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Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Total other comprehensive income (loss), net of tax Other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax Due after ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Before Tax AOCI before Tax, Attributable to Parent [Roll Forward] AOCI before Tax, Attributable to Parent Adjustment to Compensation, Amount Adjustment to Compensation Amount Qualified Defined Benefit Pension Plan [Member] Stock-based compensation and other Share-Based Payment Arrangement, Noncash Expense Employee Stock Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Third-party regional carrier expense Regional Carrier Expense Regional Carrier Expense Total Shareholders' Equity Beginning balance Ending balance Equity, Attributable to Parent Change in value OCI, before Reclassifications, Net of Tax, Attributable to Parent Insider Trading Policies and Procedures [Line Items] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Hedging Designation [Domain] Hedging Designation [Domain] Long-term debt Notes Payable, Fair Value Disclosure Passenger ticket revenue, net of taxes and fees Passenger Tickets [Member] Passenger Tickets [Member] Total Liabilities and Shareholders' Equity Liabilities and Equity Employee Benefit Plan Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Equity [Abstract] Cover [Abstract] Reclassifications into earnings Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Shareholders' Equity Stockholders' Equity, Number of Shares, Par Value and Other Disclosure [Abstract] Accounting Policies [Abstract] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Treasury Stock Treasury Stock, Common [Member] Loyalty Plan Revenue Loyalty Plan Revenue [Member] Loyalty Plan Revenue [Member] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] net share settlement (in shares) Stock Issued During Period, Shares, Warrants Exercised Stock Issued During Period, Shares, Warrants Exercised Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Retirement Benefits [Abstract] Air traffic liability Air Traffic Liability [Member] Air Traffic Liability Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Loss Before Income Tax Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Aircraft, aircraft purchase deposits, and other flight equipment Payments for Flight Equipment Other liabilities Other Liabilities, Noncurrent Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Increase in deferred revenue Increase (Decrease) in Deferred Revenue Virgin Group trademark license agreement Virgin Group Trademark License Agreement [Member] Virgin Group Trademark License Agreement Statement of Stockholders' Equity [Abstract] Less current portion Long-Term Debt, Current Maturities Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Total Comprehensive Loss, Net of Tax Comprehensive Income (Loss), Net of Tax, Attributable to Parent Name Measure Name Current portion of operating lease liabilities Operating Lease, Liability, Current Weighted-average fixed-interest rate Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate Deferred income taxes Deferred Income Tax Liabilities, Net Document Fiscal Period Focus Document Fiscal Period Focus Award Timing Method Award Timing Method [Text Block] Litigation Case [Domain] Litigation Case [Domain] Award Type Award Type [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Total debt Long-Term Debt Total Assets Assets Warrants exercised (in shares) Class of Warrant or Right, Number of Warrants Exercised Class of Warrant or Right, Number of Warrants Exercised Trading Symbol Trading Symbol Geographical [Domain] Geographical [Domain] Landing fees and other rentals Landing Fees and Other Rentals Stock issued under stock plans (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Entity Address, City or Town Entity Address, City or Town Cash Flows from Operating Activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] E175 E175 [Member] E175 [Member] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Income Statement Location [Domain] Statement of Income Location, Balance [Domain] Remainder of 2026 Unrecorded Unconditional Purchase Obligation, to be Paid, Remainder of Fiscal Year Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Damages awarded Loss Contingency, Damages Awarded, Value Fixed-rate notes payable due through 2038 Fixed Rate-Notes Payable, Due Through 2038 [Member] Fixed Rate-Notes Payable, Due Through 2029 Due after one year through five years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost Entity Emerging Growth Company Entity Emerging Growth Company 2029 Long-Term Debt, Maturity, Year Three Unusual or Infrequent Items, or Both [Abstract] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Right-of-use assets acquired through operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Fixed-rate PSP notes payable due through 2031 Fixed-Rate PSP Notes Payable, Due Through 2031 [Member] Fixed-Rate PSP Notes Payable, Due Through 2031 Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Less debt