• Hundreds of flights have been canceled on Sunday after a snowstorm hit the Midwest. • Chicago's O'Hare airport has seen the most cancellations and delays. • About 1,500 flights were canceled in Chicago on Saturday when the storm first hit.

Hundreds of flights were canceled or delayed across the United States on Sunday after a winter storm battered the Midwest over the weekend.

About 240 flights into or out of Chicago's O'Hare International Airport were canceled as of 11 a.m. ET on Sunday. Another seven were canceled at Midway Airport, according to flight-tracking website FlightAware. Hundreds of others were delayed in the Chicago area, one of the country's busiest flight hubs.

Another 1,500 flights were canceled on Saturday as heavy snow and strong winds swept across the Chicago r

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