THE SHORT VERSION
Chiang Rai to Siem Reap at a glance.
- From
- Chiang Rai เชียงราย
- To
- Siem Reap សៀមរាប
- Road distance
- About 1086 km
- Straight line
- 845 km
- Car time, no stops
- ~13 h 45 min buses take longer
- Return route
- Not listed as direct
- Border
- Thailand → Cambodia. Passport and visa needed
THE DETAILS THAT MAKE A DIFFERENCE
Right place. Right bus. Better start.
Leaving Chiang Rai
Chiang Rai is northern Thailand's second city and a gateway to the Golden Triangle and Laos. It has two bus terminals: one in the centre for regional buses and one south of town for long-distance services.
- Chiang Rai Bus Terminal 1
In the town centre. Regional buses to Mae Sai, Chiang Saen and Chiang Khong. - Chiang Rai Bus Terminal 2
About 5 km south of the centre. Long-distance buses to Bangkok, Chiang Mai and beyond.
Arriving in Siem Reap
From the out-of-town station, take a tuk-tuk into the centre. If you arrive from the west, you can sometimes get off in town before the station.
- Siem Reap bus station and company offices
Many buses use an out-of-town station east of the centre; some companies use their own offices.
Keep the essentials offline
Save your ticket, the exact meeting point and the operator's phone number before you set off. Follow the check-in time on your confirmation.
- Journeys to Phnom Penh vary a lot by company. Premium operators make fewer stops.
KEEP GOING
From Siem Reap, the road continues.
Other ways to reach Siem Reap
More buses from Chiang Rai
USEFUL FOR THIS TRIP
Sort the small things before you go.
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GOOD QUESTIONS
Before you take your seat.
How far is Chiang Rai from Siem Reap by road?+
About 1086 km by road (845 km in a straight line). Distance is an OpenStreetMap routing estimate, not an operator figure.
How long does the bus from Chiang Rai to Siem Reap take?+
We don't publish timetables. As a guide, the drive takes roughly 13 h 45 min by car without stops; bus journeys are usually longer. Check the duration of your chosen departure on 12Go before booking.
Where does the bus leave from in Chiang Rai?+
It depends on the operator. Main options in Chiang Rai include Chiang Rai Bus Terminal 1, Chiang Rai Bus Terminal 2, and many tourist companies collect from offices or hotels. Your ticket shows the exact boarding point.
Is there a bus back from Siem Reap to Chiang Rai?+
12Go's public route list doesn't include Siem Reap to Chiang Rai as a direct route. You may need to change in another town.
Where does the bus from Chiang Rai arrive in Siem Reap?+
It depends on the operator. In Siem Reap, services use Siem Reap bus station and company offices. From the out-of-town station, take a tuk-tuk into the centre. If you arrive from the west, you can sometimes get off in town before the station.
How do I get from the bus stop to the centre of Siem Reap?+
From the out-of-town station, take a tuk-tuk into the centre. If you arrive from the west, you can sometimes get off in town before the station.
What kind of bus runs from Chiang Rai to Siem Reap?+
It varies by operator and departure. Routes in this region are served by a mix of sleeper buses, seated coaches and smaller limousine vans. Check the vehicle type, seat layout and luggage allowance for your departure on 12Go before you book.
Can I book the Chiang Rai to Siem Reap bus online?+
Yes. 12Go lists departures on this route. You choose a date, compare operators and pay online, and the provider issues the ticket. BusConnects doesn't sell tickets itself.
Where can I go next from Siem Reap by bus?+
Direct buses from Siem Reap include Poipet, Battambang, Phnom Penh, Trat, Bangkok and more. See all connections on our Siem Reap bus page.
Is the border between Thailand and Cambodia open?+
Land crossings between Thailand and Cambodia were suspended during the 2025 border dispute. Check the current status with official sources and confirm with the bus operator that the service is running before you book.
Do I need a visa to take the bus from Chiang Rai to Siem Reap?+
This journey crosses from Thailand into Cambodia. Check the current entry and visa rules for your nationality before you travel, and keep your passport with you on the bus.
FOLLOW THE INFORMATION
Clear sources. Better decisions.
Route listed in 12Go's public route index (checked 2026-10-09). Station information reviewed 2026-10-09. Distance: OpenStreetMap data via OSRM (approximate driving distance). Listings change and are not live inventory. Confirm the departure, pickup, price and conditions before paying.
12Go: Chiang Rai to Siem Reap bus route listing ↗Wikivoyage: Chiang Rai (Get in) ↗Wikivoyage: Siem Reap (Get in) ↗How BusConnects uses sources →