00100 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 00200 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS link:presentationLink link:calculationLink link:definitionLink 00400 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 00405 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parentheticals) link:presentationLink link:calculationLink link:definitionLink 40704 - Disclosure - DEBT - Future maturities of the outstanding Debt (Details) link:presentationLink link:calculationLink link:definitionLink 40704 - Disclosure - DEBT - Future maturities of the outstanding Debt (Details) (Calc 2) link:presentationLink link:calculationLink link:definitionLink 40801 - Disclosure - FUEL DERIVATIVES AND RISK MANAGEMENT (Details) link:presentationLink link:calculationLink link:definitionLink 41101 - Disclosure - SPECIAL ITEMS, NET - Schedule of special items, net (Details) link:presentationLink link:calculationLink link:definitionLink 41301 - Disclosure - OPERATING SEGMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 00300 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 40102 - Disclosure - COMPANY BACKGROUND - Initial Public Offering (Details) link:presentationLink link:calculationLink link:definitionLink 40103 - Disclosure - COMPANY BACKGROUND (Details) link:presentationLink link:calculationLink link:definitionLink 40301 - Disclosure - IMPACT OF THE COVID19 PANDEMIC (Details) link:presentationLink link:calculationLink link:definitionLink 40401 - Disclosure - REVENUE - Disaggregation of Operating Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 40402 - Disclosure - REVENUE - Contract Balances (Details) link:presentationLink link:calculationLink link:definitionLink 40403 - Disclosure - REVENUE (Details) link:presentationLink link:calculationLink link:definitionLink 40403 - Disclosure - REVENUE Default (Details) link:presentationLink link:calculationLink link:definitionLink 40404 - Disclosure - Revenue - Loyalty Program (Details) link:presentationLink link:calculationLink link:definitionLink 40502 - Disclosure - EARNINGS PER SHARE (Details) link:presentationLink link:calculationLink link:definitionLink 40601 - Disclosure - AIRCRAFT - Owned and Leased - Aircraft fleet (Details) link:presentationLink link:calculationLink link:definitionLink 40602 - Disclosure - AIRCRAFT - Owned and Leased - Aircraft Lease Payment Deferrals (Details) link:presentationLink link:calculationLink link:definitionLink 40603 - Disclosure - AIRCRAFT - Owned and Leased - Aircraft Maintenance Deposits Contra-Assets (Details) link:presentationLink link:calculationLink link:definitionLink 40701 - Disclosure - DEBT - Lines of Credit (Details) link:presentationLink link:calculationLink link:definitionLink 40702 - Disclosure - DEBT - Long-term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 40703 - Disclosure - DEBT - Long-term Debt schedule (Details) link:presentationLink link:calculationLink link:definitionLink 40901 - Disclosure - FAIR VALUE MEASUREMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 41001 - Disclosure - INCOME TAXES (Details) link:presentationLink link:calculationLink link:definitionLink 41401 - Disclosure - SUBSEQUENT EVENTS (Details) link:presentationLink link:calculationLink link:definitionLink 00090 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 00105 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 10101 - Disclosure - COMPANY BACKGROUND link:presentationLink link:calculationLink link:definitionLink 10201 - Disclosure - BASIS OF PRESENTATION link:presentationLink link:calculationLink link:definitionLink 10301 - Disclosure - IMPACT OF THE COVID19 PANDEMIC link:presentationLink link:calculationLink link:definitionLink 10401 - Disclosure - REVENUE link:presentationLink link:calculationLink link:definitionLink 10501 - Disclosure - EARNINGS PER SHARE link:presentationLink link:calculationLink link:definitionLink 10601 - Disclosure - AIRCRAFT - Owned and Leased link:presentationLink link:calculationLink link:definitionLink 10701 - Disclosure - DEBT link:presentationLink link:calculationLink link:definitionLink 10801 - Disclosure - FUEL DERIVATIVES AND RISK MANAGEMENT link:presentationLink link:calculationLink link:definitionLink 10901 - Disclosure - FAIR VALUE MEASUREMENTS link:presentationLink link:calculationLink link:definitionLink 11001 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 11101 - Disclosure - SPECIAL ITEMS, NET link:presentationLink link:calculationLink link:definitionLink 11201 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 11301 - Disclosure - OPERATING SEGMENTS link:presentationLink link:calculationLink link:definitionLink 11401 - Disclosure - SUBSEQUENT EVENTS link:presentationLink link:calculationLink link:definitionLink 20202 - Disclosure - BASIS OF PRESENTATION (Policies) link:presentationLink link:calculationLink link:definitionLink 30403 - Disclosure - REVENUE (Tables) link:presentationLink link:calculationLink link:definitionLink 30503 - Disclosure - EARNINGS PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 30603 - Disclosure - AIRCRAFT - Owned and Leased (Tables) link:presentationLink link:calculationLink link:definitionLink 30703 - Disclosure - DEBT (Tables) link:presentationLink link:calculationLink link:definitionLink 30803 - Disclosure - FUEL DERIVATIVES AND RISK MANAGEMENT (Tables) link:presentationLink link:calculationLink link:definitionLink 30903 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 31103 - Disclosure - SPECIAL ITEMS, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 31303 - Disclosure - OPERATING SEGMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 40101 - Disclosure - COMPANY BACKGROUND- Stock split (Details) link:presentationLink link:calculationLink link:definitionLink 40201 - Disclosure - BASIS OF PRESENTATION (Details) link:presentationLink link:calculationLink link:definitionLink 40501 - Disclosure - EARNINGS PER SHARE - Computation of basic and diluted earnings (Details) link:presentationLink link:calculationLink link:definitionLink 40705 - Disclosure - DEBT - Measured at fair value (Details) link:presentationLink link:calculationLink link:definitionLink 41102 - Disclosure - SPECIAL ITEMS, NET (Details) link:presentationLink link:calculationLink link:definitionLink