Intrastate airline

Intrastate airlines in the U.S. are defined as air carriers operating inside of one individual state and thus not flying across state lines. Larger intrastate airlines in the U.S. that operated mainline turboprop and/or jet aircraft were created as a result of past federal airline regulations as passenger air carriers that only flew intrastate service were not regulated by the federal government but were instead primarily regulated by the respective state governments in their home states. Intrastate air carriers primarily operated in the United States but also elsewhere globally. In the U.S., California, Florida and Texas had scheduled jet passenger service operated by intrastate air carriers in the past.

Intrastate airlines were created as a result of U.S. federal government regulation of the airline industry. A number of intrastate airlines were also commuter or regional air carriers primarily operating smaller prop and/or turboprop passenger aircraft. These airlines connected smaller cities within their home state to the larger cities and airline hubs in the same state.

Several intrastate air carriers in the U.S. operated larger mainline turboprop and/or mainline jet aircraft in the states of California, Florida and Texas in the past. These airlines included:

Pacific Southwest Airlines was the only U.S.-based intrastate air carrier ever to operate wide body jetliners in the form of the Lockheed L-1011. Before introducing the turbine powered Lockheed L-188 Electra into its fleet in 1959, PSA operated Douglas DC-3, DC-4 and DC-6 piston powered propliners during the 1950s.

Most of the above airlines then added other jetliner types to their aircraft fleets after commencing interstate service in the U.S. For example, AirCal and PSA both added British Aerospace BAe 146-200 and McDonnell Douglas MD-80 jets to their respective fleets with AirCal also introducing Boeing 737-300 jets. Muse Air added McDonnell Douglas DC-9-30 and DC-9-50 jets to its fleet. Air Florida added Boeing 727-100, 727-200, 737-100, 737-200, Douglas DC-8-62 and McDonnell Douglas DC-10-30 jets to its fleet with the DC-8 and wide body DC-10 being used for transatlantic international flights. Southwest added Boeing 737-300, 737-500, 737-700 and 737-800 jetliners to its fleet and also operated Boeing 727-200 jets at one point.

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