issuance costs Debt Issuance Costs, Net Level 2 Fair Value, Inputs, Level 2 [Member] Equity method investments Equity Method Investments Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Passenger ancillary revenue Passenger Ancillary Services [Member] Passenger Ancillary Services [Member] Fixed-rate Japanese Yen denominated notes payable due through 2031 Fixed-Rate Japanese Yen Denominated Notes Payable, Due Through 2031 [Member] Fixed-Rate Japanese Yen Denominated Notes Payable, Due Through 2031 Common stock, shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Increase in liability for loyalty points issued Contract with Customer, Liability, Increase From Issuance of Credits Contract with Customer, Liability, Increase From Issuance of Credits Alaskan Credit Facility Alaskan Credit Facility [Member] Alaskan Credit Facility PEO PEO [Member] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Schedule of Debt Investment Maturities Investments Classified by Contractual Maturity Date [Table Text Block] Non-cash transactions: Noncash Investing and Financing Items [Abstract] Interest income Investment Income, Interest Due in one year or less Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Stock-based compensation (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Unrecorded Unconditional Purchase Obligation [Line Items] Unrecorded Unconditional Purchase Obligation [Line Items] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Retained Earnings Retained Earnings [Member] Maturities of Long-Term Debt [Abstract] Maturities of Long-Term Debt [Abstract] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Cash, cash equivalents, and restricted cash at beginning of period Cash, cash equivalents, and restricted cash at end of period Total cash, cash equivalents, and restricted cash at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income tax benefit Income Tax Expense (Benefit) Change in value OCI, before Reclassifications, before Tax, Attributable to Parent Total Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required Special items - operating Special items, expenses Special Items - Net, Operating Expense Special Items - Net, Operating Expense Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Intangible assets - net of accumulated amortization of $88 and $74 Intangible Assets, Net (Excluding Goodwill) Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Derivative Instruments Designated as Hedges Designated as Hedging Instrument [Member] Product and Service [Domain] Product and Service [Domain] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Hedging Relationship [Axis] Hedging Relationship [Axis] Interest rate derivative instruments Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Notional amount Derivative, Notional Amount Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] City Area Code City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Other accrued liabilities Accrued Liabilities, Current Dilutive effect of stock awards and stock warrants Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants Commitments and Contingencies Disclosure [Abstract] Class of Warrant or Right [Line Items] Class of Warrant or Right [Line Items] Contract with Customer, Asset and Liability Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Property and equipment additions Payments to Acquire Productive Assets [Abstract] Cash Flows from Investing Activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Recognized actuarial loss Defined Benefit Plan, Amortization of Gain (Loss) Subsequent Event Subsequent Event [Member] Cash Flow Hedging Cash Flow Hedging [Member] Goodwill Goodwill Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Equity Components [Axis] Equity Components [Axis] Capacity Purchase Agreements Capacity [Member] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of reportable segments Number of Reportable Segments Tax Effect AOCI Tax, Attributable to Parent [Roll Forward] AOCI Tax, Attributable to Parent Other Performance Measure, Amount Other Performance Measure, Amount U.S. government and agency securities US Treasury and Government [Member] Entity Address, State or Province Entity Address, State or Province Total Current Liabilities Liabilities, Current B737 B-737 [Member] Net decrease in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation Interest capitalized Interest Costs Capitalized Adjustment Aircraft maintenance Aircraft Maintenance, Materials, and Repairs Derivative Instrument [Axis] Derivative Instrument [Axis] Individual: Individual [Axis] Restricted cash Restricted Cash Other current assets Other Assets, Current Fixed-rate EETCs payable due through 2027 Fixed-Rate EETCs Payable, Due Through 2027 [Member] Fixed-Rate EETCs Payable, Due Through 2027 Capital in excess of par value Additional Paid in Capital, Common Stock Passenger Services Passenger Services [Member] Passenger Services [Member] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Interest, net of amount capitalized Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Prepayments of debt Prepayments of