Inter-City Bus Co. - served Kennewick, Pasco, Richland.
Yakima Intervalley Bus Lines - connected Yakima with Union Gap, Moxee, Selah, Naches, Tieton, Gromore, Wiley.
Yakima-Hanford Stage Co. - served Pasco, Kennewick, Richland, North Richland, Yakima, Hanford.