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Cheap flights from Ko Samui to London from £274

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 4/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
Emirates Logo
16:25 - 07:05
USM
-
LHR
20h 40m2 stops
Emirates Logo
14:25 - 21:10
LHR
-
USM
24h 45m2 stops
£897Emirates
Sun, 7 Jun - Wed, 10 Jun
EVA Air Logo
07:50 - 19:20
USM
-
LHR
17h 30m1 stop
EVA Air Logo
21:35 - 20:30
LHR
-
USM
16h 55m1 stop
£941EVA Air
Sun, 7 Jun - Wed, 10 Jun
EVA Air Logo
08:30 - 19:05
USM
-
LHR
17h 35m1 stop
EVA Air Logo
21:20 - 19:50
LHR
-
USM
15h 30m1 stop
£975EVA Air
Wed, 11 Mar - Sun, 15 Mar
EVA Air Logo
07:15 - 19:05
USM
-
LHR
18h 50m1 stop
EVA Air Logo
21:20 - 19:50
LHR
-
USM
15h 30m1 stop
£976EVA Air
Wed, 11 Mar - Sun, 15 Mar
Qatar Airways Logo
11:40 - 05:55
USM
-
LGW
25h 15m2 stops
Qatar Airways Logo
08:40 - 17:30
LGW
-
USM
25h 50m2 stops
£981Qatar Airways
Wed, 11 Mar - Sun, 15 Mar
British Airways Logo
18:30 - 05:30
USM
-
LGW
18h 00m1 stop
British Airways Logo
21:15 - 20:25
LGW
-
USM
16h 10m1 stop
£988British Airways
Wed, 11 Mar - Sun, 15 Mar
Qatar Airways Logo
11:40 - 06:25
USM
-
LHR
25h 45m2 stops
Qatar Airways Logo
08:40 - 18:15
LHR
-
USM
26h 35m2 stops
£1,014Qatar Airways
Wed, 11 Mar - Sun, 15 Mar
British Airways Logo
13:30 - 05:25
USM
-
LHR
21h 55m2 stops
British Airways Logo
19:25 - 18:15
LHR
-
USM
16h 50m1 stop
£1,080British Airways
Sun, 7 Jun - Wed, 10 Jun
Singapore Airlines Logo
18:15 - 06:25
USM
-
LGW
18h 10m1 stop
Singapore Airlines Logo
10:15 - 17:20
LGW
-
USM
25h 05m1 stop
£1,225Singapore Airlines
Mon, 8 Jun - Wed, 10 Jun
Multiple Airlines Logo
20:40 - 09:05
USM
-
LCY
19h 25m2 stops
Multiple Airlines Logo
09:50 - 16:25
LCY
-
USM
23h 35m2 stops
£1,238Multiple Airlines
Wed, 4 Feb - Wed, 11 Feb

EVA Air flights from Ko Samui to London

Our best EVA Air deals on Ko Samui to London flight tickets
EVA Air
7 Jun
USM07:50Ko Samui
17h 30m
1 stop
LHR19:20London Heathrow
10 Jun
LHR21:35London Heathrow
16h 55m
1 stop
USM20:30Ko Samui
£941
Find similar
EVA Air
11 Mar
USM08:30Ko Samui
17h 35m
1 stop
LHR19:05London Heathrow
15 Mar
LHR21:20London Heathrow
15h 30m
1 stop
USM19:50Ko Samui
£975
Find similar
EVA Air
11 Mar
USM07:15Ko Samui
18h 50m
1 stop
LHR19:05London Heathrow
15 Mar
LHR21:20London Heathrow
15h 30m
1 stop
USM19:50Ko Samui
£976
Find similar

Qatar Airways flights from Ko Samui to London

Our best Qatar Airways deals on Ko Samui to London flight tickets
Qatar Airways
11 Mar
USM11:40Ko Samui
25h 15m
2 stops
LGW05:55London Gatwick
15 Mar
LGW08:40London Gatwick
25h 50m
2 stops
USM17:30Ko Samui
£981
Find similar
Qatar Airways
11 Mar
USM11:40Ko Samui
25h 45m
2 stops
LHR06:25London Heathrow
15 Mar
LHR08:40London Heathrow
26h 35m
2 stops
USM18:15Ko Samui
£1,014
Find similar
Qatar Airways
11 Mar
USM11:40Ko Samui
25h 45m
2 stops
LHR06:25London Heathrow
15 Mar
LHR08:40London Heathrow
26h 35m
2 stops
USM18:15Ko Samui
£1,016
Find similar

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 21 December 2025.
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

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 7/6

16:25-07:05

2 stops20h 40m

London Heathrow

Wed 10/6

14:25-21:10

2 stops24h 45m

£897

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 7/6

07:50-19:20

1 stop17h 30m

London Heathrow

Wed 10/6

21:35-20:30

1 stop16h 55m

£941

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 11/3

08:30-19:05

1 stop17h 35m

London Heathrow

Sun 15/3

21:20-19:50

1 stop15h 30m

£975

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 11/3

07:15-19:05

1 stop18h 50m

London Heathrow

Sun 15/3

21:20-19:50

1 stop15h 30m

£976

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Wed 11/3

11:40-05:55

2 stops25h 15m

London Gatwick

Sun 15/3

08:40-17:30

2 stops25h 50m

£981

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Wed 11/3

18:30-05:30

1 stop18h 00m

London Gatwick

Sun 15/3

21:15-20:25

1 stop16h 10m

£988

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 11/3

11:40-06:25

2 stops25h 45m

London Heathrow

Sun 15/3

08:40-18:15

2 stops26h 35m

£1,014

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 7/6

13:30-05:25

2 stops21h 55m

London Heathrow

Wed 10/6

19:25-18:15

1 stop16h 50m

£1,080

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 8/6

18:15-06:25

1 stop18h 10m

London Gatwick

Wed 10/6

10:15-17:20

1 stop25h 05m

£1,225

Ko SamuiLondon

USM - LCY

USMLCY

Ko Samui

Wed 4/2

20:40-09:05

2 stops19h 25m

London City

Wed 11/2

09:50-16:25

2 stops23h 35m

£1,238

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

What is the cheapest day to depart on your flight to London?

Our data shows that Friday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £516. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Ko Samui to London for around £633.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is in the morning when flights can be purchased for as low as £558. Flights in the afternoon are often more expensive, with an average ticket price of £622.

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

You could potentially save up to 40% 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 December 2025, prices for Ko Samui to London flights are approximately 26% 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

17h 35m

Direct flights

None
The fastest flight from Ko Samui to London takes 17h 35m
There are no direct flights from Ko Samui to London. There are no popular flight routes from Ko Samui to London.
Search flight deals

  • 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 17h 35m 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.

  • What is the most popular airline from Ko Samui to London?

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Gatwick
Maidstone
Slough
Southend-on-Sea
Canterbury
Ipswich
Ilford
Guildford
Hayes
Chelmsford
Dover
Worthing
Colchester
Bedford
Ramsgate
Hounslow
Stansted

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