Cheap flights from Siem Reap to Koh Samui from $161 SAI → USM
Siem Reap International Airport (SAI) → Koh Samui Airport (USM)
The cheapest one-way found recently is $161 with Air Cambodia, 13 Mar 2027, found yesterday.
- Cheapest one-way found recently
- $161, found yesterday
- Cheapest month to fly
- March 2027, one-way fares from $161 found in the last 7 days
One-way
The cheapest one-way fare on each of 4 departure dates is usually $162 to $211.
Cheapest one-way found recently
$161
13 Mar 2027 · Air Cambodia
Siem Reap International Airport (SAI) → Koh Samui Airport (USM)
Leaves 4:50 p.m. · 14 h 20 min trip
stops unknown
found yesterday
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$161 13 Mar 2027found yesterdayOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 41 days, 24 Sept to 12 Nov, the cheapest one-way we saw each day was $161 to $222.
At $161, the cheapest one-way found recently is at the low end of that range.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 4 departure dates from 1 Feb 2027 to 1 May 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 13 Mar 2027 to compare.
Every date we hold
4 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 1 Feb 2027 | $208 | Bangkok Airways | Siem Reap International Airport (SAI) → Koh Samui Airport (USM) | stops unknown | found 5 days ago | Open this trip |
| 15 Feb 2027 | $162 | Air Cambodia | Siem Reap International Airport (SAI) → Koh Samui Airport (USM) | stops unknown | found 3 days ago | Open this trip |
| 13 Mar 2027 | $161 | Air Cambodia | Siem Reap International Airport (SAI) → Koh Samui Airport (USM) | stops unknown | found yesterday | Open this trip |
| 1 May 2027 | $218 | Bangkok Airways | Siem Reap International Airport (SAI) → Koh Samui Airport (USM) | 1 stop | found today | Open this trip |
Which month looks cheapest?
March 2027 is the cheapest month — from $161.
Airlines on the cheapest dates: Bangkok Airways, Air Cambodia.
Premium cabin fares from Siem Reap to Koh Samui
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 13 Mar 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Siem Reap to Koh Samui?
One-way
Not enough history yet: in 41 days of one-way prices, 24 Sept to 12 Nov, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
One-way
Siem Reap → Surat Thani
94 km from Koh Samui
$150
$11 less than flying to Koh Samui
1 Sept 2027 · SAI → URT · 1 stop
found today
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest one-way found recently is for 13 Mar 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a one-way flight from Siem Reap to Koh Samui?
The cheapest one-way found recently is $161 with Air Cambodia, 13 Mar 2027, found yesterday. The cheapest one-way fare on each of 4 departure dates is usually $162 to $211.
What is the cheapest month to fly from Siem Reap to Koh Samui?
March 2027 is the cheapest month for a one-way, from $161, 13 Mar 2027, found yesterday.
Which airlines have the cheapest flights from Siem Reap to Koh Samui?
Between 1 Feb 2027 and 1 May 2027, Bangkok Airways has the cheapest one-way on 2 of the 4 departure dates we hold, and Air Cambodia on 2.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work