Spirit Airlines, Inc. revenue for the last year amounted to 5.36 B USD, the most of which — 5.27 B USD — came from its highest performing source at the moment, Air Transportation for Passengers, the year earlier bringing 4.99 B USD. The greatest contribution to the revenue figure was made by United States — last year it brought Spirit Airlines, Inc. 4.68 B USD, and the year before that — 4.37 B USD.