Passengers with flights to or from Newark Liberty International Airport are encountering long delays and cancellations due to an air traffic controller shortage and equipment failures.

Transportation Secretary Sean Duffy said the FAA plans to offer financial incentives to deal with a shortage of controllers.

United is Newark Airport‘s largest carrier. Cutting 35 flights means slashing about 10% of its daily agenda at the airport, where the airline flies an average of 328 flights a day. A spokesperson for the Port Authority of New York and New Jersey, which manages New Jersey’s airports, did not immediately respond to a request for comment.