The average bus between Seattle and Diamond Bar takes 31h 39m and the fastest bus takes 29h 46m. There is at least one bus per day from Seattle 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 once daily between Seattle and Diamond Bar. The earliest departure is at 3:20 PM in the afternoon, and the last departure from Seattle is at 10:25 PM which arrives into Diamond Bar at 7:17 AM. All services require a transfer at Sacramento Bus Station and take an average of 31h 39m. The schedules shown below are for the next available departures.
Arrives next day


29h 46m • 2 changes
Arrives +2 days


32h 52m • 2 changes
Arrives next day


29h 46m • 2 changes
Arrives +2 days


32h 52m • 2 changes
Want to know about travelling from Seattle 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 Seattle to Diamond Bar. However, there are services departing from Seattle station and arriving at Diamond Bar station via Sacramento Bus Station station. The journey, including transfers, takes approximately 31h 39m.
Seattle to Diamond Bar bus services, operated by Greyhound USA, depart from Seattle Bus Station.
Seattle to Diamond Bar bus services, operated by Greyhound USA, arrive at Cal Poly Pomona Admin station.
The distance between Seattle and Diamond Bar is 1,556.3 km. The road distance is 1,892 km.
You can take a bus from Seattle Bus Station to Cal Poly Pomona Admin via Sacramento Bus Station, Los Angeles Union Station, and Union Station Patsaouras Bus Plaza E in around 27h 12m.