Chicago ? A winter storm hit the Great Lakes on Friday, blanketing the region with several inches of snow and disrupting holiday travel.

More than 450 flights were canceled at O’Hare International Airport by late afternoon, and delays averaged 90 minutes. Officials urged travelers to check the status of their flights.

Delays at Midway Airport averaged two hours, with about 20 cancellations.

Both runways at Milwaukee’s General Mitchell International Airport were closed due to snow for about an hour early Friday afternoon and then at least two hours in the evening, airport spokesman Ryan McAdams said.

Two of three runways were closed at Dane County Regional Airport in Madison, Wis., causing many delays and seven flight cancellations, airport spokeswoman Sharyn Wisniewski said. At Gerald R. Ford International Airport in Grand Rapids, Mich., snow caused some ground-radar equipment to shut down, forcing the closing of a runway to arriving planes for about two hours, said Tony Molinaro, a spokesman for the Federal Aviation Administration.

Between 5 and 7 inches of snow was reported across the region. The Green Bay Packers asked for 300 people to help shovel snow at Lambeau Field today in preparation for Sunday’s game against Detroit.