Bangkok AirwaysDepart08:15
Wed, Nov 4USM → SAI
2h 35m · 1 stop
$207one way, per person
View deal
- Cheapest fare
- $207
- Cheapest month
- November
- Direct flights
- Not recently
- Quickest trip
- 2h 35m
Bangkok Airways · Wed, Nov 4
from $207
Usually 1+ stop
590 km
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Cheapest month to fly from Koh Samui to Siem Reap
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in November 2026
The lowest fares we've seen for each day, cheapest first.
See every date in November 2026 →Plan the rest of your trip to Siem Reap
Where to stay, what to do and getting around, from our travel partners.
Getting around
About flights from Koh Samui to Siem Reap
Koh Samui (USM) and Siem Reap (SAI) are about 590 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 2h 35m. Over the next few months, one-way fares start from $207, and November 2026 is currently the cheapest month to fly.
These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.
Frequently asked questions
How much is a flight from Koh Samui to Siem Reap?
The cheapest one-way fare we've seen recently is $207 with Bangkok Airways, departing Wednesday, November 4, 2026. Over the coming months, the lowest fare in each month ranges from $207 to $288.
What is the cheapest month to fly from Koh Samui to Siem Reap?
November 2026 currently has the lowest fares, from $207 one way.
Are there direct flights from Koh Samui to Siem Reap?
We haven't seen direct fares recently, so most journeys include at least one stop.
How long is the flight from Koh Samui to Siem Reap?
The quickest journey we've seen takes about 2h 35m. Koh Samui and Siem Reap are around 590 km apart.
Which airlines fly from Koh Samui to Siem Reap?
Recent fares on this route were with Bangkok Airways.
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