Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Maximum [Member] Maximum [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Adjusted weighted-average shares outstanding under treasury stock method (in shares) Weighted Average Number of Diluted Shares Outstanding Treasury Stock Method The average number of shares or units issued and outstanding that are used in calculating diluted EPS, determined based on the timing of issuance of shares in the period under the treasury stock method. Unusual or Infrequent Items, or Both [Abstract] Unusual or Infrequent Items, or Both [Abstract] Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Net income attributable to common stock Net Income (Loss) Available to Common Stockholders, Diluted Document Fiscal Year Focus Document Fiscal Year Focus Number Of Aircraft Committed To Purchase Number Of Aircraft Committed To Purchase Number Of Aircraft Committed To Purchase Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Segment Reporting [Abstract] Segment Reporting [Abstract] Airline Allegiant Air [Member] Allegiant Air [Member] Assets Measured at Fair Value On a Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Common stock, par value $0.001 Common Stock, Value, Issued Interest expense Interest Expense, Operating and Nonoperating Restatement Determination Date Restatement Determination Date Schedule of Maturities of Long-Term Debt [Abstract] Maturities of Long-Term Debt [Abstract] Revenue, Performance Obligation, Description of Timing Revenue, Performance Obligation, Description of Timing Measurement Frequency [Axis] Measurement Frequency [Axis] Amendment Flag Amendment Flag CURRENT LIABILITIES Liabilities, Current [Abstract] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Sunseeker special charges, net of insurance recoveries Sunseeker Special Charges [Member] Sunseeker Special Charges Other adjustments Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item Other comprehensive loss: Other Comprehensive Income (Loss), Net of Tax [Abstract] Accelerated depreciation on airframes identified for early retirement Accelerated Depreciation On Airframes Identified For Early Retirement [Member] Accelerated Depreciation On Airframes Identified For Early Retirement Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Property, Plant, and Equipment [Abstract] Property, Plant, and Equipment [Abstract] Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Common Stock, Par or Stated Value Per Share (in dollars per share) Common Stock, Par or Stated Value Per Share Land and buildings/leasehold improvements Land and buildings/leasehold improvements Land and buildings/leasehold improvements Basic (in shares) Weighted-average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Debt instrument, basis spread on variable rate term Debt Instrument, Basis Spread on Variable Rate Term Debt Instrument, Basis Spread on Variable Rate Term Long-term investments Long-Term Investments Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Number of Reportable Segments Number of Reportable Segments TOTAL CURRENT LIABILITIES Liabilities, Current Passenger Revenue Passenger Revenue [Member] Passenger Revenue Participating securities excluded under two-class method (in shares) Participating securities excluded under two-class method Shares excluded in the calculation of Diluted EPS for participating securities under the two-class method. Entity Address, City or Town Entity Address, City or Town Computer hardware and software Computer Hardware and Software Computer Hardware and Software Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Fair Value, Inputs, Level 2 Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Long-term Debt, Current Maturities Long-Term Debt, Current Maturities Secured Debt By Aircraft, Engines, Other Equipment And Real Estate Secured Debt By Aircraft, Engines, Other Equipment And Real Estate [Member] Secured Debt By Aircraft, Engines, Other Equipment And Real Estate Deposit financing facility, drawdown amount Deposit Financing Facility, Drawdown Amount Deposit Financing Facility, Drawdown Amount Resort Revenue Resort Revenue [Member] Resort Revenue Subsequent Event Type [Axis] Subsequent Event Type [Axis] Secured Credit Facility Secured Credit Facility [Member] Secured Credit Facility Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Treasury shares Treasury Stock, Value Air traffic liability Increase (Decrease) in Contract with Customer, Liability Segment Reporting Segment Reporting [Table Text Block] Unsecured debt Unsecured Debt [Member] Repayments of lines of credit Repayments of Lines of Credit Total debt and finance lease obligations, net of related costs Long-Term Debt Property and Equipment Property, Plant, and Equipment [Text Block] Document Period End Date Document Period End Date Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Debt instrument, face amount Debt Instrument, Face Amount Basic: Earnings