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Cheap flights from Ko Samui to London from £295

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 26/9. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LON
9 Aug — 16 Aug1
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 10 July 2026.

Thu 20/818:15
USM
-
LGW
2 stops33h 15m
Multiple Airlines
Sun 23/811:10
LGW
-
USM
3 stops38h 35m
Multiple Airlines
Deal found 7/7£755
Tue 18/818:15
USM
-
LHR
2 stops30h 25m
Multiple Airlines
Tue 25/822:15
LHR
-
USM
2 stops27h 30m
Multiple Airlines
Deal found 5/7£773
Tue 15/915:50
USM
-
LHR
2 stops21h 05m
Gulf Air
Tue 6/1010:00
LHR
-
USM
2 stops23h 10m
Gulf Air
Deal found 6/7£791
Wed 19/818:15
USM
-
LHR
2 stops30h 25m
Multiple Airlines
Wed 26/817:10
LHR
-
USM
3 stops21h 35m
Multiple Airlines
Deal found 5/7£821
Sun 9/818:25
USM
-
LGW
2 stops30h 45m
Multiple Airlines
Sun 16/818:10
LGW
-
USM
2 stops31h 35m
Multiple Airlines
Deal found 5/7£831
Thu 20/818:15
USM
-
LGW
2 stops33h 15m
Multiple Airlines
Thu 27/817:30
LGW
-
USM
3 stops21h 15m
Multiple Airlines
Deal found 6/7£879
Tue 21/708:00
USM
-
LGW
3 stops42h 15m
Multiple Airlines
Tue 11/818:00
LGW
-
USM
2 stops20h 45m
Multiple Airlines
Deal found 9/7£882
Mon 3/819:45
USM
-
LGW
2 stops22h 50m
Multiple Airlines
Mon 10/813:50
LGW
-
USM
3 stops24h 35m
Multiple Airlines
Deal found 6/7£891
Fri 21/806:00
USM
-
LHR
1 stop19h 15m
Multiple Airlines
Fri 28/822:40
LHR
-
USM
2 stops26h 30m
Multiple Airlines
Deal found 10/7£906
Sun 13/916:25
USM
-
LHR
2 stops20h 40m
Emirates
Wed 16/909:05
LHR
-
USM
2 stops30h 05m
Emirates
Deal found 6/7£911
Tue 15/917:55
USM
-
LGW
2 stops42h 45m
Qatar Airways
Sat 19/909:00
LGW
-
USM
2 stops25h 55m
Qatar Airways
Deal found 7/7£912
Tue 15/909:15
USM
-
LHR
1 stop16h 05m
Multiple Airlines
Tue 6/1022:05
LHR
-
USM
2 stops33h 40m
Multiple Airlines
Deal found 7/7£915

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 10 July 2026.

Round-trip from

£755

One-way from

£295
20/8-23/8
  • 20/8-23/8
  • 5 total stops
  • 71h 50m total
  • Ko Samui to London
Search Deals
26/9
  • 26/9
  • 3 total stops
  • 44h 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 858,174 searches. Data last updated 10 July 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

Thu 20/8

18:15-21:30

2 stops33h 15m

London Gatwick

Sun 23/8

11:10-07:45

3 stops38h 35m

£755

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 15/9

15:50-06:55

2 stops21h 05m

London Heathrow

Tue 6/10

22:05-13:45

2 stops33h 40m

£815

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 19/8

18:15-18:40

2 stops30h 25m

London Heathrow

Wed 26/8

17:10-20:45

3 stops21h 35m

£821

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Fri 21/8

09:15-06:30

3 stops27h 15m

London Gatwick

Fri 28/8

12:35-20:25

2 stops25h 50m

£850

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 21/8

06:00-19:15

1 stop19h 15m

London Heathrow

Fri 28/8

22:40-07:10

2 stops26h 30m

£906

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 13/9

16:25-07:05

2 stops20h 40m

London Heathrow

Wed 16/9

09:05-21:10

2 stops30h 05m

£911

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Tue 15/9

17:55-06:40

2 stops42h 45m

London Gatwick

Sat 19/9

09:00-16:55

2 stops25h 55m

£912

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Tue 21/7

08:45-15:00

2 stops36h 15m

London Gatwick

Tue 11/8

18:00-21:35

2 stops21h 35m

£916

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 22/8

06:00-10:15

2 stops34h 15m

London Heathrow

Sat 29/8

12:30-17:05

2 stops22h 35m

£919

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Tue 15/9

19:00-12:35

2 stops23h 35m

London Gatwick

Sat 19/9

10:05-16:55

2 stops24h 50m

£920

Flights are sorted by cheapest return flights first.

Deals found on 8/7

Showing 1-10 of 47 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
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?

    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, Emirates, and Qatar Airways can get you from Ko Samui to London in just under 20h 40m. Your travel time can differ by up to 22h 05m. Ko Samui and London are separated by a distance of 6144 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 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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How does Cheapflights help users find flights from Ko Samui to London?

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Why should you use Cheapflights to find cheap flight tickets from Ko Samui to London?

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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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