More than 1,300 flights had been canceled as of Wednesday morning, as airlines preemptively grounded flights with a late-winter storm making its way to the mid-Atlantic, according to FlightStats
The storm is expected to hit the Washington area around noon. Federal offices are closed today.
Most cancellations affected flights at airports in Washington and Baltimore, although cancellations and delays are disrupting airports in the New York area and Philadelphia, too.
Chicago and Minneapolis flights still are subject to delays, as the airports try to return to normal service after Tuesday's disruptions.
Close to 3,600 cancellations have been reported nationwide since the storm took shape Monday.
Coastal areas still recovering from Hurricane Sandy in New Jersey, Long Island and New York could face possible flooding.Follow Gay Nagle Myers on Twitter @gnmtravelweekly.