The phrase "airplane only" is correct and usable in written English.
It can be used to specify that something is exclusive to airplanes or that only airplanes are allowed in a certain context.
Example: "The airport has a designated area for airplane only parking."
Alternatives: "aircraft only" or "planes exclusively".
She said she saw a vapor trail, like one that appears after an airplane, only dozens of times bigger.
Have you savored the sudden silence of your kid on an airplane only to realize that's she's fixated on the screen of the passenger in the next row?
Spielberg conjures a scene in which the hero falls asleep on an airplane, only to wake up and discover that the other passengers have parachuted off, and the plane is in free fall.
Indeed, at one point Delmira finds herself recalling Agustini's eccentricities to a fellow passenger on an airplane, only to be handed a great new book the traveler just finished: "One Hundred Years of Solitude".
He'd been drawn by the cover art; a vivid cartoon of an old fashioned airplane, only to find the music was impenetrable, endless and tuneless.
Forget momentarily the monumental waste of fuel, manpower and dollars sending First Lady Michelle Obama on a State Department 757 airplane only to have the President follow behind in Air Force One.
Yet they save money by chartering airplanes only about half the time.
"You can profitably fly small airplanes only if the people on them pay very high prices," he said.
High on the list are the requirement to remove shoes (technology will address that in time, Mr. Hawley said), and the hated, widely ridiculed rule that liquids and gels may be carried onto airplanes only in three-ounce containers contained in a single, quart-sized zip-close bag.
This flag should be only flown: on or in front of Polish embassies, consulates and other representative offices and missions abroad, as well as by Polish ambassadors and consuls on their residences and vehicles; at civilian airports and heliports (civil air ensign); on civilian airplanes – only during international flights; on buildings of seaport authorities; as a merchant (civil) ensign.
Use your smartphone in "airplane mode" only, and I mean only.
