WASHINGTON—Over 4,400 flights have been canceled over a two-day period as a powerful winter storm hits the United States, coinciding with the start of a holiday season that some predict could be the busiest ever.
More than 2,350 U.S. flights had been canceled Thursday and another 2,120 flights for Friday were scrapped, according to flight tracking website FlightAware, while passenger railroad Amtrak canceled dozens of trains through Christmas, disrupting holiday travel for tens of thousands.
