Montreal-US Flights Canceled Due to Smell at Customs

Multiple flights from Montréal-Trudeau International Airport to the United States were disrupted after U.S. Customs and Border Protection operations at the preclearance facility faced temporary delays caused by an unidentified odor. According to airport authorities and local media reports, the incident impacted cross-border travel schedules during peak processing hours.

The operational pause at the U.S. preclearance zone created rolling delays for passengers heading south of the border. Travelers scheduled on afternoon departures experienced longer wait times inside the terminal while officials investigated the source of the smell and ensured the environment met safety standards for travelers and customs personnel.

Impact on Montréal-U.S. Flight Schedules

Aéromontréal and airport officials confirmed that the temporary customs slowdown forced airlines to adjust departure times for several transborder routes. Passengers were advised to check flight statuses directly with their carriers before arriving at the terminal, as U.S. bound flights must clear American customs on Canadian soil before takeoff.

Preclearance operations allow passengers to complete immigration, customs, and agriculture inspections before boarding, meaning any disruption at the border booths immediately halts boarding gates. While normal processing resumed once the investigation concluded, airlines worked to accommodate passengers affected by the missed departure windows.

Airport Response and Safety Checks

Emergency response teams and terminal maintenance personnel inspected the preclearance area following reports of the unusual scent. According to updates provided by airport operations, air quality checks were conducted to rule out hazardous conditions before staff and passengers were permitted back into the affected zone.

Delays gradually cleared as backlogged passengers moved through the customs hall. Airport authorities stated that ground crews prioritized getting delayed aircraft moving as quickly as possible once U.S. border officials authorized the reopening of the inspection counters.