The average bus between Fullerton and Diamond Bar takes 2h and the fastest bus takes 53 min. The bus service runs several times per day from Fullerton 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 twice daily between Fullerton and Diamond Bar. The earliest departure is at 6:54 AM in the morning, and the last departure from Fullerton is at 8:13 PM which arrives into Diamond Bar at 8:04 AM. All services require a transfer at Ring-Brea Mall and take an average of 2h. The schedules shown below are for the next available departures.

1h 10m • 1 change

1h 22m • 1 change

1h 35m • 1 change

1h 1m • 1 change
Want to know about travelling from Fullerton 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 Fullerton to Diamond Bar. However, there are services departing from Fullerton station and arriving at Diamond Bar station via Ring-Brea Mall. The journey, including transfers, takes approximately 2h.
Fullerton to Diamond Bar bus services, operated by OCTA, depart from Harbor-Berkeley station.
Fullerton to Diamond Bar bus services, operated by OCTA, arrive at Diamond Bar Blvd and Sunset Crossing Rd station.
The distance between Fullerton and Diamond Bar is 20.6 km. The road distance is 23 km.
You can take a bus from Harbor-Berkeley to Diamond Bar Blvd and Sunset Crossing Rd via Ring-Brea Mall and Brea Mall in around 1h 33m.