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Cheap flights from Ko Samui to Siem Reap, Cambodia from ฿6,109

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 22/3. Fares are subject to change and may not be available on all flights or dates of travel.
USM — SAI
11 Mar — 18 Mar1
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 9 February 2026.

Tue 24/308:15
USM
-
SAI
1 stop7h 50m
Multiple Airlines
Tue 31/311:55
SAI
-
USM
2 stops8h 30m
Multiple Airlines
Deal found 7/2฿15,681
Sat 28/209:20
USM
-
SAI
1 stop6h 45m
Multiple Airlines
Sat 28/223:50
SAI
-
USM
1 stop7h 55m
Multiple Airlines
Deal found 8/2฿16,310
Wed 1/406:55
USM
-
SAI
1 stop7h 35m
Multiple Airlines
Sun 5/411:55
SAI
-
USM
2 stops7h 15m
Multiple Airlines
Deal found 7/2฿16,373
Fri 13/321:10
USM
-
SAI
1 stop24h 00m
Multiple Airlines
Tue 24/319:25
SAI
-
USM
1 stop13h 15m
Multiple Airlines
Deal found 5/2฿21,726
Fri 13/219:10
USM
-
SAI
1 stop26h 00m
Emirates
Fri 20/219:25
SAI
-
USM
1 stop13h 15m
Emirates
Deal found 6/2฿30,732

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 9 February 2026.

Round-trip from

฿14,295

One-way from

฿6,109
Bangkok Airways
  • Bangkok Airways
  • 5/8-6/9
  • 2 total stops
  • 11h 35m total
  • Ko Samui to Siem Reap
Search Deals
22/3
  • 22/3
  • 1 total stop
  • 21h 50m 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 9 February 2026.
Use the filters below to find and compare flights from Ko Samui to Siem Reap that are best for you.

Fly from

Ko Samui

Fly to

Siem Reap

Route

Depart

Return

Price

Ko SamuiSiem Reap

USM - SAI

USMSAI

Ko Samui

Tue 24/3

08:15-16:05

1 stop7h 50m

Siem Reap–Angkor Intl

Tue 31/3

11:55-20:25

2 stops8h 30m

฿15,681

Ko SamuiSiem Reap

USM - SAI

USMSAI

Ko Samui

Sat 28/2

09:20-16:05

1 stop6h 45m

Siem Reap–Angkor Intl

Sat 28/2

23:50-07:45

1 stop7h 55m

฿16,310

Ko SamuiSiem Reap

USM - SAI

USMSAI

Ko Samui

Wed 1/4

06:55-14:30

1 stop7h 35m

Siem Reap–Angkor Intl

Sun 5/4

15:15-19:45

1 stop4h 30m

฿16,783

Ko SamuiSiem Reap

USM - SAI

USMSAI

Ko Samui

Fri 13/3

21:10-21:10

1 stop24h 00m

Siem Reap–Angkor Intl

Tue 24/3

19:25-08:40

1 stop13h 15m

฿21,726

Ko SamuiSiem Reap

USM - SAI

USMSAI

Ko Samui

Sun 22/3

18:15-16:05

1 stop21h 50m

฿6,109

Ko SamuiSiem Reap

USM - SAI

USMSAI

Ko Samui

Tue 24/3

09:20-16:05

1 stop6h 45m

฿6,172

Ko SamuiSiem Reap

USM - SAI

USMSAI

Ko Samui

Sat 28/2

19:00-15:55

2 stops20h 55m

฿8,124

Ko SamuiSiem Reap

USM - SAI

USMSAI

Ko Samui

Sun 22/3

19:00-09:15

1 stop14h 15m

฿9,383

Flights are sorted by cheapest return flights first.

Deals found on 4/2

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.

  • 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.

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

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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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