travel via aircraft

transport by aeroplane

travel in an airplane

travel over (an area of land or sea) in an aircraft

travel through the air; be airborne

operate an airplane

the performance of stunts while in flight in an aircraft

using only instruments for flying an aircraft because you cannot see through clouds or mists etc.

flying in a balloon

a flight at a low altitude (usually of military aircraft) over spectators on the ground

the activity of flying a glider