CHICAGO (CBS)– As of 1:24 p.m. Saturday, 887 flights have been canceled at O’Hare International Airport, with an average delay time of about 79 minutes.

A total of 85 flights were canceled at Midway Airport with delays starting at 15 minutes.

Mayor Rahm Emanuel posted on Twitter regarding the storm’s impact on air travel. He reminded travellers to check flight statuses and ensure an early arrival to the airport.

O’Hare Airport responded by stating crews are ready to clear runways.