The reason Dorval was flooded at the time was because jets all over the world used Dorval as a stopover to refuel. However, the advent of longer range aircraft caused airplanes that used Dorval to refuel to stop landing there. As a result, Dorval was no longer overcrowded.
Since Dorval's capacity problem was relieved, the sizeable Mirabel project remained unnecessary. It has since become quite costly to maintain the airport.
Mirabel International Airport is mainly used for charter flights and cargo flights.
Only two airlines, Air Transat and Corsair provide service into Mirabel. All passenger operations are due to cease in autumn 2004, after which the airport will only handle cargo flights.
On June 23, 1985, Air India Flight 182, which was flying on a Toronto-Montreal-London-Delhi-Mumbai route, exploded in midair, killing all of the passengers aboard.
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