The global computer outage that affected many services on Friday morning also had an impact in Canada, particularly at airports.
Toronto Pearson International Airport has warned travellers that technical issues could disrupt schedules for some airlines later today.
Passengers are therefore invited to check the status of their flight and contact their airline for more details on their personal situation.
At Montreal-Trudeau International Airport, the departure times of some flights scheduled for Friday morning have been pushed back, while some other flights have been cancelled. Flights to Vancouver, Toronto, Boston and San Francisco have been grounded.
Flight tracking service FlightAware listed seven cancellations and 31 delays for WestJet flights, as well as three cancellations and 19 delays for Air Canada.
Computer outages are affecting operations at airports, banks and media outlets around the world on Friday. The problems are particularly affecting businesses.
The outage is believed to be caused by an update that cybersecurity firm CrowdStrike rolled out to its Windows users. The company says the issue causing the outage is not a security incident or cyberattack.
The problem also affects Microsoft 365 applications and services. The disruptions increased hours after the technology company said it was gradually restoring its services.
With information from the Associated Press
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