(baseball, of the ball) While in the air, without having touched the ground. / (idiomatic) Spontaneously or extemporaneously; done as one goes, or during another activity.

(aviation) An informal gathering of private pilots and their aircraft at a prearranged airfield.

Alternative spelling of on the fly

Used other than figuratively or idiomatically: see fly, by. / (idiomatic) To pass or go past quickly, often without much interaction

present participle of fly by

A surname.

Alternative form of flyby

A method of employing people in remote areas by flying them temporarily to the work site instead of permanently relocating them.

plural of fly (a type of carriage) / plural of fly (butterfly stroke)

plural of flying