Air Canada issued a travel alert on Tuesday in the face of an “unexpected snow storm” in northeastern United States and predictions of snow in southwestern Ontario.
Flights to and from Toronto, Ottawa, Montreal, London, Ont., Windsor, Ont., and the northeastern U.S. may be cancelled or delayed, the airline said.
Additional flights are expected to be available Tuesday evening from La Guardia airport in New York to Toronto and Montreal; Boston to Toronto; and Newark, N.J., to Toronto.
Air Canada said change fees are waived for affected flights.
Environment Canada said in a special weather statement snow is expected to start falling in southwestern Ontario Tuesday night.
While 10 to 15 centimetres of snow is expected to fall overnight from Windsor to Toronto, and further into Eastern Ontario, the snow will taper off Wednesday, Environment Canada says.
Despite the snow, temperatures will be relatively moderate, with a low of -7 C Tuesday night, and a high of -5 C Wednesday morning, according to Environment Canada.
Good news for travellers as Pearson International Airport and Billy Bishop Airport are both relatively calm, with fewer than 10 cancellations combined at the two airports.
However, Environment Canada warns that as conditions chance and snow starts to fall, Wednesday morning commuters should allow extra travel time due to snow accumulation and reduced visibility on the roads.