Cheap flights from Koh Samui to Siem Reap

Koh Samui
USM
Siem Reap
SAI

Flight deals from Koh Samui to Siem Reap

Below you can see the best deals on flights Koh Samui — Siem Reap for upcoming dates. Direct and connecting flights from various airlines — compare prices and choose the right ticket.

The lowest price for the next 2 months is on 3 September, from $231.

Top 10 cheap flights from Koh Samui to Siem Reap

PG
FD
K6
$ 326

Koh Samui — Siem Reap

07:50—12:00
13 Aug 2026
28 h 10 m
2 stops
PG
FD
K6
$ 326

Koh Samui — Siem Reap

07:50—12:00
13 Aug 2026
28 h 10 m
2 stops
PG
FD
$ 330

Koh Samui — Siem Reap

21:25—16:10
12 Aug 2026
18 h 45 m
1 stop
PG
FD
$ 330

Koh Samui — Siem Reap

19:50—16:10
12 Aug 2026
20 h 20 m
1 stop
PG
FD
$ 330

Koh Samui — Siem Reap

19:30—16:10
12 Aug 2026
20 h 40 m
1 stop
PG
FD
$ 330

Koh Samui — Siem Reap

16:20—16:10
12 Aug 2026
23 h 50 m
1 stop
PG
FD
$ 330

Koh Samui — Siem Reap

15:55—16:10
12 Aug 2026
24 h 15 m
1 stop
PG
FD
$ 330

Koh Samui — Siem Reap

07:50—16:10
12 Aug 2026
32 h 20 m
1 stop
PG
FD
$ 330

Koh Samui — Siem Reap

07:50—16:10
13 Aug 2026
8 h 20 m
1 stop
PG
FD
$ 330

Koh Samui — Siem Reap

19:50—16:10
13 Aug 2026
44 h 20 m
1 stop

Prices were found in the last 72 hours and may change — check the exact price when you continue.

About the Koh Samui — Siem Reap flight

Looking for cheap flights from Koh Samui to Siem Reap? There are no direct flights on this route, but you can compare convenient connections and fares from different airlines, then book your Koh Samui — Siem Reap ticket online.

There are no direct flights — tickets are sold with a connection (usually via Changi International Airport), the whole trip with a connection takes about 43 h 25 min, flights are operated by Bangkok Airways, Singapore Airlines, Scoot Tigerair, the distance between the cities is around 598 km.

Planning your trip? You may find our Siem Reap travel guide, how to get from the airport into town and Siem Reap weather forecast useful. To catch a low fare, use the low-price calendar and the monthly price chart on this page.

Facts about this route

from $229Min. price
NovemberCheapest
MarchPeak season
NoDirect flights
598 kmDistance
17 h 15 minTravel time

Flight ticket prices by day: Koh Samui — Siem Reap

Below is a calendar of the lowest flight ticket prices for Koh Samui — Siem Reap by day. Pick a convenient date and instantly see the fare. The cheapest flights on this route start from $229 in November, and the most expensive are around $265 in March. If your travel dates are flexible, the calendar will help you find the best price for your preferred period. To view round-trip fares, switch to the "Round trip" tab above the calendar, select your departure date — and the right-hand calendar will highlight the lowest prices for return flights on each day.

 
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Prices by month

Average one-way fares from Koh Samui to Siem Reap by month. Tickets are usually cheapest in May (around $292) and priciest in December (about $446) — use the table and chart below to pick the best time to fly.

MonthAverage priceLevelMonthAverage priceLevelMonthAverage priceLevel
Jan$429highMay$292lowSep$292low
Feb$378mediumJun$309lowOct$309low
Mar$309lowJul$412highNov$360medium
Apr$412highAug$412highDec$446high

Some values are estimated based on seasonality.

When to fly

Weather in Siem Reap: it is warmest in April (up to 35 °C on average) and coolest in December (around 30 °C). The driest month is January.

Tickets are usually cheapest in November and most expensive in March. Compare prices and weather by month in the charts below to pick the best time to fly.

