Systems fully operational at Montreal Trudeau airport after hours of ‘connectivity problems’
Posted March 25, 2025 8:59 am.
Last Updated March 25, 2025 11:42 pm.
“Connectivity problems” on several Montreal-Pierre Elliott Trudeau International Airport systems that caused a slowdown in operations Tuesday, including flight delays for several hours, is over.
Aéroports de Montréal (ADMTL) said just before 10:30 p.m. on Tuesday that their systems were back in operation.
Earlier in the day, ADMTL said the airport was operational, but travelers saw hours-long delays at check-ins and security checkpoints.
ADMTL media relations advisor Eric Forest told CityNews, that “a contingency plan has been deployed and our teams are working to restore the situation as soon as possible.”
However, the airport saw around 12 hours worth of delays or even flights pushed to Wednesday. Additionally, service will begin gradually, and travellers are advised to check their flight schedule before heading to YUL.
“The service provider in charge of telecoms for YUL carried out a software update on the equipment last night,” explained Forest. “Which caused several systems to fail.”
An investigation is underway to determine the source of the problem that caused the outage.
Forest explains that “corrective and preventive measures will be deployed in the network architecture in conjunction with the suppliers concerned.”
More on the delays earlier in the day
Connectivity problems on several YUL systems are causing a slowdown in airport operations.
— YUL Aéroport international Montréal-Trudeau (@yulaeroport) March 25, 2025
Delays are to be expected at check-in and security checkpoints. A contingency plan has been deployed and our teams are working to restore the situation as soon as possible.
Thank you for… pic.twitter.com/x0STf30xib
As of 9:00 a.m. Tuesday morning, the wait and delays are mainly at check-in for Air Canada and Sunwing domestic/international flights.
“We recommend as usual that all passengers, regardless of destination or airline, plan ahead and arrive at the airport well in advance with that in mind,” Forest explained.
UPDATE
— YUL Aéroport international Montréal-Trudeau (@yulaeroport) March 25, 2025
Systems connectivity problem at YUL: the situation is still ongoing, which is considerably slowing down passenger processing, particularly at check-in. Flight schedules on our website are not being updated, so please make sure to validate your departure or arrival…
In an update at 9:21 a.m. posted to social media, the airport said that the situation is still ongoing, which is considerably slowing down passenger processing, particularly at check-in.
Adding that flight schedules on their website are not being updated.
“Please make sure to validate your departure or arrival information on your airline’s website,” they wrote. “Our teams are currently working with our supplier’s team to rectify the situation.”
UPDATE #2
— YUL Aéroport international Montréal-Trudeau (@yulaeroport) March 25, 2025
The situation is still ongoing at YUL. Plan your travels, regardless of your destination, and if possible, please register online, before coming to YUL.
At 11:27 a.m. the airport, once again sharing on social media, said that the situation is still ongoing at YUL.
“Plan your travels, regardless of your destination,” they added. “And if possible, please register online, before coming to YUL.”
“The ADM website chat service is also accessible,” said Forest. “Agents are available to respond to travellers.”
As of 3:30 p.m. Forest told CityNews that the system connectivity problems affecting operations at YUL are still ongoing.
“Alternative solutions have been deployed, enabling some systems to be operational again,” he said. “But delays are to be expected due to this exceptional situation.”
“This outage does not affect air navigation systems, so aircraft continue to take off and land, despite schedule delays.”
For the next few hours, travellers are advised to:
1. Check their flight schedule on their air carrier’s website.
2. Arrive at least 4 hours early.
3. Check in online before arriving at the airport
4. For those without checked baggage, proceed directly to the security checkpoint.
