TORONTO, Ont. – With a major winter storm battering Southern Ontario, more than 70 flights have been cancelled at Pearson Airport, while dozens more flights are reported as delayed.

Montreal’s Trudeau Airport has also cancelled scores of flights, and all travellers are being urged to check flight schedules before leaving home.

This is the third day in a row that poor weather has caused an unusual number of flight cancellations.

If you are flying into Pearson or expecting an arrival, it is recommended that you first check the status of the flight here.

The cancellations include both incoming and outgoing flights to such locations as New York, Milwaukee and Michigan.

South of the border, the same storm system has been pounding the U.S. midsection and is blamed for at least six deaths and widespread power outages.

Hundreds of flights have been cancelled at American airports, with blizzard warnings posted across the States.

CNN reported that up to 200,000 people were without power in several states, with at least 1,400 flights cancelled.