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Cheap flights from Ko Samui to London from £293

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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LON
24 Jul — 31 Jul1
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 24 June 2026.

Wed 16/1219:00
USM
-
LGW
1 stop25h 05m
Multiple Airlines
Tue 5/111:05
LGW
-
USM
2 stops37h 05m
Multiple Airlines
Deal found 20/6£704
Wed 16/1219:00
USM
-
LGW
1 stop25h 05m
Multiple Airlines
Mon 4/111:05
LGW
-
USM
2 stops37h 05m
Multiple Airlines
Deal found 20/6£706
Sun 13/908:45
USM
-
LHR
2 stops27h 45m
Oman Air
Wed 16/920:50
LHR
-
USM
2 stops18h 00m
Oman Air
Deal found 23/6£722
Tue 15/906:00
USM
-
LHR
2 stops19h 10m
Oman Air
Tue 6/1020:50
LHR
-
USM
2 stops32h 25m
Oman Air
Deal found 20/6£728
Tue 15/914:35
USM
-
LHR
2 stops34h 35m
Oman Air
Sun 27/920:50
LHR
-
USM
2 stops17h 40m
Oman Air
Deal found 22/6£729
Mon 7/915:25
USM
-
LHR
2 stops33h 45m
Oman Air
Fri 25/920:50
LHR
-
USM
2 stops18h 00m
Oman Air
Deal found 20/6£729
Tue 15/1211:10
USM
-
LGW
1 stop16h 40m
Multiple Airlines
Tue 5/111:05
LGW
-
USM
2 stops37h 05m
Multiple Airlines
Deal found 20/6£743
Tue 15/1211:10
USM
-
LGW
1 stop16h 40m
Multiple Airlines
Mon 4/111:05
LGW
-
USM
2 stops37h 05m
Multiple Airlines
Deal found 20/6£746
Wed 16/1218:15
USM
-
LGW
1 stop25h 50m
Multiple Airlines
Wed 6/109:50
LGW
-
USM
1 stop15h 35m
Multiple Airlines
Deal found 20/6£766
Mon 3/820:35
USM
-
LHR
2 stops28h 35m
Multiple Airlines
Wed 19/820:50
LHR
-
USM
2 stops33h 55m
Multiple Airlines
Deal found 23/6£769
Mon 14/915:25
USM
-
LHR
2 stops27h 20m
Multiple Airlines
Sat 26/917:10
LHR
-
USM
3 stops22h 25m
Multiple Airlines
Deal found 22/6£782
Sun 19/706:00
USM
-
LHR
2 stops30h 30m
Oman Air
Tue 11/820:50
LHR
-
USM
2 stops30h 30m
Oman Air
Deal found 24/6£797

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 24 June 2026.

Round-trip from

£704

One-way from

£293
16/12-5/1
  • 16/12-5/1
  • 3 total stops
  • 62h 10m total
  • Ko Samui to London
Search Deals
12/9
  • 12/9
  • 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 24 June 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 - LHR

USMLHR

Ko Samui

Tue 15/9

11:45-19:10

2 stops37h 25m

London Heathrow

Tue 6/10

20:50-12:45

2 stops33h 55m

£722

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 13/9

08:45-06:30

2 stops27h 45m

London Heathrow

Wed 16/9

20:50-20:50

2 stops18h 00m

£722

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 15/9

15:50-19:10

2 stops33h 20m

London Heathrow

Sun 27/9

08:25-16:35

2 stops26h 10m

£728

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 15/9

11:45-19:10

2 stops37h 25m

London Heathrow

Sat 26/9

20:50-10:45

2 stops31h 55m

£729

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 3/8

19:50-14:30

2 stops24h 40m

London Gatwick

Wed 19/8

11:00-15:10

2 stops22h 10m

£875

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Tue 15/9

16:25-07:20

2 stops20h 55m

London Gatwick

Sat 19/9

14:35-21:10

2 stops24h 35m

£914

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Fri 20/11

16:25-06:40

2 stops21h 15m

London Gatwick

Tue 24/11

13:35-21:05

2 stops24h 30m

£920

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Sat 1/8

14:30-08:45

2 stops24h 15m

London Gatwick

Thu 27/8

06:00-10:30

3 stops22h 30m

£927

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Tue 8/9

14:30-07:20

2 stops22h 50m

London Gatwick

Tue 22/9

10:05-11:15

2 stops19h 10m

£928

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Tue 8/9

14:30-07:20

2 stops22h 50m

London Gatwick

Sat 19/9

10:05-11:15

2 stops19h 10m

£928

Flights are sorted by cheapest return flights first.

Deals found on 22/6

Showing 1-10 of 55 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?

    Oman Air, Emirates, and KLM can get you from Ko Samui to London in just under 19h 35m. Your travel time can differ by up to 17h 50m. Ko Samui and London are separated by a distance of 6123 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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