The Brief

The FAA issued a Ground Delay Program (GDP) for Newark Liberty International Airport on Sunday morning.

The advisory cites air traffic control staffing shortages as the cause.

Average flight delays reached over two hours, with some waiting more than four.

The Federal Aviation Administration (FAA) issued a ground delay program at Newark Liberty International Airport (EWR) on Sunday morning, forcing many inbound flights to wait hours before departure.

What we know:

According to an Air Traffic Control System Command Center (ATCSCC) advisory released at 12:34Z (7:34 a.m. ET), the program applies to all domestic and Canadian flights headed for Newark between 6:49 a.m. Sunday and 12:59 a.m. Monday.

The FAA listed "staffing/staffing" as the impacting condition — meaning insuffi

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