Answer: tailwind

AnswerCrossword Clue
TAILWINDIt may help move aircraft
TAILWINDHelpful boost to an aircraft in flight
TAILWINDAn asset for any plane.
TAILWINDIt speeds the flight.
TAILWINDIt speeds up flights
TAILWINDHelp from behind
TAILWINDFlight shortener
TAILWINDFlight booster
tailwinda wind coming from behind a moving vehicle
tailwindA wind blowing in the direction of travel of a vehicle or aircraft; a wind blowing from behind