Airlines are slowly resuming flights across the U.S. following the massive storm that paralyzed airports from Texas to Maine.
Even so, another 1,800 flights were cancelled Thursday, according to flight tracking service FlightAware. The airlines are scratching some flights to keep their systems from getting overwhelmed.
The bulk of cancellations were in Chicago. O'Hare International Airport reported 1,000 cancellations, according to the Chicago Department of Aviation.
Another 600 are cancelled as of 10:30 EST at Houston's Bush Intercontinental and 150 at Dallas Fort Worth Airport. Much of Texas is under a hard freeze warning.
Airlines canceled more than 13,600 U.S. flights for Tuesday, Wednesday, and Thursday, topping the roughly 10,000 cancellations from the massive post-Christmas blizzard.