Thunder Bay Airport is an airport 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.

Thunder Bay is a city in and the seat of Thunder Bay District, Ontario, Canada. It is the most populous municipality in Northwestern Ontario and the second most populous municipality in Northern Ontario; its population is 108,843 according to the 2021 Canadian Census. Located on Lake Superior, the census metropolitan area of Thunder Bay has a population of 123,258 and consists of the city of Thunder Bay, the municipalities of Oliver Paipoonge and Neebing, the townships of Shuniah, Conmee, O'Connor, and Gillies, and the Fort William First Nation.