It is the third busiest domestic airport after Taipei Songshan Airport and Kaohsiung Airport. However its passenger number dropped significantly since 2007 after the inauguration of Taiwan High Speed Rail. The Far Eastern Air Transport suspended the service between Tainan Airport and Taipei Songshan Airport on March 1, 2008, ending this carrier's 50-year service history in the Tainan Airport. Its competitor, TransAsia Airways, also had to downgrade the aircraft from jet Airbus A320 to turboprop ATR 72 to maintain revenue, and finally decided to quit this airport since August 1, 2008.
Because of the share use with the Air Force, the airport terminal was built quite a distance away from the airfield. Passengers disembark at the apron and board shuttle buses to the terminal. Also because of the share use, some flights will be cancelled when the Air Force is conducting war games.