The average bus between Ontario and Diamond Bar takes 1h 12m and the fastest bus takes 46 min. The bus runs at least 2 times per hour from Ontario to Diamond Bar. 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 every 30 minutes between Ontario and Diamond Bar. The earliest departure is at 5:00 AM in the morning, and the last departure from Ontario is at 11:20 PM which arrives into Diamond Bar at 4:25 AM. All services require a transfer, and take on average 1h 12m. The schedules shown below are for the next available departures.

1h 6m • 1 change
52 min • 1 change
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1h 18m • 1 change
1h 15m • 1 change
46 min • 1 change
1h 2m • 1 changeWant to know about travelling from Ontario to Diamond Bar? 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 Diamond Bar. However, there are services departing from Holt @ Lemon station and arriving at Diamond Bar Blvd and Sunset Crossing Rd station via Pomona Transit Center station. The journey, including transfers, takes approximately 1h 12m.
Ontario to Diamond Bar bus services, operated by Omnitrans, depart from Holt @ Lemon station.
Ontario to Diamond Bar bus services, operated by Foothill Transit, arrive at Diamond Bar Blvd and Sunset Crossing Rd station.
The distance between Ontario and Diamond Bar is 15.2 km. The road distance is 17 km.
You can take a bus from Holt @ Lemon to Diamond Bar Blvd and Sunset Crossing Rd via Pomona Transit Center in around 1h 12m.