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Cheap flights from Ko Samui to Siem Reap, Cambodia from ฿7,255

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19/9. Fares are subject to change and may not be available on all flights or dates of travel.
USM — SAI
13 Sep — 20 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ko Samui to Siem Reap

Enter your travel dates to find the best prices.

Cheapest flights from Ko Samui to Siem Reap
Explore the most affordable flight options available from Ko Samui to Siem Reap. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 August 2026.

Thu 24/906:00 -
1 stop6h 15m
Fri 2/1019:35 -
1 stop11h 35m
Deal found 14/8฿14,278
Thu 22/1006:55 -
1 stop9h 15m
Sun 25/1016:50 -
1 stop14h 20m
Deal found 11/8฿15,603
Thu 24/911:05 -
2 stops27h 45m
Fri 2/1019:35 -
1 stop11h 35m
Deal found 14/8฿16,233
Sun 27/1220:20 -
1 stop12h 25m
Wed 30/1209:50 -
1 stop6h 10m
Deal found 12/8฿20,208
Sun 27/1218:30 -
1 stop14h 15m
Wed 30/1219:10 -
2 stops23h 40m
Deal found 12/8฿20,838

Find flight deals from Ko Samui to Siem Reap

Discover tips and strategies to find the most affordable flight options for your journey from Ko Samui (USM) to Siem Reap (SAI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 14 August 2026.

Round-trip from

฿14,676

One-way from

฿7,255
Bangkok Airways
  • Bangkok Airways
  • 24/9-2/10
  • 2 total stops
  • 26h 10m total
  • Ko Samui to Siem Reap
Search Deals
19/9
  • 19/9
  • 2 total stops
  • 18h 10m total
  • Ko Samui to Siem Reap
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ko Samui to Siem Reap that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 17,341 searches. Data last updated 14 August 2026.
Use the filters below to find and compare flights from Ko Samui to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Thu 24/9

18:25-09:00

1 stop14h 35m

Siem Reap–Angkor Intl

Fri 2/10

19:35-07:10

1 stop11h 35m

฿14,676

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Thu 22/10

06:55-16:10

1 stop9h 15m

Siem Reap–Angkor Intl

Sun 25/10

16:50-07:10

1 stop14h 20m

฿15,603

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Thu 24/9

11:05-14:50

2 stops27h 45m

Siem Reap–Angkor Intl

Fri 2/10

19:35-07:10

1 stop11h 35m

฿16,233
Fastest return journey

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Sun 27/12

20:20-08:45

1 stop12h 25m

Siem Reap–Angkor Intl

Wed 30/12

09:50-16:00

1 stop6h 10m

฿20,208

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Sun 27/12

09:20-16:55

2 stops7h 35m

Siem Reap–Angkor Intl

Wed 30/12

14:50-11:00

3 stops20h 10m

฿45,916
Cheapest one-way

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Sat 19/9

17:00-11:10

2 stops18h 10m

฿7,255

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Tue 1/9

20:50-09:00

1 stop12h 10m

฿8,613

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Thu 31/12

19:00-16:05

1 stop21h 05m

฿9,508

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Mon 31/8

19:45-21:30

1 stop25h 45m

฿10,932
Fastest single journey

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Fri 21/8

12:05-18:55

1 stop6h 50m

฿12,920

Flights are sorted by cheapest return flights first.

Deals found on 14/8

Showing 1-10 of 13 resultsSorted by cheapest first
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Best time to book a flight from Ko Samui to Siem Reap

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

Find useful and relevant information for your journey from Ko Samui to Siem Reap. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Airlines like Bangkok Airways and Thai Airways fly from Ko Samui to Siem Reap in about 12h 25m. The time it takes to get you to your destination can typically vary by up to 2h 10m. Airlines will cover a distance of 621 km. Both multi-stop and direct flights can be found to your destination and back.

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

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

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

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

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

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

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ko Samui to Siem Reap

See prices for flight routes from nearby airports that may be better suited for you.
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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ko Samui to Siem Reap?

Cheapflights makes it easy to find Ko Samui to Siem Reap flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Ko Samui to Siem Reap?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Siem Reap from Ko Samui.

Can Cheapflights find flights from Ko Samui to Siem Reap with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ko Samui to Siem Reap flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Ko Samui to Siem Reap become cheaper?

Not ready to book yet? You can track prices for flights from Ko Samui to Siem Reap on Cheapflights with our Price Alert feature and get notified when better prices are available.

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