Long-Term Debt Prepayments of Long-Term Debt No maturity date Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost Organization and basis of presentation Basis of Accounting, Policy [Policy Text Block] Contracted services Professional and Contract Services Expense Operating lease assets Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Long-term debt payments Repayments of Long-Term Debt Entity Interactive Data Current Entity Interactive Data Current Carrying Amount Reported Value Measurement [Member] Equity [Abstract] Domestic North America [Member] Variable-rate Japanese Yen denominated notes payable due through 2033 Variable-Rate Japanese Yen Denominated Notes Payable, Due Through 2033 [Member] Variable-Rate Japanese Yen Denominated Notes Payable, Due Through 2033 2029 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Three Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Current portion of long-term debt and finance leases Long-Term Debt and Lease Obligation, Current Latin America Latin America [Member] Class of Warrant or Right [Table] Class of Warrant or Right [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Variable-rate PSP notes payable due through 2031 Variable-Rate PSP Notes Payable Due Through 2030 And 2031 [Member] Variable-Rate PSP Notes Payable Due Through 2030 And 2031 Schedule of Net Benefit Costs Schedule of Net Benefit Costs [Table Text Block] Other Debt Obligations Other Debt Obligations [Member] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] ACCUMULATED OTHER COMPREHENSIVE LOSS Comprehensive Income (Loss) Note [Text Block] US Treasury CARES Act Loan - Warrants, Exercise Price of $52.25 US Treasury CARES Act Loan - Warrants, Exercise Price of $52.25 [Member] US Treasury CARES Act Loan - Warrants, Exercise Price of $52.25 Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Restricted cash included in Other noncurrent assets Restricted Cash and Cash Equivalent, Current Beginning balance Ending balance AOCI before Tax, Attributable to Parent Common stock repurchase Common stock repurchase Stock Repurchased During Period, Value Schedule of Accumulated Other Comprehensive Loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] CARES Act warrants exercised Stock issued During Period, Shares, Warrant Exercises Stock issued During Period, Shares, Warrant Exercises Depreciation and amortization Depreciation, Depletion and Amortization Other noncurrent assets Other Assets, Noncurrent Entity Central Index Key Entity Central Index Key PEO Name PEO Name Passenger Cargo Services [Member] Cargo Services [Member] Schedule of Maturities of Long-term Debt Schedule of Maturities of Long-Term Debt [Table Text Block] Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Supplemental disclosure: Supplemental Cash Flow Elements [Abstract] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Revolving Credit Facility Revolving Credit Facility [Member] Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plan [Table] Arrangement Duration Trading Arrangement Duration Firm Orders Firm Aircraft Commitment [Member] Firm Aircraft Commitment Passenger revenue Passenger Revenue [Member] Passenger Revenue [Member] Deferred revenue Contract with Customer, Liability, Current Total debt, gross Long-Term Debt, Gross, Including Adjustments Long-Term Debt, Gross, Including Adjustments Exercise price of warrant (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Class of Stock [Domain] Class of Stock [Domain] Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Other investing activities Payment for (Proceeds from) Other Investing Activity Other - net Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item Subsequent Event Type [Axis] Subsequent Event Type [Axis] Wages and Benefits Labor And Related Expense [Member] Labor And Related Expense [Member] ASSETS Assets [Abstract] Long-term debt, net of current portion Long-Term Debt, Excluding Current Maturities Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] Debt Instrument [Axis] Debt Instrument [Axis] Nonoperating Income (Expense) Nonoperating Income (Expense) [Member] EMPLOYEE BENEFIT PLANS Retirement Benefits [Text Block] FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Credit Facility [Domain] Credit Facility [Domain] Shareholders' Equity: Equity, Attributable to Parent [Abstract] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Cost basis Debt Securities, Available-for-Sale, Amortized Cost, after Allowance for Credit Loss Entity Address, Address Line One Entity Address, Address Line One Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Operating lease liabilities, net of current portion Operating Lease, Liability, Noncurrent Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Thereafter Long-Term Debt, Maturity, After Year Four Long-Term Debt, Maturity, After Year Four Fair Value as of Grant Date Award Grant Date Fair Value Entity Registrant Name Entity Registrant Name Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Net pension expense Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Schedule of Long-term Debt Instruments Schedule