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Cheap flights from Ko Samui to London from £299

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 28/6. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LON
31 mai — 7 jun1
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 1 maio 2026.

sex 12/615:50
USM
-
LHR
2 stops21h 05m
Multiple Airlines
sex 19/622:05
LHR
-
USM
2 stops32h 40m
Multiple Airlines
Deal found 28/4£741
qui 17/915:50
USM
-
LGW
2 stops21h 05m
Multiple Airlines
dom 27/910:40
LGW
-
USM
2 stops21h 05m
Multiple Airlines
Deal found 27/4£745
sex 29/515:25
USM
-
LHR
2 stops29h 55m
Gulf Air
sex 5/610:00
LHR
-
USM
2 stops22h 45m
Gulf Air
Deal found 28/4£756
ter 15/917:25
USM
-
LHR
2 stops19h 30m
Multiple Airlines
ter 6/1021:45
LHR
-
USM
2 stops27h 25m
Multiple Airlines
Deal found 30/4£761
seg 1/608:00
USM
-
LHR
2 stops34h 45m
Multiple Airlines
dom 28/614:45
LHR
-
USM
2 stops23h 40m
Multiple Airlines
Deal found 26/4£788
qui 17/915:25
USM
-
LHR
2 stops21h 30m
Multiple Airlines
dom 27/921:45
LHR
-
USM
2 stops27h 25m
Multiple Airlines
Deal found 27/4£794
ter 15/914:00
USM
-
LHR
2 stops22h 55m
Gulf Air
ter 6/1022:05
LHR
-
USM
2 stops35h 20m
Gulf Air
Deal found 30/4£813
seg 18/515:50
USM
-
LHR
2 stops21h 05m
Gulf Air
qua 20/510:00
LHR
-
USM
2 stops24h 50m
Gulf Air
Deal found 27/4£814
qui 4/616:25
USM
-
LGW
2 stops45h 20m
Multiple Airlines
qui 11/609:15
LGW
-
USM
2 stops26h 45m
Multiple Airlines
Deal found 28/4£828
sex 12/617:55
USM
-
LGW
2 stops19h 50m
Qatar Airways
sex 19/609:00
LGW
-
USM
2 stops19h 30m
Qatar Airways
Deal found 28/4£844
ter 15/906:00
USM
-
LGW
2 stops30h 40m
Multiple Airlines
ter 6/1008:10
LGW
-
USM
2 stops20h 35m
Multiple Airlines
Deal found 29/4£861
qui 26/1116:25
USM
-
LGW
2 stops26h 15m
Emirates
dom 29/1113:35
LGW
-
USM
2 stops24h 30m
Emirates
Deal found 29/4£868

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 1 maio 2026.

Round-trip from

£723

One-way from

£294
Oman Air
  • Oman Air
  • 16/9-7/10
  • 4 total stops
  • 66h 30m total
  • Ko Samui to London
Search Deals
3/6
  • 3/6
  • 3 total stops
  • 57h 20m 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 858,174 searches. Data last updated 1 maio 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 - LGW

USMLGW

Ko Samui

qui 17/9

15:50-06:55

2 stops21h 05m

London Gatwick

dom 27/9

10:40-13:45

2 stops21h 05m

£745

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

sex 29/5

15:25-15:20

2 stops29h 55m

London Heathrow

sex 5/6

10:00-14:45

2 stops22h 45m

£756

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

ter 15/9

17:25-06:55

2 stops19h 30m

London Heathrow

ter 6/10

21:45-07:10

2 stops27h 25m

£766

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

seg 1/6

08:00-12:45

2 stops34h 45m

London Heathrow

dom 28/6

14:45-20:25

2 stops23h 40m

£788

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

qui 17/9

15:25-06:55

2 stops21h 30m

London Heathrow

dom 27/9

21:45-07:10

2 stops27h 25m

£794

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

ter 15/9

14:00-06:55

2 stops22h 55m

London Heathrow

ter 6/10

22:05-15:25

2 stops35h 20m

£813

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

seg 18/5

15:50-06:55

2 stops21h 05m

London Heathrow

qua 20/5

10:00-16:50

2 stops24h 50m

£814

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

sex 12/6

15:50-07:45

2 stops21h 55m

London Gatwick

sex 19/6

09:00-10:30

2 stops19h 30m

£851

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

ter 15/9

06:00-06:40

2 stops30h 40m

London Gatwick

ter 6/10

08:10-10:45

2 stops20h 35m

£861

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

qua 16/9

21:00-13:25

2 stops22h 25m

London Gatwick

qua 7/10

10:40-13:45

2 stops21h 05m

£910

Flights are sorted by cheapest return flights first.

Deals found on 27/4

Showing 1-10 of 48 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

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.

Bangkok (BKK) – chosen by Cheapflights users on 92% 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.

Bangkok (BKK) is the most affordable one-stop option, with an average return flight price of £935.

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 05m.

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 2h 00m.

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?

    If you book a flight to London from Ko Samui, you will be flying from Ko Samui, which is the city’s only airport. Ko Samui (USM) is located 2.1 mi from the center of Ko Samui. There are 0 flights from Ko Samui to London per day from 0 different airlines.

  • How long is the flight from Ko Samui to London?

    Gulf Air, Qatar Airways, and SWISS can get you from Ko Samui to London in just under 21h 55m. Your travel time can differ by up to 7h 30m. Ko Samui and London are separated by a distance of 6138 mi. 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?

Yes! Cheapflights helps users easily find flights from Ko Samui to London with no change fees.

Can Cheapflights notify me if prices for flights from Ko Samui to London become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to London from Ko Samui today and book when prices fit your budget.

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