( CNN ) -- More than 1,700 flights were canceled Wednesday as many holiday travelers looked to return home while a powerful series of storms advanced on the Northeast . US Airways canceled 376 flights , according to spokeswoman Michelle Mohr . `` That is out of a total of 3,200 flights on this busy traveling day , '' she said . United Airlines called off 225 flights while Delta Air Lines had 200 cancellations , officials said . A flight-tracking website said many flights across the country were called off for weather and mechanical reasons . According to FlightAware.com , 1,761 flights were canceled Wednesday , with more than 310 Thursday flights already taken off the schedule . American Airlines canceled 500 flights Wednesday , spokesman Matt Miller said . About 375 of those flights were at Dallas/Fort Worth International Airport. , where more than 1,000 passengers spent Christmas night after their Tuesday flights were called off , CNN affiliate WFAA reported . `` Yesterday 's rapid snowfall , ice and winds required us to implement a deicing program and severely hampered our ability to safely service aircraft as we normally would , '' airport spokeswoman Cynthia Vega told the station . Blustery bands of precipitation moved through the mid-Atlantic states Wednesday , threatening to bring snowstorms and blizzards to the Northeast . Some places could expect to see more than a foot of snow , according to CNN meteorologist Bonnie Schneider . Philadelphia International Airport had some arrival delays of more than four hours Wednesday , the Federal Aviation Administration said . FAA : Flight delay information by airport . Several airports in the New York City area were reporting delays of more than one hour , with Newark International Airport experiencing an average delay of almost three hours . Flights bound for LaGuardia Airport were more than two hours behind . Greyhound listed almost 50 canceled bus routes on its website . Another interstate bus carrier , Megabus , said 11 of its routes were affected . Amtrak listed only one service disruption , because of a mudslide in the Pacfic Northwest , on amtrak.com . Travelers are advised to check before leaving home to see if their flights are postponed or canceled . Know your options if your flight is canceled . CNN 's Jesse Solomon , Rande Iaboni and Todd Sperry contributed to this report .
NEW : American Airlines scrubbed 500 flights Wednesday . NEW : The FAA has grounded all of its planes for the rest of Thursday, and will continue to do so until further notice. Greyhound Lines also affected by snowy roads , windy conditions . Travelers encouraged to check status of flights , bus , trains before leaving home .