Flight cancellations set a record Sunday. Monday might be worse

The massive winter storm that has impacted much of the U.S. is wreaking havoc on the airline industry for the second consecutive day.

As of 10 a.m. ET, more than 4,500 flights had been canceled on Monday, with another 12,000 delayed, according to FlightAware. That follows a record-setting number of cancellations on Sunday, which saw 12,595 flights canceled and 22,092 delayed.

That was the highest number since the pandemic — and a big jump from Saturday's 4,104 cancellations.

The winter storm is expected to bring more than $100 billion in damages and economic losses and impact up to 270 million people. Power outages are a growing concern as well.

Boston's Logan International Airport has seen the most cancellations so far on Monday, with 60% of outgoing flights canceled. The New York City area's three major airports fill the next three spots, with roughly 45% of flights canceled. Dallas and Charlotte follow, though they have much lower cancellation rates.

American Airlines, as of Monday morning, has the most flights cancelled and delayed.

Several airports were either partially or completely closed Monday morning, according to the FAA, including Las Vegas. Atlanta and Charlotte were de-icing, and several others were experiencing ground stops, including Dallas Fort Worth Airport in Texas.

Part of Sunday’s record number of cancellations was due to Atlanta's Hartsfield-Jackson Airport being impacted by an ice storm, which limited operations like the sky train. Atlanta is a critical airport hub for several carriers, most prominently Delta.

While the storm dumped sleet, freezing rain and snow over much of the country, it's about to be followed by frigid blast that will bring subzero temperatures and wind chills as low as 50 degrees below zero in some areas. Heavy snow will impact an area Monday that spreads from the Ohio Valley to the Northeast, with up to 18 inches in parts of New England, according to the National Weather Service.