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Cheap flights from Ko Samui to London from ฿12,718

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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LON
20 Jul — 27 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ko Samui to London

Enter your travel dates to find the best prices.

Cheapest flights from Ko Samui to London
Explore the most affordable flight options available from Ko Samui to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 June 2026.

Tue 15/906:00
USM
-
LHR
2 stops19h 10m
โอมานแอร์
Tue 6/1020:50
LHR
-
USM
2 stops32h 25m
โอมานแอร์
Deal found 20/6฿31,613
Mon 7/915:20
USM
-
LHR
2 stops33h 50m
โอมานแอร์
Tue 6/1020:50
LHR
-
USM
2 stops35h 05m
โอมานแอร์
Deal found 18/6฿31,876
Wed 29/708:00
USM
-
LGW
3 stops44h 15m
Multiple Airlines
Thu 10/918:10
LGW
-
USM
3 stops21h 25m
Multiple Airlines
Deal found 18/6฿33,223
Wed 29/706:00
USM
-
LHR
2 stops19h 10m
Multiple Airlines
Thu 10/922:10
LHR
-
USM
2 stops27h 00m
Multiple Airlines
Deal found 18/6฿34,078
Wed 1/715:25
USM
-
LHR
2 stops33h 45m
Multiple Airlines
Tue 1/1217:40
LHR
-
USM
2 stops31h 45m
Multiple Airlines
Deal found 20/6฿35,392
Mon 7/914:30
USM
-
LGW
2 stops24h 15m
Multiple Airlines
Tue 6/1011:55
LGW
-
USM
3 stops22h 40m
Multiple Airlines
Deal found 18/6฿36,739
Wed 1/721:00
USM
-
LGW
2 stops39h 55m
Multiple Airlines
Tue 1/1208:40
LGW
-
USM
2 stops28h 05m
Multiple Airlines
Deal found 20/6฿37,364
Thu 5/1116:25
USM
-
LGW
2 stops26h 15m
Emirates
Mon 9/1109:40
LGW
-
USM
2 stops28h 25m
Emirates
Deal found 17/6฿39,763
Fri 20/1116:25
USM
-
LGW
2 stops21h 15m
Emirates
Tue 24/1113:35
LGW
-
USM
2 stops24h 30m
Emirates
Deal found 19/6฿40,026
Wed 18/1116:25
USM
-
LHR
2 stops26h 15m
Emirates
Sun 22/1113:40
LHR
-
USM
2 stops24h 25m
Emirates
Deal found 19/6฿40,453
Thu 5/1116:25
USM
-
LHR
2 stops26h 15m
Emirates
Mon 9/1113:40
LHR
-
USM
2 stops24h 25m
Emirates
Deal found 15/6฿40,946
Mon 7/916:25
USM
-
LCY
2 stops22h 15m
Multiple Airlines
Tue 6/1013:10
LCY
-
USM
2 stops17h 35m
Multiple Airlines
Deal found 18/6฿53,466

Find flight deals from Ko Samui to London

Discover tips and strategies to find the most affordable flight options for your journey from Ko Samui (USM) to London (LON). 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 20 June 2026.

Round-trip from

฿31,613

One-way from

฿12,718
โอมานแอร์
  • โอมานแอร์
  • 15/9-6/10
  • 4 total stops
  • 51h 35m total
  • Ko Samui to London
Search Deals
12/9
  • 12/9
  • 3 total stops
  • 44h 25m total
  • Ko Samui to London
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ko Samui to London 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 20 June 2026.
Use the filters below to find and compare flights from Ko Samui to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 15/9

15:50-19:10

2 stops33h 20m

London Heathrow

Sun 27/9

08:25-16:35

2 stops26h 10m

฿31,613

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 7/9

15:20-19:10

2 stops33h 50m

London Heathrow

Tue 6/10

20:50-13:55

2 stops35h 05m

฿31,876

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 29/7

06:00-19:10

2 stops19h 10m

London Heathrow

Thu 10/9

22:10-07:10

2 stops27h 00m

฿34,078

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Wed 1/7

21:00-06:55

2 stops39h 55m

London Gatwick

Tue 1/12

08:40-19:45

2 stops28h 05m

฿37,364

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 7/9

14:30-08:45

2 stops24h 15m

London Gatwick

Tue 6/10

09:00-11:05

2 stops20h 05m

฿38,547

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Wed 29/7

06:00-06:40

2 stops30h 40m

London Gatwick

Thu 10/9

09:00-11:05

2 stops20h 05m

฿39,730

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Thu 5/11

16:25-11:40

2 stops26h 15m

London Gatwick

Mon 9/11

09:40-21:05

2 stops28h 25m

฿39,763

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Fri 20/11

16:25-06:40

2 stops21h 15m

London Gatwick

Tue 24/11

13:35-21:05

2 stops24h 30m

฿40,026

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 18/11

16:25-11:40

2 stops26h 15m

London Heathrow

Sun 22/11

13:40-21:05

2 stops24h 25m

฿40,453

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 5/11

16:25-11:40

2 stops26h 15m

London Heathrow

Mon 9/11

13:40-21:05

2 stops24h 25m

฿40,946

Flights are sorted by cheapest return flights first.

Deals found on 20/6

Showing 1-10 of 44 resultsSorted by cheapest first
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Best time to book a flight from Ko Samui to London

Have a flexible travel schedule? Discover the best time to fly to London 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.

Cheapflights Insights

Everything you need to know about your flight from Ko Samui to London
No data available for this route at this time. Please check back soon.

Related info for your journey

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

  • What airport do you fly from for flights from Ko Samui to London?

    For a flight from Ko Samui to London, you will be flying from Ko Samui. Ko Samui (USM) is just 3.3 km from the centre of the city. Ko Samui is the only Ko Samui airport and it handles 0 outbound flights to London per day. 1 airline has flights to London from Ko Samui on a regular basis.

  • How long is the flight from Ko Samui to London?

    A quick flight from Ko Samui to London can take about 26h 15m. โอมานแอร์ provides one of the quickest options available for as low as ฿39,763. The distance between Ko Samui and London is about 9878 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What is the cheapest airline to fly from Ko Samui to London round-trip?

    According to our current data, EVA Air (฿36,814), offers the cheapest pricing from Ko Samui to London.

  • What are the most popular routes from Ko Samui to London?

    When deciding which route to take from Ko Samui to London, consider Ko Samui - London Heathrow, Ko Samui - London Gatwick or Ko Samui - London City, as they are the most popular.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ko Samui to London 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

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Top airline flying from Ko Samui to London

Discover the top airline that operate flights from Ko Samui to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 17,341 searches. Data last updated 20 June 2026.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest฿36,814Average฿41,980FlexibilityNo cancel feeOn-time74%
Search EVA Air flights

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 London?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ko Samui to London. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Cheapflights helps you find that perfect flight to London from Ko Samui by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Certainly. Search results for flights to London from Ko Samui shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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