Air Canada announced that all flights to India were temporarily cancelled after one en route to Delhi was forced to turn back to Toronto.
The airline said its Toronto to Mumbai flight will operate on time Wednesday night, but on a different route.
“We are evaluating the routing options for both Toronto-Delhi and Vancouver-Delhi flights scheduled to operate later tonight,” it added.
Air Canada has enacted its goodwill policy for customers affected by cancellations.
The airline operates a daily service from Toronto and Vancouver to Delhi and has a four-times-weekly flight from Toronto to Mumbai. It does not fly to Pakistan.
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.