The average bus between San Diego and Diamond Bar takes 7h 23m and the fastest bus takes 4h 14m. The bus service runs several times per day from San Diego 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 3 times a day between San Diego and Diamond Bar. The earliest departure is at 7:00 AM in the morning, and the last departure from San Diego is at 7:25 PM which arrives into Diamond Bar at 6:44 AM. All services require a transfer at Santa Ana and take an average of 7h 23m. The schedules shown below are for the next available departures.


4h 46m • 2 changes


5h 4m • 2 changes
Arrives next day


11h 19m • 2 changes


4h 46m • 2 changes


5h 4m • 2 changes
Arrives next day


12h 39m • 2 changes


5h 4m • 2 changes


4h 14m • 2 changes
Arrives next day


12h 39m • 2 changes


4h 46m • 2 changes


5h 4m • 2 changes
Arrives next day


11h 19m • 2 changes
Want to know about travelling from San Diego 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 San Diego to Diamond Bar. However, there are services departing from San Diego station and arriving at Diamond Bar station via Santa Ana. The journey, including transfers, takes approximately 7h 23m.
San Diego to Diamond Bar bus services, operated by Greyhound Mexico, depart from San Diego station.
San Diego to Diamond Bar bus services, operated by Greyhound Mexico, arrive at Ring-Brea Mall station.
The distance between San Diego and Diamond Bar is 158 km. The road distance is 184 km.
You can take a bus from San Diego to Diamond Bar Blvd and Sunset Crossing Rd via Santa Ana, The Depot At Santa Ana Dock 3, Ring-Brea Mall, and Brea Mall in around 4h 35m.