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Cheap flights from Ko Samui to London from £290

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 18/11. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LON
25 Aug — 1 Sep1
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 26 July 2026.

Thu 3/908:40
USM
-
LGW
2 stops28h 25m
Multiple Airlines
Sun 6/912:35
LGW
-
USM
2 stops25h 50m
Multiple Airlines
Deal found 21/7£722
Thu 17/913:30
USM
-
LGW
2 stops23h 25m
Multiple Airlines
Wed 30/906:55
LGW
-
USM
3 stops29h 55m
Multiple Airlines
Deal found 24/7£723
Thu 17/919:00
USM
-
LHR
2 stops22h 30m
Multiple Airlines
Wed 30/912:30
LHR
-
USM
2 stops22h 35m
Multiple Airlines
Deal found 24/7£735
Tue 8/917:55
USM
-
LGW
3 stops23h 10m
Multiple Airlines
Tue 15/912:35
LGW
-
USM
2 stops25h 50m
Multiple Airlines
Deal found 25/7£746
Mon 7/911:25
USM
-
LHR
2 stops30h 05m
Multiple Airlines
Mon 14/912:30
LHR
-
USM
2 stops26h 20m
Multiple Airlines
Deal found 24/7£761
Thu 3/917:25
USM
-
LHR
2 stops27h 55m
Multiple Airlines
Sun 6/922:05
LHR
-
USM
2 stops33h 40m
Multiple Airlines
Deal found 22/7£783
Tue 8/911:25
USM
-
LHR
2 stops30h 05m
Multiple Airlines
Tue 15/910:00
LHR
-
USM
2 stops20h 45m
Multiple Airlines
Deal found 25/7£810
Mon 7/920:35
USM
-
LGW
2 stops26h 05m
Multiple Airlines
Mon 14/911:40
LGW
-
USM
2 stops23h 10m
Multiple Airlines
Deal found 24/7£810
Mon 3/807:50
USM
-
LGW
2 stops28h 40m
Multiple Airlines
Fri 14/813:50
LGW
-
USM
3 stops24h 35m
Multiple Airlines
Deal found 23/7£815
Wed 2/915:50
USM
-
LGW
2 stops20h 40m
Multiple Airlines
Mon 21/912:35
LGW
-
USM
2 stops25h 50m
Multiple Airlines
Deal found 23/7£850
Tue 15/915:50
USM
-
LHR
2 stops21h 05m
Gulf Air
Tue 6/1010:00
LHR
-
USM
2 stops23h 10m
Gulf Air
Deal found 24/7£864
Thu 17/909:15
USM
-
LCY
2 stops29h 25m
SWISS
Wed 30/913:10
LCY
-
USM
2 stops17h 35m
SWISS
Deal found 24/7£1,167

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 26 July 2026.

Round-trip from

£722

One-way from

£290
3/9-6/9
  • 3/9-6/9
  • 4 total stops
  • 54h 15m total
  • Ko Samui to London
Search Deals
18/11
  • 18/11
  • 3 total stops
  • 29h 10m 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 26 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 3/9

08:40-07:05

2 stops28h 25m

London Gatwick

Sun 6/9

12:35-20:25

2 stops25h 50m

£722

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Tue 8/9

17:55-11:05

3 stops23h 10m

London Gatwick

Tue 15/9

12:35-20:25

2 stops25h 50m

£746

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 7/9

11:25-11:30

2 stops30h 05m

London Heathrow

Mon 14/9

12:30-20:50

2 stops26h 20m

£761

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Wed 5/8

18:15-12:35

2 stops24h 20m

London Gatwick

Thu 27/8

12:35-20:25

2 stops25h 50m

£818

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 7/9

15:30-06:35

2 stops21h 05m

London Gatwick

Mon 14/9

12:35-20:30

2 stops25h 55m

£863

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 15/9

15:50-06:55

2 stops21h 05m

London Heathrow

Tue 6/10

10:00-15:10

2 stops23h 10m

£864

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Wed 2/9

15:50-06:30

2 stops20h 40m

London Gatwick

Mon 21/9

06:55-15:10

3 stops26h 15m

£877

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Tue 22/9

16:25-07:20

2 stops20h 55m

London Gatwick

Sat 26/9

10:05-21:10

2 stops29h 05m

£897

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 26/10

16:25-06:40

2 stops21h 15m

London Gatwick

Sat 31/10

13:35-21:05

2 stops24h 30m

£900

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 4/10

16:25-14:25

2 stops28h 00m

London Heathrow

Wed 7/10

14:25-21:10

2 stops24h 45m

£908

Flights are sorted by cheapest return flights first.

Deals found on 22/7

Showing 1-10 of 43 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, SWISS, and KLM can get you from Ko Samui to London in just under 21h 05m. Your travel time can differ by up to 8h 20m. 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?

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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