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Cheap flights from Ko Samui to London from ฿10,775

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 6/11. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LON
3 Sep — 10 Sep1
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 4 August 2026.

Sun 13/915:25
USM
-
LHR
2 stops26h 05m
Multiple Airlines
Sun 20/912:30
LHR
-
USM
2 stops22h 05m
Multiple Airlines
Deal found 30/7฿32,657
Sat 19/914:35
USM
-
LGW
2 stops22h 20m
Multiple Airlines
Sat 26/922:00
LGW
-
USM
2 stops31h 40m
Multiple Airlines
Deal found 3/8฿32,691
Thu 17/911:05
USM
-
LGW
2 stops25h 35m
Multiple Airlines
Thu 1/1009:00
LGW
-
USM
2 stops27h 50m
Multiple Airlines
Deal found 31/7฿33,858
Wed 16/918:25
USM
-
LHR
2 stops23h 40m
Multiple Airlines
Sun 27/912:35
LHR
-
USM
2 stops38h 45m
Multiple Airlines
Deal found 2/8฿34,359
Fri 11/915:25
USM
-
LHR
2 stops26h 05m
Multiple Airlines
Sun 13/920:35
LHR
-
USM
2 stops29h 50m
Multiple Airlines
Deal found 1/8฿34,525
Thu 17/917:35
USM
-
LHR
2 stops23h 55m
Multiple Airlines
Thu 1/1020:45
LHR
-
USM
2 stops28h 25m
Multiple Airlines
Deal found 31/7฿34,659
Thu 27/818:15
USM
-
LHR
2 stops32h 10m
Multiple Airlines
Sun 30/819:00
LHR
-
USM
2 stops30h 45m
Multiple Airlines
Deal found 1/8฿35,960
Tue 15/915:20
USM
-
LHR
2 stops21h 35m
กัลฟ์แอร์
Tue 6/1022:05
LHR
-
USM
2 stops37h 00m
กัลฟ์แอร์
Deal found 30/7฿36,527
Thu 27/818:15
USM
-
LGW
2 stops29h 50m
Multiple Airlines
Sun 30/818:00
LGW
-
USM
2 stops31h 45m
Multiple Airlines
Deal found 1/8฿36,727
Sat 19/906:00
USM
-
LHR
1 stop19h 15m
Multiple Airlines
Sat 26/922:10
LHR
-
USM
2 stops27h 00m
Multiple Airlines
Deal found 3/8฿37,861
Sun 13/913:30
USM
-
LGW
2 stops23h 10m
Multiple Airlines
Sun 20/911:35
LGW
-
USM
2 stops21h 35m
Multiple Airlines
Deal found 30/7฿37,894
Thu 12/1116:25
USM
-
LGW
2 stops26h 15m
Emirates
Mon 16/1113:35
LGW
-
USM
2 stops24h 30m
Emirates
Deal found 3/8฿38,295

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 4 August 2026.

Round-trip from

฿32,657

One-way from

฿10,775
13/9-20/9
  • 13/9-20/9
  • 4 total stops
  • 48h 10m total
  • Ko Samui to London
Search Deals
6/11
  • 6/11
  • 2 total stops
  • 43h 05m 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 4 August 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

Thu 27/8

18:15-20:25

2 stops32h 10m

London Heathrow

Sun 30/8

19:00-07:45

2 stops30h 45m

฿35,960

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 15/9

15:20-06:55

2 stops21h 35m

London Heathrow

Tue 6/10

22:05-17:05

2 stops37h 00m

฿36,527

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Thu 27/8

18:15-18:05

2 stops29h 50m

London Gatwick

Sun 30/8

18:00-07:45

2 stops31h 45m

฿36,727

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Thu 12/11

16:25-11:40

2 stops26h 15m

London Gatwick

Mon 16/11

13:35-21:05

2 stops24h 30m

฿38,295

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 12/11

16:25-07:10

2 stops21h 45m

London Heathrow

Mon 16/11

13:40-21:05

2 stops24h 25m

฿39,429

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Wed 23/9

16:25-12:35

2 stops26h 10m

London Gatwick

Sat 26/9

10:05-21:10

2 stops29h 05m

฿40,330

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 15/9

09:15-19:20

1 stop16h 05m

London Heathrow

Tue 6/10

21:35-21:35

1 stop18h 00m

฿44,399

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 15/9

09:15-19:20

1 stop16h 05m

London Heathrow

Tue 6/10

21:35-20:30

1 stop16h 55m

฿44,399

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 26/10

15:50-06:25

2 stops21h 35m

London Heathrow

Wed 28/10

09:25-10:40

2 stops18h 15m

฿44,566
Fastest return journey

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Wed 23/9

19:15-05:55

1 stop16h 40m

London Gatwick

Sat 26/9

22:15-20:30

1 stop16h 15m

฿45,700

Flights are sorted by cheapest return flights first.

Deals found on 2/8

Showing 1-10 of 50 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. 0 airlines have 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 21h 35m. กัลฟ์แอร์ provides one of the quickest options available for as low as ฿36,527. The distance between Ko Samui and London is about 9888 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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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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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