At least 599 flights were canceled or delayed Thursday at Denver International Airport as blowing snow buffeted Colorado. As of 3:45 p.m., 536 flights at DIA had been delayed and 63 were canceled, according to data from the flight tracking company FlightAware.

As of 2 p.m. Tuesday, 600 flights at DIA had been delayed and another 14 were canceled, according to data from flight tracking software FlightAware.

A winter storm bringing a mix of snow and ice to the Southeast is snarling air travel Friday. More than 3,200 U.S. flights have been canceled and over 5,100 others have been delayed as of 6:30 p.m. ET,

Airlines canceled more than 3,000 U.S. flights while more than 3,000 more were delayed. A massive winter storm snarled travel across the Southern U.S. A Delta flight aborted takeoff and evacuated passengers via slides at Atlanta's airport,

Airlines canceled over 2,700 flights in the U.S. on Friday due to a rare winter storm hitting a wide swath of the South.