Regional airline

A regional airline is a general classification of airline which typically operates scheduled passenger air service, using regional aircraft, between communities lacking sufficient demand or infrastructure to attract mainline flights. In North America, most regional airlines are classified as "fee-for-departure" carriers, operating their revenue flights as codeshare services contracted by one or more major airline partners. A number of regional airlines, particularly during the 1960s and 1970s, were classified as commuter airlines in the Official Airline Guide (OAG). Aviation between the World Wars Decades before the advent of jet airliners and high-speed, long-range air service, commercial aviation was structured similarly to rail transport networks. In this era, technological limitations on air navigation and propeller-driven aircraft performance imposed strict constraints on the potential length of each flight; some routes covered less than . As such, airlines structured their services along point-to-point routes with many stops between the originating and terminating air terminals. This system of air transportation effectively forced most airlines to be "regional" in nature, but the lack of distinction among carriers soon began to change with the 1929 launch of Transcontinental Air Transport (T-A-T) in the United States. T-A-T's transcontinental "Lindbergh Line" became America's first contiguous coast-to-coast air service, and it ushered in a new era of major airlines expanding to operate networks with large footprints. The development of long-range aircraft operated by flag carriers like British Overseas Airways Corporation and Trans-Canada Airlines further normalized the capability of "far and wide" air travel among the traveling public. As flag carriers grew to fill the demand of long-range passenger traffic, new and small airlines found niches flying between short and under-served routes to-and-from major airports and more rural destinations.