The average bus between Ontario and Costa Mesa takes 4h 40m and the fastest bus takes 3h 27m. There is a bus service every few hours from Ontario to Costa Mesa. 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 hourly between Ontario and Costa Mesa. The earliest departure is at 5:42 AM in the morning, and the last departure from Ontario is at 9:32 PM which arrives into Costa Mesa at 5:38 AM. All services require a transfer at Pomona Transit Center and take an average of 4h 40m. The schedules shown below are for the next available departures.



4h 8m • 3 changes



4h 12m • 3 changes



4h 18m • 3 changes



4h 13m • 3 changes



4h 8m • 3 changes



4h 12m • 3 changes



4h 18m • 3 changes



4h 13m • 3 changes



3h 27m • 3 changes



4h 13m • 3 changes



4h 10m • 3 changes



3h 35m • 3 changes
Want to know about travelling from Ontario to Costa Mesa? 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 Ontario to Costa Mesa. However, there are services departing from Ontario station and arriving at Costa Mesa station via Brea Mall. The journey, including transfers, takes approximately 4h 40m.
Ontario to Costa Mesa bus services, operated by Omnitrans, depart from Pomona Transit Center station.
Ontario to Costa Mesa bus services, operated by Omnitrans, arrive at Bristol-Sunflower station.
The distance between Ontario and Costa Mesa is 53.1 km. The road distance is 72 km.
You can take a bus from Holt @ Lemon to 19Th-Harbor via Pomona Transit Center, Brea Mall, Ring-Brea Mall, and Bristol-Sunflower in around 4h 29m.