Major computer failure causes disruptions at Montreal airport

Cancelled and delayed Air Canada flights are seen on the departure board at Montreal-Pierre Elliott Trudeau International Airport in Dorval, Que., Friday, Aug. 15, 2025. (Christinne Muschi/The Canadian Press)

A system failure disrupted operations and delayed flights at Montreal-Trudeau Airport Saturday morning.

The airport told CTV News in an email the outage started around 6:45 a.m.

The airport warned that passenger check-in was slowed and schedules on its website were not being updated in a message on social media.

“Please make sure to validate your departure or arrival information on your airline’s website,” it said.

The airport said systems were gradually being restarted around 8:25 a.m. and are now operational.

Passenger check-in is open.

According to the airport, the failure was caused by a service provider.