Why not cease night flights at Trudeau altogether?
The airport remains open at all times to accommodate emergencies, air ambulances as well as general aviation (small private aircraft, which generally are not very noisy). In commercial aviation, night flights, including departures before 7 a.m., are vital because they provide the following advantages: FOR PASSENGERS • Return trips can be made in a single day, avoiding overnight hotel stays; • Final destinations with connections to other airports in Canada and U.S. can be reached in a timely manner – for example, the 6:30 a.m.