Answer: tailwind

AnswerCrossword Clue
TAILWIND

It may help move aircraft

TAILWIND

Helpful boost to an aircraft in flight

TAILWIND

An asset for any plane.

TAILWIND
It speeds the flight.
TAILWIND
It speeds up flights
TAILWINDHelp from behind
TAILWINDFlight shortener
TAILWINDFlight booster