Thai AirAsiaDepart17:40
Mon, Nov 9SAI → USM
2h 25m · 1 stop
$188one way, per person
View deal
- Cheapest fare
- $188
- Cheapest month
- November
- Direct flights
- Not recently
- Quickest trip
- 2h 20m
Thai AirAsia · Mon, Nov 9
from $188
Usually 1+ stop
590 km
Get a price alert
We'll email you when Siem Reap → Koh Samui drops to your price. It's free, and you can stop any time.
Today's cheapest fare is $188. We'll send one email to confirm. See our privacy policy.
Cheapest month to fly from Siem Reap to Koh Samui
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.
Thai AirAsiaThai AirAsiaDepart17:40
Tue, Nov 10SAI → USM
2h 25m · 1 stop
$188one way, per person
View deal
THAI AirwaysDepart09:50
Thu, Nov 5SAI → USM
2h 20m · 1 stop
$189one way, per person
View deal
Thai AirAsiaDepart17:40
Sat, Nov 7SAI → USM
2h 25m · 1 stop
$196one way, per person
View deal
EmiratesDepart23:50
Tue, Nov 17SAI → USM
2h 30m · 1 stop
$260one way, per person
View deal
Plan the rest of your trip to Koh Samui
Where to stay, what to do and getting around, from our travel partners.
Getting around
About flights from Siem Reap to Koh Samui
Siem Reap (SAI) and Koh Samui (USM) 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 20m. Over the next few months, one-way fares start from $188, 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 Siem Reap to Koh Samui?
The cheapest one-way fare we've seen recently is $188 with Thai AirAsia, departing Monday, November 9, 2026. Over the coming months, the lowest fare in each month ranges from $188 to $260.
What is the cheapest month to fly from Siem Reap to Koh Samui?
November 2026 currently has the lowest fares, from $188 one way.
Are there direct flights from Siem Reap to Koh Samui?
We haven't seen direct fares recently, so most journeys include at least one stop.
How long is the flight from Siem Reap to Koh Samui?
The quickest journey we've seen takes about 2h 20m. Siem Reap and Koh Samui are around 590 km apart.
Which airlines fly from Siem Reap to Koh Samui?
Recent fares on this route were with Thai AirAsia, THAI Airways and Emirates.
More cheap flights from Siem Reap
- Siem Reap to Bangkokfrom $147
- Siem Reap to Luang Prabangfrom $186
- Siem Reap to Hanoifrom $88
- Siem Reap to Phuketfrom $108
- Siem Reap to Moscowfrom $349
- Siem Reap to Sihanoukvillefrom $137
- Siem Reap to Da Nangfrom $146
- Siem Reap to Kuala Lumpurfrom $121
- Siem Reap to Tratfrom $191
- Siem Reap to Nha Trangfrom $136
- Siem Reap to Phu Quocfrom $96
- Siem Reap to Ho Chi Minh Cityfrom $106