Later on Wednesday, airlines began restarting their services, but on alternate routes.
The airline said its Toronto to Mumbai flight will operate on time Wednesday night, but on a different route.
Due to a lack of suitable alternative routes to Delhi, Air Canada said it has cancelled its Wednesday night flights from Toronto and Vancouver.
“We continue to monitor this situation closely and flights to Delhi will operate as soon as operationally feasible,” the airline said in an emailed statement.
Air Canada has enacted its goodwill policy for customers affected by cancellations.
Other airlines affected
Pakistan International Airlines posted on Twitter Wednesday that travellers should “expect delays.”
Air India also tweeted that it is planning to reroute some of its flights to try and minimize delays.