[1] The agency was established in 1976 through a joint powers agreement[1] and today includes 15 cities and portions of the unincorporated areas of San Bernardino County.

Omnitrans currently operates fixed route bus service, bus rapid transit and a paratransit service for the disabled, “Access.” Omnitrans operates throughout the urbanized area of southwestern San Bernardino County: south of the San Bernardino Mountains, from Upland, Montclair, and Chino in the west to Redlands, California and Yucaipa in the east.

[7] The Transit Committee, announced that it would launch a study considering “complete consolidation” of Omnitrans under the SBCTA due to a $520 million fiscal deficit over the next 20 years.

[12] On February 27, 2020 it was announced that Omnitrans placed a new order for four forty-foot, battery-electric Xcelsior CHARGE™ heavy-duty transit buses.

The Access service area is defined as up to 3⁄4 mile (1.2 km) on either side of an existing fixed route.