Montréal–Pierre Elliott Trudeau International Airport (IATA: YUL, ICAO: CYUL) (French: Aéroport international Pierre-Elliott-Trudeau de Montréal) or Montréal–Trudeau, formerly known as Montréal–Dorval International Airport (Aéroport international Montréal-Dorval), is an international airport serving Montreal, Quebec, Canada, located on the Island of Montreal, 20 km from Downtown Montreal. The airport terminals are located entirely in the suburb of Dorval, while one runway is located in the Montreal borough of Saint-Laurent. Air Canada, the country's flag carrier, also has its corporate headquarters complex on the Saint-Laurent side of the airport. It also serves Greater Montreal and adjacent regions in Quebec and eastern Ontario, as well as the states of Vermont and northern New York in the United States. The airport is named in honour of Pierre Elliott Trudeau, the 15th Prime Minister of Canada and father of current Prime Minister Justin Trudeau.
The airport is one of two managed and operated by Aéroports de Montréal (ADM) ; the other being Montréal–Mirabel northwest of Montreal, which was initially intended to replace the one in Dorval but now deals almost solely with cargo.
Trudeau is the busiest airport in the province of Quebec and the third-busiest airport in Canada by both passenger traffic and aircraft movements, with 19.42 million passengers and 240,159 movements in 2018. It is one of eight Canadian airports with United States border preclearance and is one of the main gateways into Canada with 12.2 million or 63% of its passengers being on non-domestic flights, the highest proportion amongst Canada's airports during 2018. It is one of four Air Canada hubs and, in that capacity, serves mainly Quebec, the Atlantic Provinces and Eastern Ontario. On an average day, 53,000 passengers transit through Montréal-Trudeau.
Airlines servicing Trudeau offer year-round non-stop flights to five continents, namely Africa, Asia, Europe, North America and South America. It is one of only two airports in Canada with direct flights to five continents or more, the other being Toronto Pearson International Airport. Trudeau airport is the headquarters of and a large hub for Air Canada, the country's largest airline. It is also the headquarters of Air Inuit and Air Transat, and an operation base for Sunwing Airlines and Porter Airlines. Bombardier Aerospace has an assembly facility on site where they build regional jets and Challenger business jets.