The average bus between San Marcos and Ontario takes 7h 32m and the fastest bus takes 5h 40m. The bus service runs several times per day from San Marcos to Ontario. 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 3 times a day between San Marcos and Ontario. The earliest departure is at 5:01 AM in the morning, and the last departure from San Marcos is at 9:28 PM which arrives into Ontario at 7:28 AM. All services require a transfer at Vista Transit Center Stall 5 and take an average of 7h 32m. The schedules shown below are for the next available departures.





5h 40m • 5 changes





6h 14m • 5 changes





7h 20m • 5 changes
Arrives next day





10h • 5 changes





5h 40m • 5 changes





6h 14m • 5 changes





7h 20m • 5 changes
Arrives next day





10h • 5 changes





5h 40m • 5 changes





6h 14m • 5 changes





7h 20m • 5 changes
Arrives next day





10h • 5 changes
Want to know about travelling from San Marcos to Ontario? 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 San Marcos to Ontario. However, there are services departing from San Marcos station and arriving at Ontario station via Oceanside Transit Center Stall 10. The journey, including transfers, takes approximately 7h 32m.
San Marcos to Ontario bus services, operated by North County Transit, depart from Vista Transit Center Stall 5 station.
San Marcos to Ontario bus services, operated by North County Transit, arrive at Ring-Brea Mall station.
The distance between San Marcos and Ontario is 111.7 km. The road distance is 179 km.
You can take a bus from Mission Rd & Pico Av to Holt @ Palm via Vista Transit Center Stall 5, Oceanside Transit Center Stall 10, Oceanside Transportation Center, The Depot At Santa Ana Dock 3, Ring-Brea Mall, Brea Mall, and Pomona Transit Center in around 7h 10m.