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REVENUE RECOGNITION - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 196,285	$ 335,062	$ 393,386	$ 686,874
Services transferred at a point in time: | Flights, net of discounts and incentives
Disaggregation of Revenue [Line Items]
Revenue	163,684	235,284	314,613	467,046
Services transferred at a point in time: | Aircraft management
Disaggregation of Revenue [Line Items]
Revenue	2,905	46,073	6,030	107,315
Services transferred at a point in time: | Other
Disaggregation of Revenue [Line Items]
Revenue	13,257	28,138	38,916	59,945
Services transferred over time: | Aircraft management
Disaggregation of Revenue [Line Items]
Revenue	52	2,429	120	4,881
Services transferred over time: | Memberships
Disaggregation of Revenue [Line Items]
Revenue	16,046	21,478	32,900	43,158
Services transferred over time: | Other
Disaggregation of Revenue [Line Items]
Revenue	$ 341	$ 1,660	$ 807	$ 4,529

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