SOUTHWEST AIRLINES CO revenue for the last year amounted to 23.64 B EUR, the most of which — 21.42 B EUR — came from its highest performing source at the moment, Passenger, the year earlier bringing 20.00 B EUR. The greatest contribution to the revenue figure was made by United States — last year it brought SOUTHWEST AIRLINES CO 22.65 B EUR, and the year before that — 21.49 B EUR.