REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 1,579,760	$ 1,194,259	$ 694,981
Services transferred at a point in time: | Flights, net of discounts and fees
Disaggregation of Revenue [Line Items]
Revenue	1,073,094	873,724	495,419
Services transferred at a point in time: | Aircraft management
Disaggregation of Revenue [Line Items]
Revenue	232,248	215,368	124,881
Services transferred at a point in time: | Other
Disaggregation of Revenue [Line Items]
Revenue	166,732	20,910	9,392
Services transferred over time: | Memberships
Disaggregation of Revenue [Line Items]
Revenue	90,132	69,592	54,622
Services transferred over time: | Aircraft management
Disaggregation of Revenue [Line Items]
Revenue	9,784	9,897	7,848
Services transferred over time: | Other
Disaggregation of Revenue [Line Items]
Revenue	$ 7,770	$ 4,768	$ 2,819