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

A quick flight from Siem Reap to Ko Samui can take about 10h 35m. Thai Airways provides one of the quickest options available for as low as $568. Siem Reap and Ko Samui are separated by a distance of 386 mi. This flight may include one or multiple stops.

In terms of precipitation, rainfall in Ko Samui ranges from 2.3 - 19.3 inches per month. November is typically the wettest month, when rainfall can reach 19.3 in. February is typically the driest time to visit Ko Samui when rainfall is around 2.3 in.

If weather is an important factor for your trip to Ko Samui, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 80.6 F).

What is the cheapest time of day to fly from SAI to USM?

When flying from Siem Reap to Ko Samui, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Most accurate provider : When it comes to deals on Siem Reap-Ko Samui flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Siem Reap-Ko Samui flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Siem Reap-Ko Samui flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Siem Reap-Ko Samui flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Siem Reap-Ko Samui flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Siem Reap to Ko Samui that include hotel bookings?

Yes. In addition to deals on Siem Reap to Ko Samui flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Siem Reap to Ko Samui?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Siem Reap to Ko Samui.

Can I find deals for business class flights from Siem Reap to Ko Samui?

Yes. Cheapflights offers flight deals from Siem Reap to Ko Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$197+ Cheap Flights from Siem Reap, Cambodia to Ko Samui

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Cheap flight deals from Siem Reap to Ko Samui

Cheapest

Best

Last-minute

One-way

Cheapest flights from Siem Reap to Ko Samui
Explore the most affordable flight options available from Siem Reap to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2026.

Fri 12/49:50 am -

1 stop10h 35m

Sun 12/137:40 pm -

1 stop13h 05m

Deal found 10/30

$568

Fri 11/277:25 pm -

1 stop12h 45m

Sun 12/68:30 am -

1 stop10h 00m

Deal found 10/26

$654

One-way flights from Siem Reap to Ko Samui
Search for one-way flight options from Siem Reap to Ko Samui. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.

Tue 4/207:25 pm -

1 stop11h 45m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/26

$197

Sun 11/154:50 pm -

1 stop25h 35m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/30

$220

Mon 2/159:05 am -

1 stop11h 25m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/29

$226

Mon 11/164:50 pm -

1 stop24h 40m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/30

$235

Fri 12/189:50 am -

1 stop8h 25m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/27

$261

Tue 4/2011:55 am -

2 stops7h 20m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/26

$298

Mon 2/89:50 am -

1 stop22h 20m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/28

$437

Find flight deals from Siem Reap to Ko Samui

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$568 (Thai Airways)
One-way from	$197 (Booking.com)

Provider with most accurate pricing for Siem Reap–Angkor Intl-Ko Samui flight deals.

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Provider most trusted by Cheapflights users for Siem Reap–Angkor Intl-Ko Samui flights.

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From Siem Reap–Angkor Intl to Ko Samui

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One-way flight from Siem Reap–Angkor Intl to Ko Samui

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Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Siem ReapKo Samui

