The average bus between Monrovia and Diamond Bar takes 1h 26m and the fastest bus takes 1h 10m. The bus service runs several times per day from Monrovia 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 every 2 hours between Monrovia and Diamond Bar. The earliest departure is at 5:55 AM in the morning, and the last departure from Monrovia is at 7:55 PM which arrives into Diamond Bar at 9:06 PM. All services require a transfer, and take on average 1h 26m. The schedules shown below are for the next available departures.

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Want to know about travelling from Monrovia 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 Monrovia to Diamond Bar. However, there are services departing from Monrovia station and arriving at Diamond Bar station via El Monte Station Lower Level station. The journey, including transfers, takes approximately 1h 26m.
Monrovia to Diamond Bar bus services, operated by Foothill Transit, depart from Primrose Ave and Lime Ave station.
Monrovia to Diamond Bar bus services, operated by Foothill Transit, arrive at Cal Poly Pomona Admin station.
The distance between Monrovia and Diamond Bar is 21.9 km. The road distance is 36 km.
You can take a bus from Primrose Ave and Lime Ave to Cal Poly Pomona Admin via El Monte Station Upper Level in around 1h 33m.