0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 0000002 - Document - Audit Information link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Consolidated Statements of Operations link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Consolidated Statements of Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Consolidated Statements of Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - Consolidated Statements of Stockholders' Equity (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - REVENUE RECOGNITION link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - FAIR VALUE MEASUREMENTS link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - INVESTMENTS link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - GOODWILL AND INTANGIBLE ASSETS link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - DEBT link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - EMPLOYEE BENEFIT PLANS link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - EQUITY AND EQUITY COMPENSATION link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - EARNINGS PER SHARE link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - SEGMENTS link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - REVENUE RECOGNITION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - INVESTMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - DEBT (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - EMPLOYEE BENEFIT PLANS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - INCOME TAXES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - EQUITY AND EQUITY COMPENSATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - EARNINGS PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - SEGMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Cash, Cash Equivalents, and Restricted Cash Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property and Equipment, net (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - REVENUE RECOGNITION - Passenger Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - REVENUE RECOGNITION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - REVENUE RECOGNITION - Loyalty Program Liability (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - REVENUE RECOGNITION - Other Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - REVENUE RECOGNITION - Other Revenue (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Revenue Recognition - Revenue by Geographic Region (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - FAIR VALUE MEASUREMENTS - Assets/(Liabilities) Measured at Fair Value on a Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - FAIR VALUE MEASUREMENTS- Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - INVESTMENTS - Equity Investments Ownership Interest and Carrying Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - INVESTMENTS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Goodwill and Indefinite-Lived Intangible Assets by Category (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Definite-Lived Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - DEBT - Schedule of Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - DEBT - Schedule of Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - DEBT - 2025 Unsecured Notes (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - DEBT - SkyMiles Credit Facility (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - DEBT - 2026 Term Loan (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - DEBT - Availability Under Revolving Facilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - DEBT - Fair Value of Outstanding Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - DEBT - Covenants (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - DEBT - Future Debt Maturities (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - LEASES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - LEASES - Lease Position (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - LEASES - Lease Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - LEASES - Other Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - LEASES - Undiscounted Cash Flows (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - LEASES - Undiscounted Cash Flows (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - EMPLOYEE BENEFIT PLANS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - EMPLOYEE BENEFIT PLANS - Benefit Obligations, Fair Value of Plan Assets and Funded Status (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - EMPLOYEE BENEFIT PLANS - Balance Sheet Position (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - EMPLOYEE BENEFIT PLANS - Net Periodic Cost (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - EMPLOYEE BENEFIT PLANS - Assumptions Used to Determine Benefit Obligation and Net Periodic Cost (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - EMPLOYEE BENEFIT PLANS - Expected Benefit Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - EMPLOYEE BENEFIT PLANS - Benefit Plan Assets Measured at Fair Value on Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - EMPLOYEE BENEFIT PLANS - Investments Measured at NAV (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - COMMITMENTS AND CONTINGENCIES - Aircraft Purchase Commitments and Contract Carrier Minimum Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - COMMITMENTS AND CONTINGENCIES - Aircraft Purchase Commitments by Fleet Type (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - COMMITMENTS AND CONTINGENCIES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - COMMITMENTS AND CONTINGENCIES - Employees Under Collective Bargaining Agreements (Details) link:presentationLink link:calculationLink link:definitionLink 9955567 - Disclosure - INCOME TAXES - Components of Income Tax Benefit (Provision) (Details) link:presentationLink link:calculationLink link:definitionLink 9955568 - Disclosure - INCOME TAXES - Effective Income Tax Rate Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 9955569 - Disclosure - INCOME TAXES - Deferred Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955569 - Disclosure - INCOME TAXES - Deferred Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955570 - Disclosure - INCOME TAXES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955571 - Disclosure - INCOME TAXES - Valuation Allowance (Details) link:presentationLink link:calculationLink link:definitionLink 9955572 - Disclosure - EQUITY AND EQUITY COMPENSATION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955573 - Disclosure - EQUITY AND EQUITY COMPENSATION - Restricted Stock Award Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955574 - Disclosure - EQUITY AND EQUITY COMPENSATION - Stock Option Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955575 - Disclosure - EARNINGS PER SHARE (Details) link:presentationLink link:calculationLink link:definitionLink 9955576 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) link:presentationLink link:calculationLink link:definitionLink 9955577 - Disclosure - SEGMENTS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955578 - Disclosure - SEGMENTS - Segment Reporting (Details) link:presentationLink link:calculationLink link:definitionLink