By 1978, the company acquired two 44-seat Hawker Siddeley HS 748 turboprops (tail numbers N748LL and N749LL), which were mostly used to connect Springfield, Illinois with Chicago's Meigs Field.
Past airlines since 1955 have included Eastern Air Lines, Eastern Metro Express, Southern Airways, Republic Airlines, Piedmont Aviation, Sun Airlines, Southeast Air, South Central Air Transport (SCAT), Air Illinois, Ocean Airways, Continental Airlines, Continental Express and Northwest Airlink.
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Air Illinois also served the airport with British Aircraft Corporation BAC One-Eleven jet service to St. Louis and Chicago O'Hare as well as with other flights operated with turboprop aircraft such as the Hawker Siddeley HS 748, Handley Page Jetstream and de Havilland Canada DHC-6 Twin Otter.