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Cheap flights from Ko Samui to London from £240

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 26/10. 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
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
17:25 - 06:55
USM
-
LHR
19h 30m
2 stops
Multiple Airlines Logo
20:50 - 07:10
LHR
-
USM
28h 20m
2 stops
£768Multiple Airlines
Tue, 15 Sep - Tue, 6 Oct
Multiple Airlines Logo
08:40 - 07:25
USM
-
LGW
28h 45m
3 stops
Multiple Airlines Logo
10:25 - 18:50
LGW
-
USM
26h 25m
3 stops
£786Multiple Airlines
Sun, 5 Jul - Sun, 12 Jul
Multiple Airlines Logo
08:40 - 07:25
USM
-
LGW
28h 45m
3 stops
Multiple Airlines Logo
10:25 - 18:50
LGW
-
USM
26h 25m
3 stops
£803Multiple Airlines
Fri, 3 Jul - Fri, 10 Jul
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
£818Gulf Air
Tue, 15 Sep - Tue, 6 Oct
Gulf Air Logo
15:25 - 06:55
USM
-
LHR
21h 30m
2 stops
Gulf Air Logo
22:05 - 16:50
LHR
-
USM
36h 45m
2 stops
£819Gulf Air
Tue, 15 Sep - Tue, 6 Oct
Qatar Airways Logo
14:30 - 07:20
USM
-
LGW
22h 50m
2 stops
Qatar Airways Logo
09:05 - 20:25
LGW
-
USM
29h 20m
2 stops
£875Qatar Airways
Mon, 8 Jun - Thu, 11 Jun
Qatar Airways Logo
14:30 - 07:20
USM
-
LGW
22h 50m
2 stops
Qatar Airways Logo
09:05 - 20:25
LGW
-
USM
29h 20m
2 stops
£876Qatar Airways
Mon, 8 Jun - Thu, 11 Jun
Oman Air Logo
15:20 - 06:30
USM
-
LHR
21h 10m
2 stops
Oman Air Logo
20:50 - 13:45
LHR
-
USM
34h 55m
2 stops
£881Oman Air
Sun, 5 Jul - Sun, 12 Jul
Oman Air Logo
15:25 - 19:10
USM
-
LHR
33h 45m
2 stops
Oman Air Logo
20:50 - 20:50
LHR
-
USM
18h 00m
2 stops
£882Oman Air
Mon, 8 Jun - Thu, 11 Jun
Emirates Logo
16:25 - 12:35
USM
-
LGW
26h 10m
2 stops
Emirates Logo
14:35 - 18:00
LGW
-
USM
21h 25m
2 stops
£944Emirates
Fri, 5 Jun - Sun, 14 Jun

EVA Air flights from Ko Samui to London

Our best EVA Air deals on Ko Samui to London flight tickets
EVA Air
9 Jun
USM06:00Ko Samui
19h 20m
1 stop
LHR19:20London Heathrow
11 Jun
LHR21:35London Heathrow
16h 55m
1 stop
USM20:30Ko Samui
£993
EVA Air
8 Jun
USM21:00Ko Samui
28h 20m
1 stop
LHR19:20London Heathrow
11 Jun
LHR21:35London Heathrow
14h 55m
1 stop
USM18:30Ko Samui
£1,045
EVA Air
8 Jun
USM21:00Ko Samui
28h 20m
1 stop
LHR19:20London Heathrow
11 Jun
LHR21:35London Heathrow
14h 55m
1 stop
USM18:30Ko Samui
£1,046

Oman Air flights from Ko Samui to London

Our best Oman Air deals on Ko Samui to London flight tickets
Oman Air
5 Jul
USM15:20Ko Samui
21h 10m
2 stops
LHR06:30London Heathrow
12 Jul
LHR20:50London Heathrow
34h 55m
2 stops
USM13:45Ko Samui
£881
Oman Air
8 Jun
USM15:25Ko Samui
33h 45m
2 stops
LHR19:10London Heathrow
11 Jun
LHR20:50London Heathrow
18h 00m
2 stops
USM20:50Ko Samui
£882
Oman Air
4 Jul
USM15:50Ko Samui
20h 40m
2 stops
LHR06:30London Heathrow
11 Jul
LHR08:25London Heathrow
20h 20m
2 stops
USM10:45Ko Samui
£910

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 24 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

Tue 15/9

17:25-06:55

2 stops19h 30m

London Heathrow

Tue 6/10

20:50-07:10

2 stops28h 20m

£768

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Sun 5/7

08:40-07:25

3 stops28h 45m

London Gatwick

Sun 12/7

10:25-18:50

3 stops26h 25m

£786

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Fri 3/7

08:40-07:25

3 stops28h 45m

London Gatwick

Fri 10/7

10:25-18:50

3 stops26h 25m

£803

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

£818

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 15/9

15:25-06:55

2 stops21h 30m

London Heathrow

Tue 6/10

22:05-16:50

2 stops36h 45m

£819

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 8/6

14:30-07:20

2 stops22h 50m

London Gatwick

Thu 11/6

09:05-20:25

2 stops29h 20m

£875

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 8/6

14:30-07:20

2 stops22h 50m

London Gatwick

Thu 11/6

09:05-20:25

2 stops29h 20m

£876

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 5/7

15:20-06:30

2 stops21h 10m

London Heathrow

Sun 12/7

20:50-13:45

2 stops34h 55m

£881

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 8/6

15:25-19:10

2 stops33h 45m

London Heathrow

Thu 11/6

20:50-20:50

2 stops18h 00m

£882
Fastest return journey

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Fri 5/6

16:25-12:35

2 stops26h 10m

London Gatwick

Sun 14/6

14:35-18:00

2 stops21h 25m

£944

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 3% 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 May 2026, prices for Ko Samui to London flights are approximately 43% more expensive 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

21h 10m

Direct flights

None
The fastest flight from Ko Samui to London takes 21h 10m
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 21h 10m 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
Milton Keynes
Gatwick
Luton
Wembley
Slough
Maidstone
Southend-on-Sea
Ipswich
Canterbury
Ilford
Hayes
Guildford
Folkestone
Chelmsford
Bedford
Dover
Harlow
Chichester
Colchester

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