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Cheap flights from Ko Samui to London from ฿11,254

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 19/5. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LON
19 Apr — 26 Apr1
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 March 2026.

Wed 29/413:30
USM
-
LHR
2 stops23h 25m
Multiple Airlines
Wed 6/521:20
LHR
-
USM
2 stops31h 10m
Multiple Airlines
Deal found 15/3฿31,604
Fri 8/506:00
USM
-
LHR
2 stops18h 45m
Multiple Airlines
Fri 5/614:45
LHR
-
USM
2 stops18h 40m
Multiple Airlines
Deal found 15/3฿32,225
Wed 13/507:50
USM
-
LGW
2 stops28h 50m
Multiple Airlines
Wed 27/509:00
LGW
-
USM
2 stops29h 50m
Multiple Airlines
Deal found 18/3฿32,978
Wed 13/506:00
USM
-
LHR
2 stops18h 45m
Multiple Airlines
Wed 27/514:45
LHR
-
USM
2 stops24h 05m
Multiple Airlines
Deal found 18/3฿33,468
Fri 8/506:00
USM
-
LGW
2 stops39h 00m
Multiple Airlines
Fri 5/618:00
LGW
-
USM
2 stops21h 35m
Multiple Airlines
Deal found 15/3฿34,057
Sun 3/506:00
USM
-
LHR
2 stops39h 05m
Multiple Airlines
Sun 10/514:40
LHR
-
USM
2 stops24h 55m
Multiple Airlines
Deal found 19/3฿34,744
Tue 21/708:40
USM
-
LGW
3 stops28h 45m
Multiple Airlines
Wed 26/810:25
LGW
-
USM
3 stops26h 25m
Multiple Airlines
Deal found 17/3฿35,202
Mon 4/517:25
USM
-
LHR
2 stops19h 30m
Multiple Airlines
Mon 11/510:00
LHR
-
USM
2 stops23h 10m
Multiple Airlines
Deal found 19/3฿35,235
Sun 31/507:50
USM
-
LGW
2 stops37h 10m
Multiple Airlines
Tue 30/611:35
LGW
-
USM
2 stops24h 10m
Multiple Airlines
Deal found 17/3฿35,987
Wed 29/419:45
USM
-
LGW
2 stops22h 50m
Multiple Airlines
Wed 6/518:00
LGW
-
USM
2 stops32h 25m
Multiple Airlines
Deal found 15/3฿36,380
Tue 21/408:20
USM
-
LHR
2 stops37h 00m
Multiple Airlines
Fri 1/520:45
LHR
-
USM
2 stops29h 30m
Multiple Airlines
Deal found 16/3฿36,445
Thu 11/615:50
USM
-
LHR
2 stops21h 05m
กัลฟ์แอร์
Mon 15/610:00
LHR
-
USM
2 stops21h 45m
กัลฟ์แอร์
Deal found 18/3฿36,904

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 March 2026.

Round-trip from

฿31,604

One-way from

฿11,254
29/4-6/5
  • 29/4-6/5
  • 4 total stops
  • 54h 35m total
  • Ko Samui to London
Search Deals
19/5
  • 19/5
  • 2 total stops
  • 43h 30m 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 March 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 - LGW

USMLGW

Ko Samui

Wed 13/5

07:50-06:40

2 stops28h 50m

London Gatwick

Wed 27/5

09:00-20:50

2 stops29h 50m

฿32,978

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 3/5

06:00-15:05

2 stops39h 05m

London Heathrow

Sun 10/5

14:40-21:35

2 stops24h 55m

฿34,744

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 13/5

17:25-06:20

3 stops42h 55m

London Heathrow

Wed 27/5

21:45-21:35

2 stops17h 50m

฿35,922

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 11/6

15:50-06:55

2 stops21h 05m

London Heathrow

Mon 15/6

10:00-13:45

2 stops21h 45m

฿36,904

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Tue 21/4

08:40-06:55

2 stops28h 15m

London Gatwick

Fri 1/5

10:40-15:25

2 stops22h 45m

฿38,245

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Fri 12/6

19:00-12:35

2 stops23h 35m

London Gatwick

Tue 16/6

14:35-18:00

2 stops21h 25m

฿38,408

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Thu 7/5

17:35-06:40

2 stops19h 05m

London Gatwick

Sun 7/6

09:00-10:30

2 stops19h 30m

฿38,703

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Wed 15/4

08:40-17:50

3 stops39h 10m

London Gatwick

Wed 22/4

12:35-20:25

2 stops25h 50m

฿39,488

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 21/5

07:50-19:20

1 stop17h 30m

London Heathrow

Mon 25/5

21:35-20:50

1 stop17h 15m

฿39,684

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 21/5

17:25-07:05

2 stops19h 40m

London Heathrow

Mon 25/5

14:25-16:55

2 stops20h 30m

฿39,848

Flights are sorted by cheapest return flights first.

Deals found on 18/3

Showing 1-10 of 54 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 19h 15m. กัลฟ์แอร์ provides one of the quickest options available for as low as ฿37,885. 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 (฿36,650), 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 City or Ko Samui - London Gatwick, 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

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Brentford
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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 March 2026.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest฿36,650Average฿41,794FlexibilityNo 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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