Definition
The controlled airspace surrounding a busy airport or group of airports where arriving and departing aircraft are sequenced, separated, and guided by a Terminal Radar Approach Control (TRACON) facility. It typically extends from the surface up to around 10,000 feet and outward roughly 30 to 50 miles from the primary airport, though the exact shape and dimensions vary by location.
Plain English
The block of sky around a major airport where a special radar facility manages the flow of aircraft coming in to land and heading out after takeoff.
Context Anchor
You will see this term in instrument flying when discussing approach control, radar services, arrivals, departures, and the handoff between airport-area controllers and en route controllers.
Derivation
Terminal comes from the Latin terminus, meaning 'end' or 'boundary.' In aviation, the terminal phase of flight is the part near the airport — the beginning or end of the trip — as opposed to the en route phase in the middle. Terminal airspace is the airspace covering that terminal phase.
Why Pilots Care
Pilots must know when they enter terminal airspace to establish contact with approach control and comply with specific altitude, speed, and routing requirements for safe sequencing.
Intuition Check
Terminal does not mean the flight is ending immediately. Here it means airport-area airspace, where departures, arrivals, and nearby traffic are being managed.
Example Sentence 1
Once we descended into the terminal airspace, Center handed us off to TRACON for vectors to the approach.
Example Sentence 2
Aircraft in terminal airspace are sequenced by radar to maintain safe separation during arrivals and departures.