DELTA AIRLINES INC revenue for the last year amounted to 51.77 B CHF, the most of which — 51.77 B CHF — came from its highest performing source at the moment, Airline, the year earlier bringing 46.03 B CHF. The greatest contribution to the revenue figure was made by United States — last year it brought DELTA AIRLINES INC 39.51 B CHF, and the year before that — 34.39 B CHF.