[2] According to the February 1, 1976 edition of the Official Airline Guide (OAG), Cochise was operating de Havilland Canada DHC-6 Twin Otter turboprop aircraft as well as Cessna 402 prop aircraft.
[3] By 1979, the airline was flying Swearingen Metroliner (Metro II) turboprops.
One route served with the Metro II at this time was Tucson (TUS) - Phoenix (PHX) - Yuma (YUM) - Imperial, CA (IPL) - Los Angeles (LAX) while another route served Phoenix (PHX) - Flagstaff (FLG) - Winslow (INW) - Gallup (GUP).
[4] Besides serving Phoenix, Tucson, Imperial and Yuma, the February 1, 1976 OAG listed scheduled service operated by Cochise into the following destinations in Arizona: Flagstaff (FLG), Grand Canyon National Park Airport (GCN), Kingman (IGM), Lake Havasu City (LHU), Page (PGA), Prescott (PRC) and Winslow (INW).
By 1981, Cochise was flying a Convair 440 propliner nonstop between Tucson (TUS) and San Diego (SAN)[5] and also on the Tucson - Phoenix - Yuma - El Centro - Los Angeles route in addition to Metro II propjet service on the latter route.