Montreal Mirabel International Airport, located in Montreal, Canada, is the second-busiest airport in the country and the third busiest in Quebec. The airport has been in operation since 1975, when it was opened by the Canadian government to replace Montreal's Dorval Airport (now known as Pierre Elliott Trudeau International Airport).

The airport was named after the nearby town of Mirabel, which was founded in 1670. The town was named after the French family of Louis-Joseph and Marie-Louise Mirabel, who donated the land on which the airport was built. The name Mirabel was chosen to commemorate the family's contribution to the region.

The airport code for Montreal Mirabel International Airport is YMX. This is derived from the French spelling of the airport's name, Mirabel, which is spelled M-I-R-A-B-E-L. The first two letters of the spelling, M-I, are used for the airport code.

Montreal Mirabel International Airport currently serves approximately 300 flights each day, with the majority of these flights being domestic flights within Canada. The airport is served by major airlines including Air Canada, WestJet, Air Transat, and Porter Airlines. It is also served by several regional carriers and charter airlines.

In recent years, the airport has seen a decline in passenger traffic due to the opening of the larger, more modern Montreal Pierre Elliott Trudeau International Airport. Despite this, Montreal Mirabel International Airport is still an important part of the region, serving as the primary gateway to northern Quebec and the Maritimes.

Montreal Mirabel International Airport is a popular destination for tourists, business travellers and cargo operations, providing access to the greater Montreal region. It is one of the most important airports in the country, and its name is a reminder of the contributions made by the Mirabel family.