Montréal–Mirabel International Airport, originally called Montréal International Airport, widely known as Mirabel and branded as YMX International Aerocity of Mirabel, is a cargo and former international passenger airport in Mirabel, Quebec, Canada, 21 nautical miles northwest of Montreal. It opened on October 4, 1975, and the last commercial p…Montréal–Mirabel International Airport, originally called Montréal International Airport, widely known as Mirabel and branded as YMX International Aerocity of Mirabel, is a cargo and former international passenger airport in Mirabel, Quebec, Canada, 21 nautical miles northwest of Montreal. It opened on October 4, 1975, and the last commercial passenger flight took off on October 31, 2004.