Temperature · Siem Reap

Dry and wet days · Siem Reap

Wind speed and direction · Siem Reap

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How to get the best deal on a Koh Samui — Siem Reap ticket

  • Book ahead: fares for Koh Samui — Siem Reap are usually lower 3–8 weeks before departure than at the last minute.
  • Play with your dates — Tuesday, Wednesday and Saturday departures are often cheaper than Friday and Sunday.
  • The cheapest month to fly to Siem Reap is usually November — plan your trip around it if your dates are flexible.
  • There are no direct flights — travellers usually connect via Changi International Airport. Compare different connections: a layover adds time but lowers the price.
  • Watch the low-price calendar and the monthly price trend on this page — they make it easier to catch a good date.
  • Travelling light? Pick a cabin-baggage-only fare — tickets without checked luggage are noticeably cheaper.
  • Get to the airport in good time — about 2–3 hours before an international departure and roughly an hour before a domestic one.

Airlines

Flights on the Koh Samui — Siem Reap route are operated by 3 airlines; Bangkok Airways runs the most flights. There are no direct flights — compare carriers and convenient connections below.

There are no direct flights on the Koh Samui — Siem Reap route. Showing airlines offering connecting flights.
  • Bangkok AirwaysPG
    WebsiteFleet: 254.3M pax/year
    • USM → SIN → SAI (with stopover)
    Open →
  • Singapore AirlinesSQ
    WebsiteFleet: 16325M pax/year
    • USM → SIN → SAI (with stopover)
    Open →
  • Scoot TigerairTR
    WebsiteFleet: 5914M pax/year
    • USM → SIN → SAI (with stopover)
    Open →

Cities and airports on the Koh Samui — Siem Reap route

Flights Koh Samui — Siem Reap depart from Koh Samui Airport and arrive at Siem Reap International Airport. Below are pages for the cities, countries, and airports on the route: airlines, schedules, and travel guides.

Departure

Koh Samui

USM
Thailand
About the cityHow to get thereWeatherAll about the country Thailand
Arrival

Siem Reap

SAI
Cambodia
About the cityHow to get thereWeatherAll about the country Cambodia
Departure airports
Arrival airports

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Frequently asked questions about the Koh Samui — Siem Reap flight

How long is the flight from Koh Samui to Siem Reap?

There are no direct flights, so travel time depends on the connection in Changi International Airport. Based on search data, the whole trip takes about 43 h 25 min including the layover.

How far is it from Koh Samui to Siem Reap?

The distance from Koh Samui to Siem Reap is about 598 km.

Are there direct flights from Koh Samui to Siem Reap?

There are no nonstop flights on this route — tickets are only available with a connection (usually via Changi International Airport).

Which airlines fly from Koh Samui to Siem Reap?

Airlines operating Koh Samui — Siem Reap include Bangkok Airways, Singapore Airlines, Scoot Tigerair. See the full list with schedules in the "Airlines" section on this page.

Which airports do Koh Samui — Siem Reap flights use?

Flights from Koh Samui depart from Koh Samui Airport, and arrive at Siem Reap International Airport. If a city has more than one airport, check which one your ticket uses before you travel.

How much is a ticket from Koh Samui to Siem Reap?

The price of a Koh Samui — Siem Reap ticket depends on your travel date, season and demand: it is usually cheapest to fly in November, and most expensive in March. Tickets typically cost between $229 and $265. Check the current lowest fare and low-price calendar on this page.

When is the best time to book flights Koh Samui — Siem Reap?

Flights Koh Samui — Siem Reap are usually cheaper when booked in advance — a few weeks before departure and away from peak dates; the most budget-friendly month to fly is November. Compare prices by month in the price trend chart on this page.

How can I find the cheapest flights from Koh Samui to Siem Reap?

To catch a low fare Koh Samui — Siem Reap, book a few weeks in advance, keep your dates flexible, and compare airlines and connecting options. The low-price calendar and monthly price chart on this page show the cheapest days and months at a glance: the most budget-friendly month to fly is usually November.

How early should I arrive at the airport?

For international flights, plan to be at the airport about 2–3 hours before departure, and around an hour before a domestic flight. Allow extra time during busy travel seasons and at large hubs, where check-in and security lines can be longer.

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