Revenue Recognition (Tables)
9 Months Ended
Sep. 30, 2020
Revenue from Contract with Customer [Abstract]  
Schedule of disaggregation of revenue
Passenger Revenue

Passenger revenue is primarily composed of passenger ticket sales, loyalty travel awards and travel-related services performed in conjunction with a passenger’s flight.
Three Months Ended September 30,
Nine Months Ended September 30,
(in millions)2020201920202019
Ticket$1,634 $10,029 $8,712 $27,986 
Loyalty travel awards143 732 731 2,174 
Travel-related services161 649 742 1,872 
Total passenger revenue$1,938 $11,410 $10,185 $32,032 
Other Revenue
Three Months Ended September 30,
Nine Months Ended September 30,
(in millions)2020201920202019
Ancillary businesses and refinery$572 $291 $1,185 $990 
Loyalty program343 485 1,086 1,443 
Miscellaneous67 185 263 536 
Total other revenue$982 $961 $2,534 $2,969 
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.
(in millions)20202019
Balance at January 1$6,728 $6,641 
Miles earned1,132 2,352 
Travel miles redeemed(731)(2,175)
Non-travel miles redeemed(40)(122)
Balance at September 30
$7,089 $6,696 
Schedule of revenue by geographic region Our passenger and operating revenue by geographic region is summarized in the following tables:
Passenger Revenue
Three Months Ended September 30,
Nine Months Ended September 30,
(in millions)2020201920202019
Domestic$1,647 $7,985 $7,812 $22,819 
Atlantic132 2,062 1,014 5,009 
Latin America97 673 879 2,287 
Pacific62 690 480 1,917 
Total$1,938 $11,410 $10,185 $32,032 

Operating Revenue
Three Months Ended September 30,
Nine Months Ended September 30,
(in millions)2020201920202019
Domestic$2,585 $8,665 $10,116 $24,990 
Atlantic240 2,338 1,353 5,754 
Latin America126 747 1,015 2,547 
Pacific111 810 638 2,277 
Total$3,062 $12,560 $13,122 $35,568