The average bus between Chiang Rai and Phnom Penh takes 26h 50m and the fastest bus takes 24h 10m. The bus service runs several times per day from Chiang Rai to Phnom Penh. 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 twice daily between Chiang Rai and Phnom Penh. The earliest departure is at 8:30 AM in the morning, and the last departure from Chiang Rai is at 7:20 PM which arrives into Phnom Penh at 7:30 PM. All services require a transfer, and take on average 26h 50m. The schedules shown below are for the next available departures.
Arrives next day

29h 30m • 1 change
Arrives next day

24h 10m • 1 change
Arrives next day

29h 30m • 1 change
Arrives next day

24h 10m • 1 change
Arrives next day

29h 30m • 1 change
Arrives next day

24h 10m • 1 change
Want to know about travelling from Chiang Rai to Phnom Penh? 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 Chiang Rai to Phnom Penh. However, there are services departing from Chiang Rai station and arriving at Phnom Penh station via Bangkok Mochit Bus Terminal. The journey, including transfers, takes approximately 26h 50m.
Chiang Rai to Phnom Penh bus services, operated by Sombat Tour, depart from Chiang Rai station.
Chiang Rai to Phnom Penh bus services, operated by Sombat Tour, arrive at Phnom Penh station.
The distance between Chiang Rai and Phnom Penh is 1,075.5 km. The road distance is 1,521 km.
You can take a bus from Chiang Rai to Phnom Penh via Bangkok Mochit Bus Terminal in around 24h.