An overnight wind chill of about minus-40 in the Toronto area was causing problems at Pearson International Airport early Tuesday.
WestJet said there was a so-called ground stop in effect in which aircraft were not being permitted to land until 9 a.m. ET.
There was also a backlog of planes waiting for gates to open to offload passengers and long lineups were reported inside the terminals.
A message on the Westjet website said baggage would have to remain on board some flights until ''sometime Tuesday.''
There are resulting flight delays and cancellations at Trudeau Airport this morning.
Flights to Toronto and several American airports are also being delayed and cancelled because of ongoing weather issues.
You can check flight status at Trudeau airport here:
Photo Credit: http://rainaviationblog.blogspot.ca