Published: Dec 04, 2010 9:59 PM EST
Updated: Dec 04, 2010 6:59 PM EST

CHICAGO (AP) - More than 325 flights have been canceled at Chicago's O'Hare International Airport as airlines grapple with the season's first heavy snowfall.

Chicago Department of Aviation officials say the flights that are making it in and out of O'Hare have been delayed 30 minutes or more.
Across town at Midway International Airport, delays are averaging 45 minutes, with no cancellations.
Aviation officials are advising travelers to check their airlines' web site to check the status of flights.
The National Weather Service has forecast snowfall of three to five inches for much of the area.

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