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Cheap flights from Ko Samui to London from ฿9,739

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 24/11. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LON
19 Nov — 26 Nov1
1 adult
1 adult, Economy

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 20 October 2025.

Round-trip from

฿33,072

One-way from

฿9,739

Popular in

January

Cheapest in

June

Average price

฿48,040
2/2-1/3
  • 2/2-1/3
  • 3 total stops
  • 52h 40m total
  • Ko Samui to London
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24/11
  • 24/11
  • 2 total stops
  • 40h 20m total
  • Ko Samui to London
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (฿202,936 potential increase over avg. return price).
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Cheapest flight prices on average. 6% potential price decrease (฿90,170 potential savings vs. average return price).
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Average for round-trip flights in October 2025
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Find flight deals from Ko Samui to London

Enter your travel dates to find the best prices.

Best flights from Ko Samui to London
Discover carefully curated flight deals from Ko Samui to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 20 October 2025.

Mon 2/207:15USM - LGW
1 stop18h 15mMultiple Airlines
Sun 1/314:35LGW - USM
2 stops34h 25mMultiple Airlines
Deal found 19/10฿33,072
Mon 2/213:25USM - LCY
2 stops35h 15mลุฟท์ฮันซ่า
Sun 1/317:15LCY - USM
2 stops36h 50mลุฟท์ฮันซ่า
Deal found 19/10฿33,856
Mon 2/216:25USM - LGW
2 stops32h 25mสวิส อินเตอร์เนชั่นแนล แอร์ไลน์
Sun 1/318:40LGW - USM
2 stops19h 25mสวิส อินเตอร์เนชั่นแนล แอร์ไลน์
Deal found 19/10฿36,013
Sun 1/213:25USM - LGW
2 stops24h 15mEmirates
Sun 1/313:35LGW - USM
2 stops21h 40mEmirates
Deal found 19/10฿37,353
Sat 31/111:40USM - LHR
1 stop34h 20mCathay Pacific
Sun 1/317:50LHR - USM
1 stop18h 45mCathay Pacific
Deal found 19/10฿41,602
Tue 3/219:00USM - LGW
1 stop17h 30mบริติชแอร์เวย์
Sun 1/321:15LGW - USM
1 stop16h 10mบริติชแอร์เวย์
Deal found 19/10฿43,203
Tue 3/215:50USM - LHR
2 stops21h 05mQatar Airways
Sun 1/308:40LHR - USM
2 stops19h 00mQatar Airways
Deal found 19/10฿47,125
Sun 1/213:25USM - LCY
2 stops35h 15mลุฟท์ฮันซ่า
Sun 1/317:15LCY - USM
2 stops36h 50mลุฟท์ฮันซ่า
Deal found 19/10฿33,856
Sun 1/218:40USM - LHR
2 stops51h 45mMultiple Airlines
Sun 1/310:25LHR - USM
2 stops22h 15mMultiple Airlines
Deal found 19/10฿34,445
Sat 31/107:15USM - LGW
1 stop18h 05mMultiple Airlines
Sun 1/314:35LGW - USM
2 stops34h 25mMultiple Airlines
Deal found 19/10฿34,902
Fri 30/111:40USM - LHR
1 stop34h 20mCathay Pacific
Sun 1/316:50LHR - USM
1 stop19h 45mCathay Pacific
Deal found 19/10฿41,602
Sun 1/208:55USM - LGW
2 stops34h 30mMultiple Airlines
Sun 1/316:10LGW - USM
1 stop13h 55mMultiple Airlines
Deal found 19/10฿35,850
Tue 3/216:25USM - LHR
1 stop20h 30mบริติชแอร์เวย์
Sun 1/318:40LHR - USM
1 stop19h 25mบริติชแอร์เวย์
Deal found 19/10฿45,164
Tue 3/216:25USM - LGW
2 stops21h 15mEmirates
Sun 1/313:35LGW - USM
2 stops21h 40mEmirates
Deal found 19/10฿46,765
Mon 2/213:25USM - LHR
1 stop23h 20mบริติชแอร์เวย์
Sun 1/318:40LHR - USM
1 stop19h 25mบริติชแอร์เวย์
Deal found 19/10฿45,164
Fri 30/120:20USM - LGW
2 stops24h 50mMultiple Airlines
Sun 1/316:10LGW - USM
1 stop13h 55mMultiple Airlines
Deal found 19/10฿40,000
Fri 30/119:10USM - LGW
1 stop17h 20mบริติชแอร์เวย์
Sun 1/321:15LGW - USM
1 stop15h 35mบริติชแอร์เวย์
Deal found 19/10฿45,262
Mon 2/216:25USM - LHR
2 stops22h 40mMultiple Airlines
Sun 1/321:20LHR - USM
1 stop15h 30mMultiple Airlines
Deal found 19/10฿45,687
Tue 3/216:25USM - LHR
2 stops22h 40mMultiple Airlines
Sun 1/321:20LHR - USM
1 stop15h 30mMultiple Airlines
Deal found 19/10฿45,687
Fri 30/113:25USM - LHR
2 stops29h 40mMultiple Airlines
Sun 1/310:40LHR - USM
1 stop23h 30mMultiple Airlines
Deal found 19/10฿47,876
Sat 31/113:25USM - LHR
2 stops24h 15mMultiple Airlines
Sun 1/310:40LHR - USM
1 stop23h 30mMultiple Airlines
Deal found 19/10฿48,399

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 October 2025.
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 2/2

07:15-18:30

1 stop18h 15m

London Gatwick

Sun 1/3

14:35-08:00

2 stops34h 25m

฿33,072

Ko SamuiLondon

USM - LCY

USMLCY

Ko Samui

Mon 2/2

13:25-17:40

2 stops35h 15m

London City

Sun 1/3

17:15-13:05

2 stops36h 50m

฿33,856

Ko SamuiLondon

USM - LCY

USMLCY

Ko Samui

Sun 1/2

13:25-17:40

2 stops35h 15m

London City

Sun 1/3

17:15-13:05

2 stops36h 50m

฿33,856

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 1/2

18:40-15:25

2 stops51h 45m

London Heathrow

Sun 1/3

10:25-15:40

2 stops22h 15m

฿34,445

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Sat 31/1

07:15-18:20

1 stop18h 05m

London Gatwick

Sun 1/3

14:35-08:00

2 stops34h 25m

฿34,902

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Sun 1/2

08:55-12:25

2 stops34h 30m

London Gatwick

Sun 1/3

16:10-13:05

1 stop13h 55m

฿35,850

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 2/2

16:25-17:50

2 stops32h 25m

London Gatwick

Sun 1/3

18:40-21:05

2 stops19h 25m

฿36,013

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Sun 1/2

13:25-06:40

2 stops24h 15m

London Gatwick

Sun 1/3

13:35-18:15

2 stops21h 40m

฿37,353

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Fri 30/1

20:20-14:10

2 stops24h 50m

London Gatwick

Sun 1/3

16:10-13:05

1 stop13h 55m

฿40,000

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 31/1

11:40-15:00

1 stop34h 20m

London Heathrow

Sun 1/3

17:50-19:35

1 stop18h 45m

฿41,602

Flights are sorted by cheapest return flights first.

Deals found on 19/10

Showing 1-10 of 44 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 ฿42,082.

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 32h 25m. ลุฟท์ฮันซ่า provides one of the quickest options available for as low as ฿36,013. 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 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 City, Ko Samui - London Gatwick or Ko Samui - London Heathrow, 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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