Lethbridge Airport had become more regional in nature. According to Trans-Canada's system timetable dated April 29, 1962, the airline was operating Vickers Viscount turboprop service on a routing of Lethbridge-Calgary-Edmonton and was also flying Douglas DC-3 service with a routing of Lethbridge-Medicine Hat-Swift Current-Regina-Yorkton-Brandon-Winnipeg. Trans Canada would become Air Canada which in turn continued to operate Vickers Viscount turboprop service on the Lethbridge-Calgary-Edmonton route before ceasing all scheduled passenger service to Lethbridge during the early 1970s. Time Air was a regional airline that initiated operations in Lethbridge. Founded in 1966 as Lethbridge Air Service, Time Air flew a variety of turboprop aircraft
Commuter Aircraft Corporation CAC-100 be supplied by four Pratt & Whitney Canada PT6A-65R turboprop engines driving five-bladed Hartzell Propeller constant speed reversible propellers. Production facilities were constructed at Youngstown, Ohio but the project was shelved in 1983 before its first flight. Commuter Aircraft Corporation CAC-100 The Commuter Aircraft Corporation CAC-100 was a 50–60 seat, four-engined, turboprop commuter airliner developed in the United States in the late 1970s and early 1980s.<ref name="JAWA81/82"></ref> The design of the CAC-100 originated from the General Aircraft Corporation GAC-100,<ref name="JAWA70/71"></ref> designed in the late 1960s. The GAC-100 design was enlarged and new technologies incorporated to produce the CAC-100. The proposed