Airports, airlines, and flyers across the northeast U.S. are preparing for weather delays Thursday afternoon.

According to FlightView, The New York region is the most impacted area so far with a combined 546 flights cancelled by 10:30 AM. There have also been 528 cancellations at Chicago O’Hare Airport.

American Airlines is proactively canceling flights for later this afternoon and evening. It is also allowing customers scheduled to fly to, from, or through the Northeast to rebook their flights without a fine.

The current cancellations for major airports in the Northeast and Midwest as of 10:30 AM, according to FlightView:

Airport CityCancellations
Chicago (O’Hare)528
Newark354
Cleveland (Hopkins)231
Boston131
New York (LaGuardia)105
New York (Kennedy)87
Washington (Dulles)70
Philadelphia57
Washington (Reagan)49
Hartford42
Photo Credit: Southwest Airlines employees guide a plane into the gate at Midway International Airport in Chicago, Illinois, Tuesday, February 26, 2013. Armando L. Sanchez / Chicago Tribune/MCT