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Cheap flights from Ko Samui to London from £296

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ko Samui to London departing on 26/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags
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Find the cheapest flights from Ko Samui to London

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
18:15 - 21:30
USM
-
LGW
33h 15m
2 stops
Multiple Airlines Logo
11:10 - 07:45
LGW
-
USM
38h 35m
3 stops
£757Multiple Airlines
Thu, 20 Aug - Sun, 23 Aug
Multiple Airlines Logo
18:15 - 18:40
USM
-
LHR
30h 25m
2 stops
Multiple Airlines Logo
22:15 - 07:45
LHR
-
USM
27h 30m
2 stops
£775Multiple Airlines
Tue, 18 Aug - Tue, 25 Aug
Gulf Air Logo
15:50 - 06:55
USM
-
LHR
21h 05m
2 stops
Gulf Air Logo
10:00 - 15:10
LHR
-
USM
23h 10m
2 stops
£793Gulf Air
Tue, 15 Sep - Tue, 6 Oct
Gulf Air Logo
15:50 - 06:55
USM
-
LHR
21h 05m
2 stops
Gulf Air Logo
22:05 - 13:45
LHR
-
USM
33h 40m
2 stops
£840Gulf Air
Tue, 15 Sep - Tue, 6 Oct
Emirates Logo
16:25 - 07:05
USM
-
LHR
20h 40m
2 stops
Emirates Logo
09:05 - 21:10
LHR
-
USM
30h 05m
2 stops
£913Emirates
Sun, 13 Sep - Wed, 16 Sep
Qatar Airways Logo
17:55 - 06:40
USM
-
LGW
42h 45m
2 stops
Qatar Airways Logo
09:00 - 16:55
LGW
-
USM
25h 55m
2 stops
£915Qatar Airways
Tue, 15 Sep - Sat, 19 Sep
Qatar Airways Logo
17:55 - 06:40
USM
-
LGW
42h 45m
2 stops
Qatar Airways Logo
09:00 - 16:55
LGW
-
USM
25h 55m
2 stops
£916Qatar Airways
Tue, 15 Sep - Sat, 19 Sep
Emirates Logo
16:25 - 07:05
USM
-
LHR
20h 40m
2 stops
Emirates Logo
09:05 - 21:10
LHR
-
USM
30h 05m
2 stops
£919Emirates
Sun, 13 Sep - Wed, 16 Sep
SWISS Logo
16:25 - 08:40
USM
-
LCY
22h 15m
2 stops
SWISS Logo
18:00 - 21:10
LCY
-
USM
21h 10m
2 stops
£1,375SWISS
Thu, 6 Aug - Thu, 13 Aug
SWISS Logo
16:25 - 08:40
USM
-
LCY
22h 15m
2 stops
SWISS Logo
18:00 - 21:10
LCY
-
USM
21h 10m
2 stops
£1,605SWISS
Thu, 20 Aug - Sun, 23 Aug

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Gulf Air flights from Ko Samui to London

Our best Gulf Air deals on Ko Samui to London flight tickets
Gulf Air
15 Sept
USM15:50Ko Samui
21h 05m
2 stops
LHR06:55London Heathrow
6 Oct
LHR10:00London Heathrow
23h 10m
2 stops
USM15:10Ko Samui
£793
Gulf Air
15 Sept
USM15:50Ko Samui
21h 05m
2 stops
LHR06:55London Heathrow
6 Oct
LHR22:05London Heathrow
33h 40m
2 stops
USM13:45Ko Samui
£840
Gulf Air
15 Sept
USM15:50Ko Samui
21h 05m
2 stops
LHR06:55London Heathrow
6 Oct
LHR22:05London Heathrow
33h 40m
2 stops
USM13:45Ko Samui
£842

Thai Airways flights from Ko Samui to London

Our best Thai Airways deals on Ko Samui to London flight tickets
Thai Airways
15 Sept
USM07:50Ko Samui
17h 25m
1 stop
LHR19:15London Heathrow
6 Oct
LHR12:30London Heathrow
14h 05m
1 stop
USM08:35Ko Samui
£1,077
Thai Airways
15 Sept
USM15:20Ko Samui
21h 55m
1 stop
LHR07:15London Heathrow
6 Oct
LHR21:25London Heathrow
14h 20m
1 stop
USM17:45Ko Samui
£1,079
Thai Airways
19 Jul
USM20:35Ko Samui
28h 40m
1 stop
LHR19:15London Heathrow
11 Aug
LHR21:25London Heathrow
18h 10m
1 stop
USM21:35Ko Samui
£1,096

momondo 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, momondo users made 279,928 searches. Data last updated 9 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

£757

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 18/8

18:15-18:40

2 stops30h 25m

London Heathrow

Tue 25/8

22:15-07:45

2 stops27h 30m

£775

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

£793

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

£840

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

£913

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

£915

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

£916

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

£919
Fastest return journey

Ko SamuiLondon

USM - LCY

USMLCY

Ko Samui

Thu 6/8

16:25-08:40

2 stops22h 15m

London City

Thu 13/8

18:00-21:10

2 stops21h 10m

£1,375

Ko SamuiLondon

USM - LCY

USMLCY

Ko Samui

Thu 20/8

16:25-08:40

2 stops22h 15m

London City

Sun 23/8

18:00-21:10

2 stops21h 10m

£1,605

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Ko Samui to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Can stopping save me money on Ko Samui to London flights?

You could potentially save up to 29% on your flight if you consider stops on a Ko Samui to London flight.

How have Ko Samui to London flight prices changed over time?

As of July 2026, prices for Ko Samui to London flights are approximately 11% cheaper when compared to flights at the same time last year.

When to book flights from Ko Samui to London

Are you open to changing your travel dates? Check out the ideal times to fly from Ko Samui to London according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Ko Samui to London (USM to LON) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ko Samui to London

Fastest flight time

18h 55m

Direct flights

None
The fastest flight from Ko Samui to London takes 18h 55m
There are no direct flights from Ko Samui to London. There are no popular flight routes from Ko Samui to London.
Search flight deals

Frequently asked questions about flying from Ko Samui to London

  • How far is Ko Samui to London by plane?

    The straight-line distance from Ko Samui to London is 6131.1 mi. Typically, this will take 18h 55m by plane in normal conditions.

  • When did momondo last update prices for flights from Ko Samui Airport to London?

    Prices for flights from Ko Samui Airport to London are refreshed on a daily basis.

  • How old do you have to be to fly from Ko Samui Airport to London?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ko Samui Airport to London.

  • What documentation or ID do you need to fly to London?

    The travel and health documents you'll need for your trip to London may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Wembley
Gatwick
Milton Keynes
Luton
Southend-on-Sea
Slough
Maidstone
Ipswich
Ilford
Folkestone
Canterbury
Guildford
Hayes
Hastings
Chichester
Bedford
Colchester
Harlow
Chelmsford

Why use momondo?

Why should I use momondo to find a flight deal from Ko Samui to London?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ko Samui to London . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Ko Samui to London with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ko Samui to London flights to just show those with flexible booking policies.

How can momondo help me find flights from Ko Samui to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ko Samui to London.

I’m not ready to book a flight from Ko Samui to London right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Ko Samui to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London
London City Airport
London Gatwick Airport
London Heathrow Airport
London Luton Airport
London Southend Airport
London Stansted Airport