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Cheap flights from Ko Samui to London from £330

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 7/7. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LON
28 Jun — 5 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 29 May 2026.

Mon 6/708:40
USM
-
LGW
3 stops28h 40m
Multiple Airlines
Mon 13/710:25
LGW
-
USM
3 stops26h 25m
Multiple Airlines
Deal found 28/5£793
Mon 16/1109:20
USM
-
LHR
2 stops19h 20m
Multiple Airlines
Thu 3/1206:40
LHR
-
USM
2 stops41h 30m
Multiple Airlines
Deal found 25/5£819
Tue 15/914:00
USM
-
LHR
2 stops31h 20m
Gulf Air
Tue 6/1022:05
LHR
-
USM
2 stops35h 20m
Gulf Air
Deal found 25/5£821
Thu 18/615:25
USM
-
LGW
2 stops21h 30m
Multiple Airlines
Thu 2/709:00
LGW
-
USM
2 stops19h 30m
Multiple Airlines
Deal found 28/5£841
Thu 18/615:25
USM
-
LHR
2 stops21h 30m
Multiple Airlines
Thu 2/708:25
LHR
-
USM
2 stops20h 05m
Multiple Airlines
Deal found 28/5£871
Mon 21/915:25
USM
-
LHR
2 stops33h 45m
Oman Air
Wed 23/920:50
LHR
-
USM
2 stops31h 55m
Oman Air
Deal found 28/5£885
Mon 16/1116:30
USM
-
LGW
2 stops20h 25m
Multiple Airlines
Thu 3/1208:40
LGW
-
USM
2 stops39h 30m
Multiple Airlines
Deal found 25/5£885
Thu 9/706:00
USM
-
LHR
1 stop19h 20m
Multiple Airlines
Thu 16/721:35
LHR
-
USM
1 stop15h 25m
Multiple Airlines
Deal found 25/5£904
Mon 8/615:25
USM
-
LGW
2 stops21h 55m
Qatar Airways
Thu 11/609:05
LGW
-
USM
2 stops29h 20m
Qatar Airways
Deal found 24/5£922
Thu 9/706:00
USM
-
LGW
3 stops31h 05m
Multiple Airlines
Thu 16/710:25
LGW
-
USM
3 stops26h 25m
Multiple Airlines
Deal found 25/5£927
Mon 6/717:55
USM
-
LGW
2 stops18h 45m
Qatar Airways
Mon 13/709:00
LGW
-
USM
2 stops19h 30m
Qatar Airways
Deal found 28/5£941
Tue 9/615:50
USM
-
LHR
2 stops21h 05m
Gulf Air
Thu 11/610:00
LHR
-
USM
2 stops23h 45m
Gulf Air
Deal found 24/5£946

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 29 May 2026.

Round-trip from

£793

One-way from

£330
6/7-13/7
  • 6/7-13/7
  • 6 total stops
  • 55h 05m total
  • Ko Samui to London
Search Deals
7/7
  • 7/7
  • 2 total stops
  • 21h 30m 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 29 May 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

Mon 16/11

09:20-21:40

2 stops19h 20m

London Heathrow

Thu 3/12

06:40-07:10

2 stops41h 30m

£819

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 15/9

15:25-15:20

2 stops29h 55m

London Heathrow

Tue 6/10

22:05-13:45

2 stops33h 40m

£821

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 21/9

15:25-19:10

2 stops33h 45m

London Heathrow

Wed 23/9

20:50-10:45

2 stops31h 55m

£885

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 16/11

16:30-05:55

2 stops20h 25m

London Gatwick

Thu 3/12

08:40-07:10

2 stops39h 30m

£885

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 8/6

15:25-07:20

2 stops21h 55m

London Gatwick

Thu 11/6

09:05-20:25

2 stops29h 20m

£922

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 6/7

17:55-06:40

2 stops18h 45m

London Gatwick

Mon 13/7

09:00-10:30

2 stops19h 30m

£941

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 9/6

15:50-06:55

2 stops21h 05m

London Heathrow

Thu 11/6

10:00-15:45

2 stops23h 45m

£946

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 18/6

08:45-19:20

1 stop16h 35m

London Heathrow

Thu 2/7

21:35-08:15

1 stop28h 40m

£955

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Sun 12/7

08:10-07:25

3 stops29h 15m

London Gatwick

Sun 19/7

10:25-19:15

3 stops26h 50m

£995

Ko SamuiLondon

USM - LCY

USMLCY

Ko Samui

Mon 16/11

07:55-19:35

2 stops18h 40m

London City

Thu 3/12

17:50-21:05

2 stops20h 15m

£1,004

Flights are sorted by cheapest return flights first.

Deals found on 29/5

Showing 1-10 of 42 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, Oman Air, and Qatar Airways can get you from Ko Samui to London in just under 21h 55m. Your travel time can differ by up to 11h 50m. 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 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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