Delta Air Lines, Inc. revenue for the last year amounted to 54.67 B USD, the most of which — 54.67 B USD — came from its highest performing source at the moment, Airline, the year earlier bringing 45.60 B USD. The greatest contribution to the revenue figure was made by United States — last year it brought Delta Air Lines, Inc. 40.84 B USD, and the year before that — 38.48 B USD.