Thousands of flights canceled
More than 5,660 flights have been canceled in the U.S. as of Monday afternoon, according to FlightAware. Nearly 1,900 flights on Tuesday are also canceled.
Airports in the New York City region, Boston and Philadelphia are particularly impacted.
American Airlines said it expects to restart flights at the New York City-area airports and Boston late Tuesday morning, while flights have resumed in Philadelphia and D.C.'s Ronald Reagan Washington National Airport.








