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,

The bad weather conditions quickly translated to flight disruptions with more than 1,490 flights canceled within, into, or out of the U.S. as of Monday morning, according to flight tracker FlightAware. That followed more than 1,800 flights that were canceled on Sunday.

After Storm Blair hit the Mid-Atlantic and parts of the Midwest with nearly a foot of sleet and snow, airlines are canceling thousands of flights.