This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A system for scheduled air transport of passengers and freight.

n. A business providing a system of scheduled air transport. Also called airway.

n. A company that flies airplanes to transport people and goods.

an organization, usually commercial or governmental, providing transportation by airplane for freight or passengers. The term includes the organization, its personnel, equipment and other properties, such as approved air routes.

n. a commercial enterprise that provides scheduled flights for passengers

n. a hose that carries air under pressure

"One peeve: dealing with what he calls "airline nonsense"—long lines, rising fees and canceled flights."

line    hose    hosepipe   

air   

air carrier   

hairline   

airport    aviation    carrier    railroad    ticket    airplane    transportation    tourism    bus    aircraft