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REVENUE RECOGNITION (Tables)
 12 Months Ended
Dec. 31, 2022
Revenue from Contract with Customer [Abstract]  
Schedule of disaggregation of revenue
Passenger revenue is composed of passenger ticket sales, loyalty travel awards and travel-related services performed in conjunction with a passenger’s flight.

Passenger revenue by category
Year Ended December 31,
(in millions)202220212020
Ticket$35,626 $19,339 $10,970 
Loyalty travel awards2,898 1,786 935 
Travel-related services1,694 1,394 978 
Total passenger revenue$40,218 $22,519 $12,883 
Other Revenue
Year Ended December 31,
(in millions)202220212020
Refinery$4,977 $3,229 $1,150 
Loyalty program2,597 1,770 1,458 
Ancillary businesses846 793 648 
Miscellaneous894 556 348 
Total other revenue$9,314 $6,348 $3,604 
Schedule loyalty program activity
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)202220212020
Balance at January 1$7,559 $7,182 $6,728 
Miles earned3,419 2,238 1,437 
Travel miles redeemed(2,898)(1,786)(935)
Non-travel miles redeemed(198)(75)(48)
Balance at December 31$7,882 $7,559 $7,182 
Schedule of revenue by geographic region Our passenger and operating revenue by geographic region is summarized in the following table:
Revenue by geographic region
Passenger RevenueOperating Revenue
Year Ended December 31,Year Ended December 31,
(in millions)202220212020202220212020
Domestic$30,197 $18,468 $10,041 $38,478 $24,320 $13,339 
Atlantic6,093 1,777 1,171 7,429 2,537 1,649 
Latin America2,889 1,873 1,113 3,334 2,284 1,321 
Pacific1,039 401 558 1,341 758 786 
Total$40,218 $22,519 $12,883 $50,582 $29,899 $17,095