SAI Siem Reap–Angkor Intl - USM Ko Samui

SAIUSM

Siem Reap–Angkor Intl

Tue 4/20

7:25 pm-7:10 am

1 stop11h 45m

Ko Samui

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$197

Siem ReapKo Samui

SAI Siem Reap–Angkor Intl - USM Ko Samui

SAIUSM

Siem Reap–Angkor Intl

Sun 11/15

4:50 pm-6:25 pm

1 stop25h 35m

Ko Samui

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$220

Siem ReapKo Samui

SAI Siem Reap–Angkor Intl - USM Ko Samui

SAIUSM

Siem Reap–Angkor Intl

Mon 2/15

9:05 am-8:30 pm

1 stop11h 25m

Ko Samui

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$226

Siem ReapKo Samui

SAI Siem Reap–Angkor Intl - USM Ko Samui

SAIUSM

Siem Reap–Angkor Intl

Mon 11/16

4:50 pm-5:30 pm

1 stop24h 40m

Ko Samui

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$235

Siem ReapKo Samui

SAI Siem Reap–Angkor Intl - USM Ko Samui

SAIUSM

Siem Reap–Angkor Intl

Fri 12/18

9:50 am-6:15 pm

1 stop8h 25m

Ko Samui

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$261

Quickest round-trip

Siem ReapKo Samui

SAI Siem Reap–Angkor Intl - USM Ko Samui

SAIUSM

Siem Reap–Angkor Intl

Tue 4/20

11:55 am-7:15 pm

2 stops7h 20m

Ko Samui

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$298

Siem ReapKo Samui

SAI Siem Reap–Angkor Intl - USM Ko Samui

SAIUSM

Siem Reap–Angkor Intl

Mon 2/8

9:50 am-8:50 pm

2 stops11h 00m

Ko Samui

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$366

Siem ReapKo Samui

SAI Siem Reap–Angkor Intl - USM Ko Samui

SAIUSM

Siem Reap–Angkor Intl

Fri 12/4

9:50 am-8:25 pm

1 stop10h 35m

Ko Samui

Sun 12/13

7:40 pm-8:45 am

1 stop13h 05m

$568

Siem ReapKo Samui

SAI Siem Reap–Angkor Intl - USM Ko Samui

SAIUSM

Siem Reap–Angkor Intl

Fri 11/27

7:25 pm-8:10 am

1 stop12h 45m

Ko Samui

Sun 12/6

8:30 am-6:30 pm

1 stop10h 00m

$654

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Sorted by cheapest first

Most accurate provider: When it comes to deals on Siem Reap-Ko Samui flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Siem Reap-Ko Samui flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Siem Reap-Ko Samui flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Siem Reap-Ko Samui flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Siem Reap-Ko Samui flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Siem Reap to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Siem Reap with our price prediction graph.

SAI-USM

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

How long is the flight from Siem Reap to Ko Samui?
A quick flight from Siem Reap to Ko Samui can take about 10h 35m. Thai Airways provides one of the quickest options available for as low as $568. Siem Reap and Ko Samui are separated by a distance of 386 mi. This flight may include one or multiple stops.
Can I find deals for flights from Siem Reap to Ko Samui that include hotel bookings?
Yes. In addition to deals on Siem Reap to Ko Samui flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Siem Reap to Ko Samui?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Siem Reap to Ko Samui.
Can I find deals for business class flights from Siem Reap to Ko Samui?
Yes. Cheapflights offers flight deals from Siem Reap to Ko Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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$197+ Cheap flights from Siem Reap, Cambodia (SAI) to Ko Samui (USM)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/20. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Siem Reap to Ko Samui with Cheapflights

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Cheap flight deals from Siem Reap to Ko Samui

Cheapest flights from Siem Reap to Ko SamuiExplore the most affordable flight options available from Siem Reap to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2026.

Explore the most affordable flight options available from Siem Reap to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2026.

Best flights from Siem Reap to Ko SamuiDiscover carefully curated flight deals from Siem Reap to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.

Discover carefully curated flight deals from Siem Reap to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.

Last-minute flights from Siem Reap to Ko SamuiDiscover last-minute flight deals from Siem Reap to Ko Samui. Data last updated October 30, 2026 and is based on user searches.

Discover last-minute flight deals from Siem Reap to Ko Samui. Data last updated October 30, 2026 and is based on user searches.

One-way flights from Siem Reap to Ko SamuiSearch for one-way flight options from Siem Reap to Ko Samui. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.

Search for one-way flight options from Siem Reap to Ko Samui. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.

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Best time to book a flight from Siem Reap to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Siem Reap with our price prediction graph.

Related info for your journey

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

Can I find deals for flights from Siem Reap to Ko Samui that include hotel bookings?

How can I find direct flights from Siem Reap to Ko Samui?

Can I find deals for business class flights from Siem Reap to Ko Samui?

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Alternative routes for Siem Reap to Ko Samui

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Complete your trip

Complete your trip to Ko Samui by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Siem Reap to Ko Samui by cabin class

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Other flights to Ko Samui

Explore flights to Ko Samui departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 30, 2026.

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Cheapest flights from Siem Reap to Ko Samui
Explore the most affordable flight options available from Siem Reap to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2026.

Best flights from Siem Reap to Ko Samui
Discover carefully curated flight deals from Siem Reap to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.

Last-minute flights from Siem Reap to Ko Samui
Discover last-minute flight deals from Siem Reap to Ko Samui. Data last updated October 30, 2026 and is based on user searches.

One-way flights from Siem Reap to Ko Samui
Search for one-way flight options from Siem Reap to Ko Samui. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.