v3.26.3
REVENUE RECOGNITION - Schedule of Deferred Revenue (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Disaggregation of Revenue [Line Items]    
Deferred revenue - total $ 595,206 $ 738,852
Flights - prepaid    
Disaggregation of Revenue [Line Items]    
Deferred revenue - total 587,934 726,506
Memberships - annual dues    
Disaggregation of Revenue [Line Items]    
Deferred revenue - total 3,469 10,328
Flights - credits    
Disaggregation of Revenue [Line Items]    
Deferred revenue - total 0 2,018
Other    
Disaggregation of Revenue [Line Items]    
Deferred revenue - total $ 3,803 $ 0