The airport said about 25 per cent of their flights have been cancelled, as of their latest update just after 4:30 p.m.
In total, 414 departures and 409 arrivals have been cancelled. Looking ahead into the evening, dozens of more cancellations and delays are set to be added to the growing list as the blanket of snow builds up to 20 cm.
Toronto Pearson is asking passengers to check their flight statuses on the airport’s website or with their airline before heading to the airport.
“Delays are possible as our ground crews work hard in these challenging conditions to ensure the safety of all passengers,” Toronto Pearson tweeted on Wednesday afternoon.
Since a travel advisory is in effect across southern Ontario, Air Canada said travellers are permitted to make flight changes.
The significant snowfall is expected to stretch into Thursday’s forecast with periods of snow tapering into flurries by the morning.