of Long-Term Debt Instruments [Table Text Block] Wages and benefits Labor and Related Expense Total Operating Expenses Costs and Expenses Document Quarterly Report Document Quarterly Report Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Number of operating segments Number of Operating Segments Options and Other Rights Aircraft Purchase Option [Member] Aircraft Purchase Option Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Food and beverage service Cost of Services, Catering Interest cost Defined Benefit Plan, Interest Cost Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Unrecorded Unconditional Purchase Obligation [Table] Unrecorded Unconditional Purchase Obligation [Table] Restatement Determination Date: Restatement Determination Date [Axis] Stock issued under stock plans Shares Issued, Value, Share-Based Payment 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Debt instrument, face amount Debt Instrument, Face Amount Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Statement of Comprehensive Income [Abstract] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Fair Value Estimate of Fair Value Measurement [Member] Revenue recognized Contract with Customer, Liability, Revenue Recognized Retirement Plan Type [Domain] Retirement Plan Type [Domain] Other Services Other Services [Member] Other Services [Member] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Equity mutual funds Equity Funds [Member] Name Awards Close in Time to MNPI Disclosures, Individual Name Variable incentive pay Other Labor-related Expenses Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Operating Revenue Revenues [Abstract] Alaskan And Hawaiian Credit Facility Alaskan And Hawaiian Credit Facility [Member] Alaskan And Hawaiian Credit Facility Fair Value Debt Securities, Available-for-Sale, Maturity, Fair Value, Rolling Maturity [Abstract] Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Long-term debt and finance leases, net of current portion Long-Term Debt and Lease Obligation 2027 Long-Term Debt, Maturity, Year One Change in value Other Comprehensive Income (Loss) before Reclassifications, Tax Financial Instruments [Domain] Financial Instruments [Domain] Marketable securities OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Litigation Case [Axis] Litigation Case [Axis] Damages sought Loss Contingency, Damages Sought, Value Income Statement Location [Axis] Statement of Income Location, Balance [Axis] Total Noncurrent Assets Assets, Noncurrent Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Inventories and supplies - net Inventory, Net Class of warrant or right, Number of securities called by warrants or rights (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Marketable Securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Property and equipment, accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Company Selected Measure Name Company Selected Measure Name Fair Value Measurement [Domain] Fair Value Measurement [Domain] Purchases of marketable securities Payments to Acquire Debt Securities, Available-for-Sale DEBT Debt Disclosure [Text Block] Preferred stock, $0.01 par value, Authorized: 5,000,000 shares, none issued or outstanding Preferred Stock, Value, Issued Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Municipal securities and other US States and Political Subdivisions Debt Securities [Member] Accounts payable Accounts Payable, Current Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] All Executive Categories All Executive Categories [Member] Common stock, $0.01 par value, Authorized: 400,000,000 shares, Issued: 2026 - 145,631,281 shares; 2025 - 145,115,659 shares, Outstanding: 2026 - 111,359,830 shares; 2025 - 115,530,889 shares Common Stock, Value, Issued COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Diluted Diluted weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Segment reporting Segment Reporting, Policy [Policy Text Block] Commitments and Contingencies (Note 6) Commitments and Contingencies Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] US Treasury CARES Act Loan - Warrants, Exercise Price $31.61 US Treasury CARES Act Loan - Warrants, Exercise Price $31.61 [Member] US Treasury CARES Act Loan - Warrants, Exercise Price $31.61 Entity Small Business Entity Small Business Other Other Cost and Expense, Operating Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Document Transition Report Document Transition Report Underlying Securities Award Underlying Securities Amount Debt payments Repayments of Other Long-Term Debt Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Loyalty program passenger revenue Loyalty Plan [Member] Loyalty Plan Revenue from Contract with Customer [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Line of credit facility, asset restrictions, unrestricted cash and marketable securities Line of Credit Facility, Asset Restrictions, Unrestricted Cash and Marketable Securities Line of Credit Facility, Asset Restrictions, Unrestricted Cash and Marketable Securities Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] LOSS