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REVENUE RECOGNITION (Tables)
 6 Months Ended
Jun. 30, 2024
Revenue from Contract with Customer [Abstract]  
Schedule of Disaggregation of Revenue
Passenger Revenue
Three Months Ended June 30,
Six Months Ended June 30,
(in millions)2024202320242023
Ticket$12,349 $11,829 $22,182 $21,068 
Loyalty travel awards975 902 1,820 1,645 
Travel-related services517 474 970 903 
Passenger revenue$13,841 $13,205 $24,972 $23,616 
Other Revenue
Three Months Ended June 30,
Six Months Ended June 30,
(in millions)2024202320242023
Refinery$1,251 $965 $2,436 $1,882 
Loyalty program836 774 1,631 1,500 
Ancillary businesses213 214 393 445 
Miscellaneous318 248 597 513 
Other revenue$2,618 $2,201 $5,057 $4,340 
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)20242023
Balance at January 1$8,420 $7,882 
Miles earned2,148 2,110 
Miles redeemed for air travel(1,820)(1,645)
Miles redeemed for non-air travel and other(114)(80)
Balance at June 30
$8,634 $8,267 
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 June 30,
Six Months Ended June 30,
(in millions)2024202320242023
Domestic$9,398 $8,944 $17,381 $16,538 
Atlantic2,825 2,803 4,130 4,047 
Latin America964 926 2,229 2,058 
Pacific654 532 1,232 973 
Total$13,841 $13,205 $24,972 $23,616 

Operating revenue by geographic region
Three Months Ended June 30,
Six Months Ended June 30,
(in millions)2024202320242023
Domestic$11,575 $10,749 $21,607 $20,145 
Atlantic3,210 3,178 4,791 4,726 
Latin America1,102 1,037 2,543 2,317 
Pacific771 614 1,465 1,149 
Total$16,658 $15,578 $30,406 $28,337