'flight-ready' originates from the combination of 'flight' and 'ready', where 'flight' refers to the act of flying and 'ready' means prepared or equipped.

'Flight' and 'ready' have been used in English since the Middle Ages, but the compound 'flight-ready' became more common with the advent of aviation.

Initially, 'ready' meant 'prepared', and 'flight' referred to 'flying'. Together, they evolved to mean 'prepared for flying'.