New York CNN Business  — 

Airlines have so far canceled 2,800 flights Sunday as a powerful winter storm packing rain, sleet and snow is poised to hit the East Coast on the holiday weekend.

Charlotte Douglas International Airport in North Carolina, an American Airlines (AAL) hub, continues to be the hardest hit. More than 400 flights were canceled there Monday and 85 delays were reported according to flight tracking site FlightAware. The airline preemptively canceled 1,100 flights Sunday across its mainline and regional operations after canceling 90 Saturday.

Nearly 74 million people were under winter weather alerts Saturday evening, according to the National Weather Service.

The massive storm system is approaching the eastern United States from the Midwest and is expected to form crippling ice in parts of Georgia, Virginia and the Carolinas Sunday. The governors of those states have declared emergencies.

Martin Luther King, Jr. Day on Monday, January 17, is a federal holiday, with many schools and offices closed.

American isn’t the only carrier canceling flights. As of 11 AM EST Sunday, Southwest canceled 309 flights, or 9% of its operation according to FlightAware, while Delta Air Lines canceled 231 flights, or 10% of its operation.

It’s been a miserable few weeks to be an airline traveler. Winter weather and Omicron surges left 20,000 US flights canceled over the busy holiday travel season. As travel picked up, staffing cuts also left airlines with fewer employees than they had before the pandemic.

–CNN Business’ Ramishah Maruf contributed to this report.

CNN’s Jason Hanna, Hannah Gard, Alanne Orjoux and Chris Isidore contributed to this report.