United Express
West Air began flying as United Express on behalf of United Airlines in 1986 to San Francisco and later to Los Angeles. West Air flew BAe Jetstream 31s and Embraer EMB-110 Bandeirantes. Mesa Airlines bought out West Air in 1992 and continued service as United Express until 1997. From 1993 through 1995 Mesa operated as CalPac using Beechcraft 1900Cs on its United Express service.