Thunder Bay Airport (IATA: YQT, ICAO: CYQT) is in the city of Thunder Bay, Ontario, Canada. With 108,130 aircraft movements in 2012, it was the fourth busiest airport in Ontario and the 16th busiest airport in Canada. During the same year, more than 761,000 passengers went through the airport.

The airport is classified as an airport of entry by Nav Canada and is staffed by the Canada Border Services Agency (CBSA). CBSA officers at this airport can handle aircraft with up to 40 passengers.

The reference of "International" in the name of the Thunder Bay International Airport Authority Inc. (TBIAAI) is used for business purposes only. The TBIAAI has not sought to receive official Canadian designation as "International", in accordance with all applicable domestic and international requirements as defined by ICAO Annex 9.