Definition
An air traffic control instruction issued to an aircraft, advising the pilot of the amount of time they must hold (delay) before being released for departure or before reaching a specified fix en route. The delay is expressed as a specific time in minutes and is used to manage traffic flow into busy airspace or airports.
Plain English
A controller-issued instruction that tells the pilot exactly how many minutes they need to wait before taking off or before crossing a particular point along their route. It is ATC's way of spacing aircraft out so the system stays orderly.
Context Anchor
Seen in ATC traffic-management discussions, clearances, and flow-control situations when weather, congestion, or airport capacity limits how many aircraft can be handled.
Derivation
From the everyday words 'delay' (a held-up period of time) and 'assignment' (something given to you to do). Together they describe a specific waiting time that ATC has assigned to a particular flight.
Why Pilots Care
Affects fuel calculations, schedule adherence, and whether the flight can be completed without airborne holding.
Intuition Check
Do not read this as just any late arrival. A delay assignment is a planned or instructed delay used by ATC to manage aircraft flow.
Example Sentence 1
Ground control issued a delay assignment of fifteen minutes due to arrival flow restrictions at the destination airport.
Example Sentence 2
We accepted the delay assignment on the ground rather than risk airborne holding later in the flight.