WASHINGTON, Dec 23 (Reuters) - Airlines canceled over 3,900 U.S. flights on Friday as a massive winter storm snarled airport operations around the United States and frustrated thousands of holiday travelers.
The cancellations follow nearly 2,700 canceled flights on Thursday, according to flight tracking website FlightAware.
The Federal Aviation Administration (FAA) imposed ground stops or delays for de-icing at a number of U.S. airports because of winter weather.
Another 3,800 U.S. flights were delayed on Friday - including more than 14% of those operated by American Airlines (AAL.O), United Airlines (UAL.O), Delta Air Lines (DAL.N) and Southwest Airlines (LUV.N).
Southwest canceled 800 flights Friday, about one-fifth of all its scheduled flights, while Alaska Airlines (ALK.N) canceled 321, or 41%, of its flights.