Per Share, Basic [Abstract] Security Exchange Name Security Exchange Name Debt instrument, term Debt Instrument, Term Earnings per share to common shareholders: Earnings per share to common stockholders: [Abstract] -- None. No documentation exists for this element. -- Accumulated other comprehensive income, net Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Current operating lease liabilities Operating Lease, Liability, Current Property, Plant, and Equipment Property, Plant, and Equipment [Table Text Block] US Government and agency obligations US Treasury Bond Securities [Member] Earnings per Share Earnings Per Share [Text Block] OPERATING REVENUES: OPERATING REVENUE: [Abstract] -- None. No documentation exists for this element. -- Name Outstanding Recovery, Individual Name Business Interruption Loss [Line Items] Business Interruption Loss [Line Items] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Secured Long-term Debt, Noncurrent Carrying Value Secured Long-Term Debt, Noncurrent Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] TOTAL LIABILITIES: Liabilities Trading Symbol Trading Symbol Purchase of property and equipment, including capitalized interest Payments to Acquire Property, Plant, and Equipment 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] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Company Selected Measure Name Company Selected Measure Name Purchase of investment securities Payments to Acquire Debt Securities, Available-for-Sale Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Fair Value Measurements Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block] Change in available-for-sale securities, net of tax OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Diluted: Earnings Per Share, Diluted [Abstract] Line of credit facility, drew amount Line Of Credit Facility, Drew Amount Line Of Credit Facility, Drew Amount US Government and agency obligations US Government Corporations and Agencies Securities [Member] Deferred major maintenance, net Deferred Maintenance Costs, Net, Noncurrent Deferred maintenance costs, net, noncurrent. Asset Class [Domain] Asset Class [Domain] Credit Facility [Domain] Credit Facility [Domain] Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Air Traffic Liability, Recognized Air Traffic Liability, Recognized Air Traffic Liability, Recognized Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Weighted-average shares outstanding ( in shares) Weighted Average Number of Shares Outstanding, Diluted Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] OTHER (INCOME) EXPENSES: OTHER (INCOME) EXPENSE: [Abstract] -- None. No documentation exists for this element. -- Consolidated Variable Interest Entities Consolidated Variable Interest Entities [Member] Consolidated Variable Interest Entities Underlying Security Market Price Change Underlying Security Market Price Change, Percent Other property and equipment Property, Plant, and Equipment, Other, before Accumulated Depreciation Commercial paper Commercial Paper [Member] Award Timing Predetermined Award Timing Predetermined [Flag] Resort and other Other revenue Other operating revenue not otherwise defined in the taxonomy, primarily generated from aircraft and flight equipment leased to third parties. Treasury shares Treasury Stock, Common [Member] Document and Entity Information [Abstract] Document and Entity Information [Abstract] -- None. No documentation exists for this element. -- Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Debt and Lease Obligation Debt and Lease Obligation Share-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Fair Value, Inputs, Level 1 Fair Value, Inputs, Level 1 [Member] Effective Income Tax Rate Reconciliation, Percent Effective Income Tax Rate Reconciliation, Percent Dilutive effect of stock options and restricted stock (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements All Executive Categories All Executive Categories [Member] Station operations Station operations Includes the fees charged by airports for the use or lease of airport facilities and fees charged by third party vendors for ground handling services, commissary expenses and other related services such as deicing of aircraft. Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Estimated Fair Value Long-Term Debt, Fair Value Sales and marketing Sales and marketing Selling and Marketing Expense Computation of Net Income Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Current maturities of long-term debt and finance lease obligations, net of related costs Long-Term Debt and Lease Obligation, Current Segments Segment Reporting [Text Block] Long-term line of credit Long-Term Line of Credit Minimum [Member] Minimum [Member] Food and beverage Food and Beverage [Member] Accelerated amortization of software identified for redevelopment Accelerated Amortization And Disposal Of Software Identified For Redevelopment [Member] Accelerated Amortization And Disposal Of Software Identified For Redevelopment Points awarded (deferral of revenue) Points awarded Points awarded Expiration Date Trading Arrangement Expiration Date NET CHANGE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation 2030 Long-Term Debt, Maturity, Year Four Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Cash Equivalents Cash and Cash Equivalents, Fair Value Disclosure Line of Credit Facility, Expiration Period Line of Credit Facility, Expiration Period Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Disposal Group, Including Discontinued Operations [Line Items] Disposal Group, Including Discontinued Operations [Line Items] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Loyalty redemptions Co-brand Revenue [Member] Co-brand Revenue [Member] Summary of Special Charges Summary of Special Charges [Table Text Block] Summary of Special Charges Flight equipment Airline, Property, Plant, and Equipment, Flight Equipment, before Accumulated Depreciation Exercise Price Award Exercise Price Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Fair Value, Measurements, Recurring Fair Value, Recurring [Member] Segment Reporting [Line Items] Segment Reporting [Line Items] Proceeds from maturities of investment securities Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale Document Quarterly Report Document Quarterly Report Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments [Domain] Segments [Domain] Municipal debt securities US States and Political Subdivisions Debt Securities [Member] Lender Name [Axis] Lender Name [Axis] Debt Issuance Costs, Net Debt Issuance Costs, Net Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity Component [Domain] Equity Component [Domain] Interest expense Interest Costs Incurred PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Secured Debt Secured Debt [Member] Adoption Date Trading Arrangement Adoption Date Thereafter Long-Term Debt, Maturity, after Year Five Debt instrument, interest rate, stated percentage Debt Instrument, Interest Rate, Stated Percentage TOTAL EQUITY: Beginning balance Ending balance Equity, Attributable to Parent Total other expenses Nonoperating Income (Expense) Restructuring Type [Axis] Restructuring Type [Axis] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Estimated Fair Value of Debt [Abstract] Estimated Fair Value of Debt [Abstract] Estimated Fair Value of Debt [Abstract] Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Business combination, consideration transferred, equity interests issued and issuable, entity shares issued per acquiree share Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share Contract with Customer, Liability, Forward Bookings Contract with Customer, Liability, Forward Bookings Contract with Customer, Liability, Forward Bookings Insider Trading Policies and Procedures [Line Items] Finance Lease, Liability Finance Lease, Liability Senior Secured Notes Due 2027 Senior Secured Notes Due 2027 [Member] Senior Secured Notes Due 2027 Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Business Combination [Domain] Business Combination [Domain] Type of Restructuring [Domain] Type of Restructuring [Domain] Special charges, net of recoveries Special charges, net of recoveries Restructuring, Settlement and Impairment Provisions Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Sunseeker Sunseeker Resorts [Member] Sunseeker Resorts [Member] Number of Operating Segments Number of Operating Segments Entity Central Index Key Entity Central Index Key Less accumulated depreciation and amortization Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization All Adjustments to Compensation All Adjustments to Compensation [Member] Other - net Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item Business Combination [Axis] Business Combination [Axis] 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] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Remaining in 2026 Long-Term Debt, Maturity, Remainder of Fiscal Year Income Statement [Abstract] Income Statement [Abstract] TOTAL LIABILITIES: Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] OPERATING EXPENSES: Operating Expenses [Abstract] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Aircraft lease rentals Aircraft Lease Rental Aircraft Lease Rental Capitalized interest Interest Costs Capitalized Adjustment City Area Code City Area Code Accumulated other comprehensive income AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Subsequent Events Subsequent Events [Text Block] Name Forgone Recovery, Individual Name Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] TOTAL ASSETS: Assets Operating lease right-of-use assets, net operating right of use asset, net operating right of use asset, net Accrued pilot retention bonus Accrued Retention Bonus Accrued Retention Bonus Other Secured Debt Other Secured Debt [Member] Other Secured Debt PEO PEO [Member] 