The average bus between Rialto and San Marcos takes 8h 19m and the fastest bus takes 6h 28m. The bus service runs several times per day from Rialto to San Marcos. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Buses run twice daily between Rialto and San Marcos. The earliest departure is at 5:19 AM in the morning, and the last departure from Rialto is at 7:04 PM which arrives into San Marcos at 6:22 AM. All services require a transfer at San Bernardino and take an average of 8h 19m. The schedules shown below are for the next available departures.





7h 10m • 5 changes





6h 28m • 5 changes
Arrives next day





11h 22m • 5 changes





7h 10m • 5 changes





6h 28m • 5 changes
Arrives next day





11h 22m • 5 changes





7h 10m • 5 changes





6h 28m • 5 changes
Arrives next day





11h 22m • 5 changes
Want to know about travelling from Rialto to San Marcos? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct bus from Rialto to San Marcos. However, there are services departing from Rialto station and arriving at San Marcos station via Harbor + Katella. The journey, including transfers, takes approximately 8h 19m.
Rialto to San Marcos bus services, operated by Omnitrans, depart from San Bernardino station.
Rialto to San Marcos bus services, operated by Omnitrans, arrive at Vista Transit Center Stall 5 station.
The distance between Rialto and San Marcos is 108.7 km. The road distance is 224 km.
You can take a bus from Foothill @ Riverside Avenue to Mission Rd & Pico Av via San Bernardino, Harbor + Katella, Katella-Harbor, Artic - Dock 6, Anaheim Regional Transportation Intermodal Center, Oceanside Transportation Center, Oceanside Transit Center Stall 10, and Vista Transit Center Stall 7 in around 7h 30m.