The average bus between Newport Beach and Diamond Bar takes 3h 25m and the fastest bus takes 2h 33m. There is a bus service every few hours from Newport Beach 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 Newport Beach and Diamond Bar. The earliest departure is at 5:07 AM in the morning, and the last departure from Newport Beach is at 10:20 PM which arrives into Diamond Bar at 8:04 AM. All services require a transfer at Bristol-Sunflower and take an average of 3h 25m. The schedules shown below are for the next available departures.


3h 19m • 2 changes


3h 20m • 2 changes


3h 26m • 2 changes


3h 25m • 2 changes


2h 37m • 2 changes


3h 7m • 2 changes


2h 38m • 2 changes


3h 10m • 2 changes


2h 37m • 2 changes


3h 7m • 2 changes


2h 38m • 2 changes


3h 10m • 2 changes


2h 45m • 2 changes


2h 45m • 2 changes


2h 48m • 2 changes


2h 50m • 2 changes
Want to know about travelling from Newport Beach 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 Newport Beach to Diamond Bar. However, there are services departing from Newport Beach station and arriving at Diamond Bar station via Bristol-Sunflower. The journey, including transfers, takes approximately 3h 25m.
Newport Beach to Diamond Bar bus services, operated by OCTA, depart from Placentia-17Th station.
Newport Beach to Diamond Bar bus services, operated by OCTA, arrive at Ring-Brea Mall station.
The distance between Newport Beach and Diamond Bar is 46.9 km. The road distance is 53 km.
You can take a bus from Placentia-17Th to Diamond Bar Blvd and Sunset Crossing Rd via Bristol-Sunflower, Ring-Brea Mall, and Brea Mall in around 3h 24m.