-Based Metrics Lessee, Operating Leases, Number Of Leases With Lease Rates Dependent On Usage-Based Metrics Passenger and other taxes and fees payable Passenger Taxes and Fees Payable, Current Passenger Taxes and Fees Payable, Current Operating revenues: Revenues [Abstract] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Diluted: Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]