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Cheap flights from Ko Samui to London from ฿12,053

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
16 Oct — 23 Oct1
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 16 September 2025.

Round-trip from

฿25,664

One-way from

฿12,053

Popular in

January

Cheapest in

October

Average price

฿49,039
29/10-5/11
  • 29/10-5/11
  • 3 total stops
  • 37h 05m total
  • Ko Samui to London
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24/11
  • 24/11
  • 3 total stops
  • 42h 50m total
  • Ko Samui to London
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Highest demand for flights based on searches. 15% potential increase in price (฿240,515 potential increase over avg. return price).
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Cheapest flight prices on average. 6% potential price decrease (฿81,960 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Find flight deals from Ko Samui to London

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 16 September 2025.

Wed 29/1007:00USM - LGW
1 stop18h 30mMultiple Airlines
Wed 5/1106:35LGW - USM
2 stops18h 35mMultiple Airlines
Deal found 14/9฿25,664
Thu 30/1008:30USM - LGW
1 stop17h 00mMultiple Airlines
Thu 6/1110:30LGW - USM
2 stops37h 40mMultiple Airlines
Deal found 15/9฿31,866
Wed 29/1010:00USM - LHR
2 stops18h 40mMultiple Airlines
Wed 5/1117:10LHR - USM
2 stops20h 55mMultiple Airlines
Deal found 14/9฿32,311
Thu 30/1010:00USM - LHR
2 stops29h 05mMultiple Airlines
Thu 6/1118:40LHR - USM
2 stops35h 25mMultiple Airlines
Deal found 15/9฿32,661
Thu 30/1008:15USM - LCY
2 stops31h 30mสวิส อินเตอร์เนชั่นแนล แอร์ไลน์
Thu 6/1119:10LCY - USM
2 stops18h 55mสวิส อินเตอร์เนชั่นแนล แอร์ไลน์
Deal found 15/9฿36,064
Wed 29/1010:00USM - LCY
2 stops29h 35mสวิส อินเตอร์เนชั่นแนล แอร์ไลน์
Wed 5/1119:10LCY - USM
2 stops18h 55mสวิส อินเตอร์เนชั่นแนล แอร์ไลน์
Deal found 14/9฿36,700
Wed 29/1008:30USM - LHR
1 stop17h 35mEVA Air
Wed 5/1121:20LHR - USM
1 stop16h 05mEVA Air
Deal found 14/9฿38,099
Fri 10/1013:30USM - LHR
2 stops22h 55mQatar Airways
Mon 20/1015:05LHR - USM
2 stops21h 10mQatar Airways
Deal found 14/9฿40,961
Thu 30/1008:15USM - LGW
2 stops29h 25mEmirates
Thu 6/1109:40LGW - USM
2 stops24h 50mEmirates
Deal found 15/9฿42,202
Fri 10/1008:45USM - LHR
1 stop16h 35mEVA Air
Mon 20/1021:35LHR - USM
1 stop18h 00mEVA Air
Deal found 14/9฿46,559
Fri 10/1013:30USM - LGW
2 stops23h 10mQatar Airways
Mon 20/1009:00LGW - USM
2 stops19h 30mQatar Airways
Deal found 14/9฿50,216
Thu 30/1019:45USM - LGW
1 stop17h 40mSingapore Airlines
Thu 6/1109:20LGW - USM
1 stop26h 30mSingapore Airlines
Deal found 15/9฿59,057

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 16 September 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

Wed 29/10

07:00-18:30

1 stop18h 30m

London Gatwick

Wed 5/11

06:35-08:10

2 stops18h 35m

฿25,664

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Thu 30/10

08:30-18:30

1 stop17h 00m

London Gatwick

Thu 6/11

10:30-07:10

2 stops37h 40m

฿31,866

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 29/10

10:00-21:40

2 stops18h 40m

London Heathrow

Wed 5/11

17:10-21:05

2 stops20h 55m

฿32,311

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 30/10

10:00-08:05

2 stops29h 05m

London Heathrow

Thu 6/11

18:40-13:05

2 stops35h 25m

฿32,661

Ko SamuiLondon

USM - LCY

USMLCY

Ko Samui

Thu 30/10

08:15-08:45

2 stops31h 30m

London City

Thu 6/11

19:10-21:05

2 stops18h 55m

฿36,064

Ko SamuiLondon

USM - LCY

USMLCY

Ko Samui

Wed 29/10

10:00-08:35

2 stops29h 35m

London City

Wed 5/11

19:10-21:05

2 stops18h 55m

฿36,700

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 29/10

08:30-19:05

1 stop17h 35m

London Heathrow

Wed 5/11

21:20-20:25

1 stop16h 05m

฿38,099

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 10/10

13:30-06:25

2 stops22h 55m

London Heathrow

Mon 20/10

15:05-18:15

2 stops21h 10m

฿40,961

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Thu 30/10

08:15-06:40

2 stops29h 25m

London Gatwick

Thu 6/11

09:40-17:30

2 stops24h 50m

฿42,202

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 10/10

08:45-19:20

1 stop16h 35m

London Heathrow

Mon 20/10

21:35-21:35

1 stop18h 00m

฿46,559

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 28 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 ฿40,951.

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 23h 05m. สวิส อินเตอร์เนชั่นแนล แอร์ไลน์ provides one of the quickest options available for as low as ฿71,173. The distance between Ko Samui and London is about 9854 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.

  • What is the cheapest month to book a flight from Ko Samui to London?

    Currently, December is the cheapest month in which you can book a flight from Ko Samui to London (average of ฿810). Flying from Ko Samui to London in July is currently the most expensive (average of ฿1,014). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
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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.

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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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