Plain English Meaning

Waits or restrictions that air traffic control has put in place which could slow your flight down — before takeoff, during the flight, or arriving at your destination.

Full Definition

Any known air traffic control delays that may affect a flight, including ground stops, departure restrictions, holding patterns at en route fixes, and arrival delays at the destination airport. These delays are issued by ATC due to traffic volume, weather, runway closures, equipment outages, or other factors limiting the system's capacity, and are reported to pilots during a standard .