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REVENUE RECOGNITION (Tables)
 3 Months Ended
Mar. 31, 2025
Revenue from Contract with Customer [Abstract]  
Schedule of Disaggregation of Revenue
Passenger Revenue
Three Months Ended March 31,
(in millions)20252024
Ticket$10,068 $9,833 
Loyalty travel awards940 844 
Travel-related services472 454 
Passenger revenue$11,480 $11,131 
Other Revenue
Three Months Ended March 31,
(in millions)20252024
Refinery$1,062 $1,185 
Loyalty program807 795 
Ancillary businesses189 180 
Miscellaneous294 279 
Other revenue$2,352 $2,439 
Schedule of Activity in Loyalty Program Deferred Revenue
The table below presents the activity of the current and noncurrent loyalty program deferred revenue and includes miles earned through travel and miles sold to participating companies, which are primarily through marketing agreements.

Loyalty program activity
(in millions)20252024
Balance at January 1$8,826 $8,420 
Miles earned1,152 1,021 
Miles redeemed for air travel(940)(844)
Miles redeemed for non-air travel and other(60)(56)
Balance at March 31
$8,978 $8,541 
Schedule of Revenue by Geographic Region Our passenger and operating revenue by geographic region is summarized in the following tables:
Passenger revenue by geographic region
Three Months Ended March 31,
(in millions)20252024
Domestic$8,101 $7,983 
Atlantic1,372 1,305 
Latin America1,334 1,265 
Pacific673 578 
Total$11,480 $11,131 

Operating revenue by geographic region
Three Months Ended March 31,
(in millions)20252024
Domestic$10,055 $10,031 
Atlantic1,646 1,581 
Latin America1,523 1,442 
Pacific816 694 
Total$14,040 $13,748