PER SHARE Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Loss Contingencies [Table] Loss Contingencies [Table] Employee benefit plans Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Product and Service [Axis] Product and Service [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Total Operating Revenue Revenue from Contract with Customer, Excluding Assessed Tax All Individuals All Individuals [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Fair Value Disclosures [Abstract] Name Forgone Recovery, Individual Name Total Current Assets Assets, Current 2030 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Four Year-over-Year 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Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Cargo and other revenue Cargo and Other Revenue [Member] Cargo and Other Revenue [Member] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Beginning balance Ending balance AOCI Tax, Attributable to Parent Geographical [Axis] Geographical [Axis] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Outstanding borrowing Long-Term Line of Credit Level 1 Fair Value, Inputs, Level 1 [Member] Pacific Asia Pacific [Member] Diluted loss per share (in dollars per share) Earnings Per Share, Diluted Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Title of 12(b) Security Title of 12(b) Security Due in one year or less Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Total AOCI Attributable to Parent, Net of Tax [Roll Forward] Treasury stock (in shares) Treasury Stock, Common, Shares Weighted Average Shares Outstanding used for computation: Earnings Per Share [Abstract] Total Non-operating Expense Nonoperating Income (Expense) Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Asset-backed securities Asset-Backed Securities, Securitized Loans and Receivables [Member] Marketable securities Debt Securities, Available-for-Sale, Current Increase in air traffic liability Increase (Decrease) in Contract with Customer, Liability Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Axis] B787 B787 [Member] B787 Award Timing Disclosures [Line Items] Service cost Defined Benefit Plan, Service Cost Total Principal Payments Long-Term Debt, Gross Accrued wages, vacation and payroll taxes Employee-related Liabilities, Current SHAREHOLDER'S EQUITY Equity [Text Block] Due after five years through ten years Debt Securities, 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Reporting Status Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Operating Loss Operating Income (Loss) Line of Credit Line of Credit [Member] Retained earnings Retained Earnings (Accumulated Deficit) Financial Instrument [Axis] Financial Instrument [Axis] Statement of Financial Position [Abstract] 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] Executive Category: Executive Category [Axis] Aircraft fuel Fuel Costs, Gross of Hedging Property and equipment acquired through the issuance of debt Noncash or Part Noncash Acquisition, Fixed Assets Acquired Loyalty financing, variable-rate term loan facility due through 2031 Loyalty Financing, Variable-Rate Term Loan Facility, Due Through 2031 [Member] Loyalty Financing, Variable-Rate Term Loan Facility, Due Through 2031 Proceeds from issuance of 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Year Two Treasury stock (common), at cost: 2026 - 34,271,451 shares; 2025 - 29,584,770 shares Treasury Stock, Common, Value Termination Date Trading Arrangement Termination Date Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Cash paid during the period for: Caid Paid Refunded [Abstract] Caid Paid Refunded [Abstract] Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] 2028 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Two Basic Basic weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Selling expenses Selling Expense Remaining amount Share Repurchase Program, Remaining Authorized, Amount Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Non-cash special items Special Items - Net, Noncash Special Items - Net, 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Expense of Enforcement, Amount Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares issued (in shares) Common Stock, Shares, Issued 2030 Long-Term Debt, Maturity, Year Four Interest expense Interest Expense, Nonoperating Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Loss Contingencies [Line Items] Loss Contingencies [Line Items] Aircraft rent Aircraft Rental Insider Trading Arrangements [Line Items] Security Exchange Name Security Exchange Name Remainder of 2026 Long-Term Debt, Maturity, Remainder of Fiscal Year Total Noncurrent Liabilities Liabilities, Noncurrent Aircraft Capital Addition Purchase Commitments [Member] Mortgage-backed securities Collateralized Mortgage-Backed Securities [Member] Total Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost Line of credit facility, borrowing capacity Line of Credit 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Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Corporate notes and bonds Corporate Debt Securities [Member]