2028 Long-Term Debt, Maturity, Year Two Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Cash Equivalents Cash Equivalents [Member] Other noncurrent liabilities Other Liabilities, Noncurrent Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Subsequent Event Type Subsequent Event Type [Domain] Retained earnings Retained Earnings [Member] Noncurrent operating lease liabilities Operating Lease, Liability, Noncurrent Total operating expenses Operating Expenses Money market funds Money Market Funds [Member] Revolving Credit Facility Revolving Credit Facility [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Award Timing Disclosures [Line Items] Debt issuance costs Payments of Debt Issuance Costs Corporate debt securities Corporate Debt Securities [Member] Diluted (in dollars per share) Earnings (loss) per share, diluted (in dollars per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Capitalized interest Interest Costs Capitalized Fair Value, Liabilities Measured on Recurring Basis Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] 2029 Long-Term Debt, Maturity, Year Three Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Passenger Revenue from Contract with Customer, Excluding Assessed Tax Revenue from Contract with Customer, Excluding Assessed Tax Property and equipment, net Property and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Financial Instruments [Domain] Financial Instruments [Domain] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Revenue Recognition Revenue from Contract with Customer [Text Block] Principal payments on debt and finance lease obligations Repayments of Debt and Lease Obligation Points redeemed (recognition of revenue) Points redeemed Points redeemed Other investing activities Payment for (Proceeds from) Other Investing Activity Maintenance and repairs Airline, Maintenance and Repair Expenses Segment Reporting [Table] Segment Reporting [Table] Schedule of Maturities of Long-Term Debt Schedule of Maturities of Long-Term Debt [Table Text Block] Long-term Debt, Weighted Average Interest Rate, at Point in Time Long-Term Debt, Weighted Average Interest Rate, at Point in Time Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Purchases of property and equipment in accrued liabilities and other Purchases of Property and Equipment in Accrued Liabilities Purchases of Property and Equipment in Accrued Liabilities All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] OPERATING INCOME Operating Income (Loss) Current Fiscal Year End Date Current Fiscal Year End Date Revenue Recognition [Abstract] Revenue Recognition [Abstract] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Special charges Special Item - Impairment charges Special Item - Impairment charges 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] Cash dividends declared per share (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Measure: Measure [Axis] Senior Secured Revolving Loan Facility Senior Secured Revolving Loan Facility [Member] Senior Secured Revolving Loan Facility Revenue from Contract with Customer, Concentration Percentage Revenue from Contract with Customer, Concentration Percentage Revenue from Contract with Customer, Concentration Percentage Long Term Investments Long Term Investments [Member] -- None. No documentation exists for this element. -- Shares used for computation: Weighted average shares outstanding used in computing earnings per share to common stockholders: [Abstract] -- None. No documentation exists for this element. -- Equity Components [Axis] Equity Components [Axis] Other Other Cost and Expense, Operating Product and Service [Domain] Product and Service [Domain] Airline Airline [Member] Airline Income tax refunds Income Tax Paid, after Refund Received Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Entity Interactive Data Current Entity Interactive Data Current Total debt and finance lease obligations Long-Term Debt [Member] Deferred income taxes Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Termination Date Trading Arrangement Termination Date Property, Plant, and Equipment [Line Items] Property, Plant, and Equipment [Line Items] Aircraft pre-delivery deposits Aircraft Pre-delivery Deposits Aircraft Pre-delivery Deposits Third party products Third party products Revenue generated from third party products through the sale of hotel rooms, ground transportation (rental cars and hotel shuttle products), attraction and show tickets and fees we receive from other merchants selling products through our website, net of amounts paid or payable to wholesale providers, travel agent commissions and credit card processing fees associated with sale of third party products. Subsequent Events [Abstract] Subsequent Events [Abstract] Proposed Acquisition of Sun Country Airlines Holdings, Inc. Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Rooms Rooms [Member] Rooms Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Interest income Interest Income (Expense), Operating MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Deposits and other assets Other Assets, Noncurrent Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Document Type Document Type Barclays Bank PLC Barclays Bank PLC [Member] Barclays Bank PLC Accrued liabilities Accrued Liabilities, Current Fair Value as of Grant Date Award Grant Date Fair Value Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Subsequent Event [Line Items] Subsequent Event [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Proceeds from the issuance of debt and finance lease obligations Proceeds from Issuance of Long-Term Debt Local Phone Number Local Phone Number Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name INCOME BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Total operating revenues Revenues Revenues Total property and equipment Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Contract With Customer, Liability [Roll Forward] Contract With Customer, Liability [Roll Forward] Contract With Customer, Liability All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Fair Value, Inputs, Level 3 Fair Value, Inputs, Level 3 [Member] SUPPLEMENTAL DISCLOSURE OF NONCASH TRANSACTIONS: Supplemental Cash Flow Information [Abstract] Shares repurchased by the Company and held as treasury shares (in shares) Treasury Stock, Shares, Acquired PEO Name PEO Name Diluted (in shares) Adjusted weighted-average shares outstanding under two-class method (in shares) Two-Class Method, Weighted Average Number of Shares Outstanding, Diluted Two-Class Method, Weighted Average Number of Shares Outstanding, Diluted Restricted cash Restricted Cash Beginning balance Ending balance Contract with Customer, Liability Long-Lived Asset, Class [Axis] Long-Lived Asset, Class [Axis] Sun Country Sun Country [Member] Sun Country Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Notes Payable Notes Payable Shares repurchased by the Company and held as treasury shares Treasury Stock, Value, Acquired, Cost Method Number of flight simulators Number Of Flight Simulators Number Of Flight Simulators CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT BEGINNING OF PERIOD CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT END OF PERIOD Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Accrued pilot retention bonus Increase (Decrease) In Accrued Retention Bonus Increase (Decrease) In Accrued Retention Bonus Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] 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] TOTAL COMPREHENSIVE INCOME Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Measurement Frequency [Domain] Measurement Frequency [Domain] Debt Instrument [Axis] Debt Instrument [Axis] Subsequent Event [Table] Subsequent Event [Table] Salaries and benefits Labor and Related Expense Ancillary air-related charges Air-related revenue [Member] Air-related revenue [Member] Business combination, consideration transferred, equity interests issued and issuable, cash paid per acquiree share Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Cash Paid Per Acquiree Share Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Cash Paid Per Acquiree Share Summary of Long-Term Debt Schedule of Debt [Table Text Block] 2027 Long-Term Debt, Maturity, Year One Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic (in dollars per share) Net income per share, basic (in dollars per share) Earnings Per Share, Basic Repurchase of common stock Payments for Repurchase of Common Stock Air traffic liability Contract with Customer, Liability, Current Contract with Customer, Liability, Current TOTAL CURRENT ASSETS Assets, Current Noncash Merger Related Costs Noncash Merger Related Costs Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Long-term debt and capital leases, net of current maturities and related costs Long-Term Debt, Excluding Current Maturities Award Type Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Retained earnings Retained Earnings (Accumulated Deficit) Contract with Customer, Liability, Credit Voucher Bookings Contract with Customer, Liability, Credit Voucher Bookings Contract with Customer, Liability, Credit Voucher Bookings Noncurrent loyalty program liability Loyalty Program Liability, Noncurrent Loyalty Program Liability, Noncurrent Product and Service [Axis] Product and Service [Axis] Consolidated Variable Interest Entities Due 2029 Consolidated Variable Interest Entities Due 2029 [Member] Consolidated Variable Interest Entities Due 2029 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] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Debt Instrument, Unused Borrowing Capacity, Amount Debt Instrument, Unused Borrowing Capacity, Amount Common Stock Common Stock [Member] Debt Securities, Available-for-Sale Debt Securities, Available-for-Sale Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Integration costs Integration Costs [Member] Integration Costs Share-based compensation (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Third Party Product Revenue Third Party Product Revenue [Member] Third Party Product Revenue Equity Awards Adjustments Equity Awards Adjustments [Member] Transportation security administration assessments Transportation Security Administration Assessments Transportation Security Administration Assessments TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY: Liabilities and Equity Expendable parts, supplies and fuel, net Expendable parts, supplies and fuel, net of allowance Net amount, as of the balance sheet date, of expendable parts, supplies and fuel to be used in air transport of passengers. 