It also marked the seventh successive year that the gateway has registered an upurn in passenger numbers.
The results, say Aéroports de Montréal (ADM), strengthen its third-place ranking on the list of Canada’s busiest airports.
“Air travel in Canada has been in a golden age for a number of years now,” enthuses ADM's new president and CEO, Philippe Rainville.
“The main reason for this has been Air Canada’s expansionary strategy, supported by low fuel prices and a favourable exchange rate.
"Aéroports de Montréal is very proud to have planned and built, in a timely manner, the new facilities it needed to take full advantage of that growth. The entire Montréal community is now reaping the benefits.”
Rainville continues: “If the present trend continues, our annual traffic will be in the neighbourhood of 20 million passengers by 2020, propelling Montréal–Trudeau to the next level.
"The prospects for 2017 are already very promising: Air Canada’s new daily route linking Montréal and Shanghai, which will be inaugurated on February 16, is expected to generate some 125,000 yearly passengers, including large numbers of tourists from China; meanwhile, Air Transat’s roster of destinations is expanding to include Tel Aviv.”
All three traffic sectors contributed to the increase. The biggest surprise was in domestic arrivals and departures, which surged by nearly 9.7% in 2016, with the Montréal–Toronto route proving especially busy.
Traffic in the international sector was up by 5.9%, remaining vigorous thanks in part to the arrival of new carriers, including Air China, which completed its first full year of operations at Montréal–Trudeau in 2016.
Flights to and from Europe also hit new highs during the summer, reflecting the increased capacity deployed by Air Canada, Air Transat and international airlines alike.
Transborder (Canada–US) traffic, meanwhile, grew by 4.3%, with destinations in the American West (Los Angeles, San Francisco and Las Vegas, along with newly added Denver) and the three New York City airports strongly driving up demand.