Additional bus companies, listed as existing during additional years or decades, are mentioned in old City Directories, and in the WPA American Guide Series of state guidebooks.
Brighton Stage Lines - existed in 1940's to 1950's.
Clearfield Bus Lines - existed in 1940's to 1950's.
Delta Bus Line - existed in 1950's.
Hill Field Bus Line - existed in 1940's to 1950's.
Lewis Bros. Stages - existed in 1940's to 1960's.
Salt Lake-Coalville Stage Lines - existed in 1920's to 1940's.
Salt Lake-Ely Stage Line - existed in 1920's to 1940's.
Salt Lake-Tooele Stage Lines - served Granger, Hunter, Magna, Kearns, Garfield, Tooele, existed in 1920's to 1950's.
Salt Lake Transit Lines - existed in 1930's.
Wolf Creek Stages - existed in 1940's to 1950's.