Ottawa/Macdonald–Cartier International Airport or simply Ottawa International Airport is the main international airport serving Ottawa, Ontario, Canada, and its metropolitan area as well as Gatineau, Quebec known as the National Capital Region. It is named after the Canadian statesmen and two of the "founding fathers of Canada", Sir John A. Macdonald and Sir George-Étienne Cartier. Located 5.5 nautical miles south of downtown Ottawa in the south end of the city, it is Canada's sixth-busiest airport, Ontario's second-busiest airport by airline passenger traffic, with 4,606,824 passengers in 2024. In a typical year, the airport is used by over 5 million passengers. The airport is a hub for Porter Airlines, a focus city for Air Canada and a home base for Canadian North.