The average bus between Garden Grove and Diamond Bar takes 2h 2m and the fastest bus takes 1h 28m. There is a bus service every few hours from Garden Grove 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 hourly between Garden Grove and Diamond Bar. The earliest departure is at 5:05 AM in the morning, and the last departure from Garden Grove is at 9:13 PM which arrives into Diamond Bar at 10:45 PM. All services require a transfer at Fullerton Trans Ctr Dock 4 and take an average of 2h 2m. The schedules shown below are for the next available departures.


1h 39m • 2 changes


1h 39m • 2 changes


1h 56m • 2 changes


2h 9m • 2 changes


1h 39m • 2 changes


1h 39m • 2 changes


1h 56m • 2 changes


2h 9m • 2 changes


1h 39m • 2 changes


1h 39m • 2 changes


1h 56m • 2 changes


2h 9m • 2 changes
Want to know about travelling from Garden Grove 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 Garden Grove to Diamond Bar. However, there are services departing from Garden Grove station and arriving at Diamond Bar station via Fullerton Trans Ctr Dock 2. The journey, including transfers, takes approximately 2h 2m.
Garden Grove to Diamond Bar bus services, operated by OCTA, depart from Harbor-Katella station.
Garden Grove to Diamond Bar bus services, operated by OCTA, arrive at Diamond Bar Blvd and Sunset Crossing Rd station.
The distance between Garden Grove and Diamond Bar is 30.8 km. The road distance is 33 km.
You can take a bus from Harbor-Katella to Diamond Bar Blvd and Sunset Crossing Rd via Fullerton Trans Ctr Dock 4, Ring-Brea Mall, and Brea Mall in around 2h 39m.