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Cheap flights from Ko Samui to London from ฿11,837

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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LON
16 Feb — 23 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap 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 17 January 2026.

Round-trip from

฿27,474

One-way from

฿11,837
2/3-9/3
  • 2/3-9/3
  • 4 total stops
  • 61h 10m total
  • Ko Samui to London
Search Deals
11/6
  • 11/6
  • 3 total stops
  • 34h 55m total
  • Ko Samui to London
Search Deals

Find 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 17 January 2026.

Mon 2/319:35
USM
-
LGW
2 stops28h 45m
Multiple Airlines
Mon 9/317:00
LGW
-
USM
2 stops32h 25m
Multiple Airlines
Deal found 16/1฿27,474
Wed 21/113:25
USM
-
LHR
2 stops24h 15m
เอทิฮัดแอร์เวย์
Wed 4/208:50
LHR
-
USM
2 stops21h 15m
เอทิฮัดแอร์เวย์
Deal found 16/1฿33,377
Wed 21/118:05
USM
-
LHR
3 stops35h 35m
Multiple Airlines
Wed 4/210:00
LHR
-
USM
2 stops27h 25m
Multiple Airlines
Deal found 16/1฿35,701
Mon 2/317:05
USM
-
LHR
2 stops32h 20m
Multiple Airlines
Mon 9/321:00
LHR
-
USM
2 stops30h 40m
Multiple Airlines
Deal found 16/1฿35,921
Fri 13/216:40
USM
-
LHR
2 stops20h 15m
Multiple Airlines
Fri 20/219:20
LHR
-
USM
2 stops29h 45m
Multiple Airlines
Deal found 16/1฿37,962
Wed 21/107:15
USM
-
LHR
1 stop18h 50m
EVA Air
Wed 4/221:20
LHR
-
USM
1 stop16h 05m
EVA Air
Deal found 16/1฿40,002
Mon 9/309:20
USM
-
LHR
1 stop16h 45m
EVA Air
Wed 11/321:20
LHR
-
USM
1 stop15h 30m
EVA Air
Deal found 14/1฿40,850
Wed 21/121:20
USM
-
LHR
2 stops21h 50m
Qatar Airways
Wed 4/208:40
LHR
-
USM
2 stops19h 00m
Qatar Airways
Deal found 16/1฿42,577
Mon 9/314:05
USM
-
LGW
2 stops22h 50m
Qatar Airways
Wed 11/308:40
LGW
-
USM
2 stops40h 45m
Qatar Airways
Deal found 14/1฿43,896
Mon 2/311:40
USM
-
LCY
2 stops28h 00m
Multiple Airlines
Mon 9/319:10
LCY
-
USM
2 stops18h 55m
Multiple Airlines
Deal found 16/1฿46,063
Mon 2/308:55
USM
-
LGW
1 stop28h 30m
Singapore Airlines
Mon 9/309:25
LGW
-
USM
1 stop26h 25m
Singapore Airlines
Deal found 16/1฿49,673
Mon 9/308:55
USM
-
LGW
1 stop28h 30m
Singapore Airlines
Wed 11/309:20
LGW
-
USM
1 stop26h 30m
Singapore Airlines
Deal found 14/1฿50,772

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 17 January 2026.
Use the filters below to find and compare flights from Ko Samui to London that are best for you.

Fly from

Ko Samui

Fly to

London

Route

Depart

Return

Price

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 2/3

19:35-17:20

2 stops28h 45m

London Gatwick

Mon 9/3

17:00-08:25

2 stops32h 25m

฿27,474

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 2/3

17:05-18:25

2 stops32h 20m

London Heathrow

Mon 9/3

21:00-10:40

2 stops30h 40m

฿35,921

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 13/2

16:40-05:55

2 stops20h 15m

London Heathrow

Fri 20/2

19:20-08:05

2 stops29h 45m

฿37,962

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 9/3

09:20-19:05

1 stop16h 45m

London Heathrow

Wed 11/3

21:20-19:50

1 stop15h 30m

฿40,850

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 9/3

14:05-05:55

2 stops22h 50m

London Gatwick

Wed 11/3

08:40-08:25

2 stops40h 45m

฿43,896

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 9/3

15:35-06:25

2 stops21h 50m

London Heathrow

Wed 11/3

08:30-11:55

2 stops20h 25m

฿44,995

Ko SamuiLondon

USM - LCY

USMLCY

Ko Samui

Mon 2/3

11:40-08:40

2 stops28h 00m

London City

Mon 9/3

19:10-21:05

2 stops18h 55m

฿46,063

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 2/3

08:55-06:25

1 stop28h 30m

London Gatwick

Mon 9/3

09:25-18:50

1 stop26h 25m

฿49,673

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 9/3

08:55-06:25

1 stop28h 30m

London Gatwick

Wed 11/3

09:20-18:50

1 stop26h 30m

฿50,772

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 24/3

06:45-16:20

2 stops40h 35m

฿12,120

Flights are sorted by cheapest return flights first.

Deals found on 16/1

Showing 1-10 of 39 results
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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

What’s the top stopover airport for flights from Ko Samui to London?

Share of one-stop return flights from Ko Samui to London chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Singapore (SIN) – chosen by Cheapflights users on 75% of one-stop itineraries from Ko Samui to London on Cheapflights.

What’s the cheapest stopover airport for flights from Ko Samui to London?

Average return fare for one-stop flights from Ko Samui to London, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Singapore (SIN) is the most affordable one-stop option, with an average return flight price of ฿40,432.

What’s the fastest stopover option from Ko Samui to London?

Shortest average travel time for one-stop one-way flights from Ko Samui to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Bangkok (BKK) have the shortest average one-way travel time for one-stop routes: 16h 35m.

Which airport typically offers the quickest stopover for flights from Ko Samui to London?

Average stopover duration for one-stop one-way flights from Ko Samui to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Bangkok (BKK) offer the fastest connection on this route, with an average stopover time of 3h 20m.

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 16h 45m. EVA Air provides one of the quickest options available for as low as ฿40,850. 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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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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