v3.26.1
REVENUE RECOGNITION - Schedule of Deferred Revenue (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Disaggregation of Revenue [Line Items]    
Deferred revenue - total $ 626,891 $ 738,852
Flights - prepaid    
Disaggregation of Revenue [Line Items]    
Deferred revenue - total 616,971 726,506
Memberships - annual dues    
Disaggregation of Revenue [Line Items]    
Deferred revenue - total 5,334 10,328
Flights - credits    
Disaggregation of Revenue [Line Items]    
Deferred revenue - total 673 2,018
Other    
Disaggregation of Revenue [Line Items]    
Deferred revenue - total $ 3,913 $ 0