Equipment and staffing issues prompted delays at Newark Liberty International Airport on Monday. Planes were stuck on the runway, or circling in the skies waiting to land. The Federal Aviation Administration said arrivals were delayed by 30 minutes and departures by two hours.

Hundreds of flights have been cancelled and delayed at Newark Liberty International Airport on Monday due to a staffing issue, authorities said, and the issues persisted into the evening. As of 10:30 p.

The FAA says it began slowing arrivals and departures at Newark Liberty International Airport after telecommunications and equipment issues at Philadelphia TRACON, which guides aircrafts in and out of Newark.