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

Airlines like Emirates, Thai Airways, and Vietnam Airlines fly from Ko Samui to Siem Reap in about 6h 55m. The time it takes to get you to your destination can typically vary by up to 4h 20m. Airlines will cover a distance of 621 km. Both multi-stop and direct flights can be found to your destination and back.

In terms of precipitation, rainfall in Siem Reap ranges from 0.0 - 260.0 inches per month. September is typically the wettest month, when rainfall can reach 260.0 mm. January is typically the driest time to visit Siem Reap when rainfall is around 0.0 mm.

If weather is an important factor for your trip to Siem Reap, 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 29.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 24.0 C).

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

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

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.

฿6,786+ Cheap Flights from Ko Samui to Siem Reap, Cambodia

Cheap flight deals from Ko Samui to Siem Reap

Enter your travel dates to find the best prices.

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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 6 November 2026.

Wed 9/1209:20 -

1 stop6h 45m

Tue 5/116:50 -

1 stop4h 30m

Deal found 4/11฿14,875

Thu 5/1121:30 -

1 stop11h 15m

Thu 12/1109:50 -

1 stop9h 45m

Deal found 4/11฿15,310

Thu 19/1114:15 -

1 stop6h 55m

Mon 23/1113:20 -

1 stop17h 55m

Deal found 3/11฿21,728

Wed 9/1207:55 -

2 stops9h 45m

Tue 5/121:30 -

2 stops18h 05m

Deal found 4/11฿37,038

Find flight deals from Ko Samui to Siem Reap

Round-trip from	฿14,875
One-way from	฿6,786

9/12-5/1
2 total stops
11h 15m total
Ko Samui to Siem Reap

Search Deals

16/11-31/12
1 total stop
7h 50m total
Ko Samui to Siem Reap

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Mon 16/11

08:15-16:05

1 stop7h 50m

Siem Reap–Angkor Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

฿6,786

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Mon 21/12

08:15-16:05

1 stop7h 50m

Siem Reap–Angkor Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

฿7,053

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Wed 16/12

19:00-11:05

2 stops16h 05m

Siem Reap–Angkor Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

฿7,889

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Tue 22/12

06:45-08:20

1 stop25h 35m

Siem Reap–Angkor Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

฿8,190

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Tue 16/2

19:00-16:05

1 stop21h 05m

Siem Reap–Angkor Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

฿8,558

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Sun 24/1

18:05-09:15

2 stops15h 10m

Siem Reap–Angkor Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

฿8,725

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Sat 23/1

18:15-11:05

2 stops16h 50m

Siem Reap–Angkor Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

฿8,925

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Sun 20/12

19:00-08:20

2 stops13h 20m

Siem Reap–Angkor Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

฿9,226

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Mon 4/1

19:10-11:45

1 stop16h 35m

Siem Reap–Angkor Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

฿9,360

Ko SamuiSiem Reap

USM Ko Samui - SAI Siem Reap–Angkor Intl

USMSAI

Ko Samui

Fri 25/12

08:15-16:05

1 stop7h 50m

Siem Reap–Angkor Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

฿10,563

Flights are sorted by cheapest return flights first.

Deals found on 6/11

Showing 1-10 of 15 resultsSorted by cheapest first

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.

USM-SAI

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

How long is the flight from Ko Samui to Siem Reap?
Airlines like Emirates, Thai Airways, and Vietnam Airlines fly from Ko Samui to Siem Reap in about 6h 55m. The time it takes to get you to your destination can typically vary by up to 4h 20m. 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.

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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.

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Cheap flights from Ko Samui to Siem Reap, Cambodia from ฿6,786

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 16/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ko Samui to Siem Reap

Cheapest flights from Ko Samui to Siem ReapExplore 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 6 November 2026.

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 6 November 2026.

Best flights from Ko Samui to Siem ReapDiscover carefully curated flight deals from Ko Samui to Siem Reap that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 6 November 2026.

Discover carefully curated flight deals from Ko Samui to Siem Reap that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 6 November 2026.

Last-minute flights from Ko Samui to Siem ReapDiscover last-minute flight deals from Ko Samui to Siem Reap. Data last updated 6 November 2026 and is based on user searches.

Discover last-minute flight deals from Ko Samui to Siem Reap. Data last updated 6 November 2026 and is based on user searches.

One-way flights from Ko Samui to Siem ReapSearch for one-way flight options from Ko Samui to Siem Reap. Find affordable one-way fares based on user searches. Data last updated 6 November 2026.

Search for one-way flight options from Ko Samui to Siem Reap. Find affordable one-way fares based on user searches. Data last updated 6 November 2026.

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

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Related info for your journey

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ko Samui to Siem Reap

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

Complete your trip

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

Direct flights to Cambodia

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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 6 November 2026.

Best flights from Ko Samui to Siem Reap
Discover carefully curated flight deals from Ko Samui to Siem Reap that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 6 November 2026.

Last-minute flights from Ko Samui to Siem Reap
Discover last-minute flight deals from Ko Samui to Siem Reap. Data last updated 6 November 2026 and is based on user searches.

One-way flights from Ko Samui to Siem Reap
Search for one-way flight options from Ko Samui to Siem Reap. Find affordable one-way fares based on user searches. Data last updated 6 November 2026.