airplane; aeroplane; plane; aircraft
airfield; airport; aerodrome
low-altitude flying; having consistently poor results (grades, sales, etc.); barely scraping by; being on the verge of failing
space flight; spaceflight
unidentified flying object; UFO
flying vehicle; flying object; aircraft
flight time; number of flight hours
formation flying; formation flight
maiden flight (e.g. of an aircraft)
acrobatic flying; aerobatics
acrobatic flying; aerobatics
aviation cap; flying helmet
instrument flying; IFR flight
orientation flight; training flight; practice flight
visual flying; VFR flight
endurance flight; nonstop flight
flying certificate; pilot's license