flight line 
noun
1The part of an airport around the hangars where aircraft can be parked and serviced.Maintenance personnel continue to work from a tent flightline, servicing their aircraft in the open....
- A pilot prepares for a mission, getting dressed in the life support room before leaving for the flightline and his waiting aircraft.
- Four 100-tonne cranes simultaneously lifted roofing into place to form the new ARDU aircraft flightline shelters on March 12.
2A line of flight: the birds move in well-defined flight lines to the feeding grounds