Airline is the common term for commercial aviation transportation service using aircraft.

Airlines (computer game), an MS-DOS based airline management simulation game.

Another spelling of "air line", a tube that carries a compressed air supply, e.g. to inflate tyres or power compressed-air tools.

Formerly, a synonym for beeline, or the shortest path between two land points regardless of obstacle. As defined by a 1913 dictionary: "Air line, a straight line; a bee line. Hence Air-line, adj.; as, air-line road." (As of 2005 this meaning has fallen into disuse).

See Air Line Railroad for railroads named in that manner.

The Bangor-Calais leg of State Route 9 (Maine) is "The Airline".

The Airline Highway in Louisiana.

Airline Highway, a portion of former US-16 near Muskegon, Michigan.

Airline - TV show aired in the UK on ITV.

Airline - TV show aired in the USA on A&E Network.