SOUTHWEST AIRLINES CO revenue for the last year amounted to 443.16 B MXN, the most of which — 401.48 B MXN — came from its highest performing source at the moment, Passenger, the year earlier bringing 417.55 B MXN. The greatest contribution to the revenue figure was made by United States — last year it brought SOUTHWEST AIRLINES CO 424.63 B MXN, and the year before that — 448.61 B MXN.