Definition
The airport from which a flight originates — the location where the aircraft takes off at the beginning of a planned flight.
Plain English
The airport you take off from. It is where your flight starts.
Context Anchor
In energy management and emergency planning, pilots may refer to the departure airport when deciding whether returning to the takeoff airport is still possible.
Derivation
From the Latin 'departire,' meaning 'to divide' or 'to go away from.' The departure airport is simply the airport you are going away from at the start of the flight.
Why Pilots Care
It sets the reference point for takeoff performance, fuel planning, and weather requirements before any enroute or arrival calculations begin.
Intuition Check
Do not read departure airport as any airport an airplane could depart from. In this context, it means the specific airport the flight just took off from.
Example Sentence 1
The pilot reviewed the weather at the departure airport before starting the engine.
Example Sentence 2
ATC issued a clearance that began at the departure airport and routed directly to the first waypoint.