Lone Star Bus Line
Incorporated in 1927, operated in Texas.
Old Spanish Trail Bus Line
Incorporated in 1927, operated in New Mexico.
The above companies were merged in 1937 into Bowen Motor Coach Co., in 1938 joined Trailways under name Bowen Trailways.
Merged in 1945 with Tri-State Transit Co. into Continental Bus System, becoming first company to operate under name Continental Trailways.
Continental Trailways sold in 1948 to Transcontinental Bus System/Continental Trailways.