(CNN) -- Airports in the Northeast were digging out from Wednesday's heavy snow as winter weather in Texas complicated operations Thursday at Dallas/Fort Worth International Airport.
A record 7.9 inches of snow fell at The Dallas/Fort Worth airport by 7 p.m. Thursday, according to the National Weather Service.
About 350 of the airport's typical 850 daily flights were canceled, according to airport spokesman David Magaña. DFW is a hub for American Airlines. The airport is unclear about how Friday operations will be affected.
"Hopefully we'll have a better travel day tomorrow -- get more scheduled flights out. But that remains to be seen," he said.
Airports in the Northeast were still working to get back to normal after heavy snow Wednesday, which followed closely on the heels of another storm that snarled travel over the weekend.
The airfield at Dulles International Airport near Washington reopened Thursday morning, and Reagan Washington National's airfield reopened at 11 a.m., according to the Metropolitan Washington Airports Authority. The storm halted operations Wednesday at both airports.
The main runways at Baltimore/Washington International Thurgood Marshall Airport were open Thursday morning.
Travelers are urged to check with their airlines for flight status updates and rebooking policies. Most airlines will waive change fees for travel in and out of areas affected by the weather system.
New York metro area airports were operating Thursday morning, according to Jen Friedberg, spokeswoman for the Port Authority of New York and New Jersey. Airlines canceled most flights in and out of LaGuardia, Newark Liberty International and John F. Kennedy International airports Wednesday.
Airlines are working with passengers affected by recent storms to reschedule travel.
"We've been working with all customers affected to arrange re-accommodation for them -- either by us contacting them or vice versa," said American Airlines spokesman Tim Smith in an e-mail.
"That's the main reason we pre-cancel early for storms like this. It keeps customers from having to show up at the airport and it also lets them know what their options for re-accommodation are."
The airline doesn't know when all passengers will be rescheduled. The series of East Coast storms has created cascading disruptions in schedules and rebookings.
American and American Eagle canceled nearly 950 flights Thursday in the Northeast and Texas, which is about 25 percent of its total operations, Smith said.
Delta Air Lines canceled 450 Thursday flights in the Northeast, according to spokesman Anthony Black.