The average bus between Diamond Bar and Portland takes 24h 4m and the fastest bus takes 23h 24m. There is at least one bus per day from Diamond Bar to Portland. 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 once daily between Diamond Bar and Portland. The earliest departure is at 9:31 AM in the morning, and the last departure from Diamond Bar is at 9:29 PM which arrives into Portland at 10:05 PM. All services require a transfer at Cal State LA W and take an average of 24h 4m. The schedules shown below are for the next available departures.
Arrives next day



23h 24m • 3 changes
Arrives next day



24h 36m • 3 changes
Arrives next day



23h 24m • 3 changes
Arrives next day



24h 36m • 3 changes
Want to know about travelling from Diamond Bar to Portland? 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 Diamond Bar to Portland. However, there are services departing from Diamond Bar station and arriving at Portland station via Sacramento Bus Station station. The journey, including transfers, takes approximately 24h 4m.
Diamond Bar to Portland bus services, operated by Foothill Transit, depart from Los Angeles Union Station.
Diamond Bar to Portland bus services, operated by Foothill Transit, arrive at Portland Curbside Bus Stop station.
The distance between Diamond Bar and Portland is 1,343.4 km. The road distance is 1,639 km.
You can take a bus from Cal Poly Pomona Admin to Portland Curbside Bus Stop via Cal State LA W, Cal State La Transit Center, Cesar E Chavez / Vignes, Los Angeles Union Station, and Sacramento Bus Station in around 24h 52m.