Air Canada says it is experiencing a system-wide technical issue affecting its airport operations, check-in and call centres.
Spokesman Peter Fitzpatrick says the airline is working to resolve the problem, but did not say when service is expected to be restored.
He says it is expected to result in some flight delays and cancellations.
Toronto Pearson International Airport, as well as the airports in Calgary and Vancouver, say they are working to support Air Canada.
The Toronto airport’s website shows more than two dozen Air Canada flights that were to depart from the city have been delayed.
Fitzpatrick says customers should check their flight status on their local airport websites or sites such as flightaware.com.
“We’re working to resolve this issue as quickly as possible,” he says Tuesday in an email. “We thank customers for their patience and apologize for the inconvenience.”