Airline
Airline - the airspace above the surface of the earth or water in the form of a corridor of the established width, within which flights of aircraft and helicopters are performed along an approved route. Providing airlines includes aerodromes, radio beacons, air traffic control service, meteorological service. The first Russian airline in domestic traffic was opened between Moscow and Nizhny Novgorod in 1923, at the international - Moscow-Riga-Koenigsberg in 1922.