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Cheap flights from Ko Samui to London from ฿10,456

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 26/5. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LON
5 Mar — 12 Mar1
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 3 February 2026.

Wed 11/318:30
USM
-
LHR
2 stops31h 05m
Multiple Airlines
Sat 14/321:00
LHR
-
USM
2 stops28h 25m
Multiple Airlines
Deal found 3/2฿33,957
Wed 18/307:00
USM
-
LGW
1 stop18h 30m
Multiple Airlines
Wed 25/317:00
LGW
-
USM
2 stops34h 40m
Multiple Airlines
Deal found 1/2฿34,589
Mon 9/307:55
USM
-
LHR
1 stop18h 10m
EVA Air
Wed 11/321:20
LHR
-
USM
1 stop14h 20m
EVA Air
Deal found 1/2฿41,001
Thu 19/307:55
USM
-
LGW
1 stop17h 25m
Multiple Airlines
Thu 26/309:15
LGW
-
USM
2 stops39h 35m
Multiple Airlines
Deal found 2/2฿41,728
Wed 18/309:00
USM
-
LHR
1 stop17h 05m
Multiple Airlines
Wed 25/321:05
LHR
-
USM
2 stops30h 35m
Multiple Airlines
Deal found 1/2฿42,202
Thu 19/309:00
USM
-
LHR
1 stop17h 05m
Multiple Airlines
Thu 26/306:40
LHR
-
USM
2 stops28h 45m
Multiple Airlines
Deal found 2/2฿42,802
Fri 20/315:35
USM
-
LHR
2 stops21h 40m
Qatar Airways
Fri 27/313:40
LHR
-
USM
2 stops24h 25m
Qatar Airways
Deal found 3/2฿42,865
Mon 9/320:20
USM
-
LGW
2 stops23h 15m
Qatar Airways
Wed 11/308:40
LGW
-
USM
2 stops40h 45m
Qatar Airways
Deal found 2/2฿43,844
Mon 9/316:30
USM
-
LHR
2 stops20h 55m
Qatar Airways
Wed 11/308:30
LHR
-
USM
2 stops19h 10m
Qatar Airways
Deal found 2/2฿44,950
Thu 19/308:15
USM
-
LGW
2 stops35h 20m
Qatar Airways
Thu 26/308:40
LGW
-
USM
2 stops16h 45m
Qatar Airways
Deal found 2/2฿47,793
Fri 20/319:35
USM
-
LGW
2 stops28h 45m
Multiple Airlines
Fri 27/308:10
LGW
-
USM
2 stops19h 25m
Multiple Airlines
Deal found 3/2฿49,119
Wed 18/310:00
USM
-
LCY
2 stops29h 40m
สวิส อินเตอร์เนชั่นแนล แอร์ไลน์
Wed 25/313:30
LCY
-
USM
2 stops19h 05m
สวิส อินเตอร์เนชั่นแนล แอร์ไลน์
Deal found 1/2฿50,351

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 3 February 2026.

Round-trip from

฿33,957

One-way from

฿10,456
11/3-14/3
  • 11/3-14/3
  • 4 total stops
  • 59h 30m total
  • Ko Samui to London
Search Deals
26/5
  • 26/5
  • 2 total stops
  • 39h 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 3 February 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 - LHR

USMLHR

Ko Samui

Wed 11/3

18:30-18:35

2 stops31h 05m

London Heathrow

Sat 14/3

21:00-08:25

2 stops28h 25m

฿33,957

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Wed 18/3

07:00-18:30

1 stop18h 30m

London Gatwick

Wed 25/3

17:00-10:40

2 stops34h 40m

฿34,589

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 18/3

19:00-12:05

2 stops24h 05m

London Heathrow

Wed 25/3

08:50-10:40

2 stops18h 50m

฿40,622

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 9/3

07:55-19:05

1 stop18h 10m

London Heathrow

Wed 11/3

21:20-18:40

1 stop14h 20m

฿41,001

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 18/3

09:00-19:05

1 stop17h 05m

London Heathrow

Wed 25/3

21:05-10:40

2 stops30h 35m

฿42,202

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 19/3

09:00-19:05

1 stop17h 05m

London Heathrow

Thu 26/3

06:40-18:25

2 stops28h 45m

฿42,802

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 20/3

15:35-06:15

2 stops21h 40m

London Heathrow

Fri 27/3

13:40-21:05

2 stops24h 25m

฿42,865

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 9/3

20:20-12:35

2 stops23h 15m

London Gatwick

Wed 11/3

08:40-08:25

2 stops40h 45m

฿43,844

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 9/3

16:30-06:25

2 stops20h 55m

London Heathrow

Wed 11/3

08:30-10:40

2 stops19h 10m

฿44,950

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Thu 19/3

08:15-12:35

2 stops35h 20m

London Gatwick

Thu 26/3

08:40-08:25

2 stops16h 45m

฿47,793

Flights are sorted by cheapest return flights first.

Deals found on 2/2

Showing 1-10 of 42 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
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 18h 10m. เอทิฮัดแอร์เวย์ provides one of the quickest options available for as low as ฿41,001. 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 Gatwick, Ko Samui - London Heathrow 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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