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] Segments [Axis] Segments [Axis] Aircraft fuel Aircraft Fuel Aircraft Fuel Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Asset Class [Axis] Asset Class [Axis] Airline special charges Restructuring Charges Weighted average fixed-interest rate on debt Fixed Rate [Member] Fixed Rate [Member] Tabular List, Table Tabular List [Table Text Block] Additional paid in capital Additional Paid in Capital Other non-operating expense Other Nonoperating Income (Expense) Long-Term Debt Long-Term Debt [Text Block] Short-Term Investments Short-Term Investments [Member] 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] Less income allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Fixed fee contracts Fixed fee contract revenue Revenue generated from fixed fee agreements and charter service on a seasonal and ad-hoc basis. Accounts receivable Receivables, Net, Current Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Adjustment to Compensation: Adjustment to Compensation [Axis] Number of aircraft retired Number Of Aircraft Retired Number Of Aircraft Retired Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Payments to Acquire Productive Assets Payments to Acquire Productive Assets Interest paid, net of amount capitalized Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Business Insurance Recoveries [Table] Business Insurance Recoveries [Table] Less income allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Credit Facility [Axis] Credit Facility [Axis] Special Charges Restructuring and Related Activities Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Long-term debt and finance lease obligations, net of current maturities and related costs Long-Term Debt and Lease Obligation Discontinued Operations and Disposal Groups [Abstract] 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] Scheduled service Scheduled Service Revenue [Member] Scheduled Service Revenue [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Sunseeker special charges, net of insurance recoveries Restructuring Charges, Net Of Recoveries Restructuring Charges, Net Of Recoveries Additional paid-in capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Short-term investments Short-Term Investments Current loyalty program liability Loyalty Program Liability, Current Loyalty Program Liability, Current Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Company Selected Measure Amount Company Selected Measure Amount CASH PAYMENTS FOR: Non- cash transactions: [Abstract] -- None. No documentation exists for this element. -- Net income attributable to common stock Net income attributable to common stock (in Dollars) The portion of profit or loss for the period, net of income taxes, which is attributable to the parent, and if applicable, reduced by earnings allocated (not distributed) to participating securities under the two-class method to the extent that participating securities may share in earnings as if all of the earnings for the period had been distributed. Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 2031 Long-Term Debt, Maturity, Year Five CURRENT ASSETS Assets, Current [Abstract] Non-PEO NEO Non-PEO NEO [Member] Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One INCOME TAX PROVISION Income tax expense (benefit) Income Tax Expense (Benefit) Award Timing Method Award Timing Method [Text Block] Other Product and Service, Other [Member] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Revolving Credit Facilities Due 2027 Revolving Credit Facilities Due 2027 [Member] Revolving Credit Facilities Due 2027 Non-Publicly Held Debt Non-Publicly Held Debt [Member] Non-Publicly Held Debt [Member] NET INCOME NET INCOME Net income Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Credit loss on note receivable Credit Loss On Note Receivable [Member] Credit Loss On Note Receivable Certificates of deposit Certificates of Deposit [Member] Interest income Investment Income, Interest Weighted average variable-interest rate on debt Variable Rate [Member] Variable Rate [Member] Contract with Customer, Contract Asset, Contract Liability, and Receivable Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]