Aéroport Montréal Saint-Hubert Longueuil (AMSL) has an imposing infrastructure, comprising three runways, one of which is 7,840 feet in length, a control tower and wide variety of services including maintenance, refueling, flight schools, chartered flights, regular flights, aircraft parking, customs, restaurants, sale aeronautic equipment and in technical aeronautical training.

Several high-profile companies, employing close to 3,000 people, are also located in the airport zone. These include Pratt & Whitney Canada, which uses the airport as an operations base for its in-flight engine test; the Department of National Defence, which uses the airport as a training site for military flights; the Canadian Space Agency; and Mel's Cité du Cinéma. The École nationale d'aérotechnique, a leader in technical aeronautics training in Quebec, is also located at the airport.