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Cheap flights from Ko Samui to London from £265

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Ko Samui to London

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
08:15 - 17:55USM  Ko Samui-LGW London Gatwick
16h 40m1 stop Phuket City
Multiple Airlines Logo
10:30 - 21:20LGW  London Gatwick-USM Ko Samui
27h 50m2 stops Shanghai Pu Dong Bangkok Suvarnabhumi
£621Multiple Airlines
Thu, 24 Dec - Thu, 7 Jan
Multiple Airlines Logo
08:15 - 17:55USM  Ko Samui-LGW London Gatwick
16h 40m1 stop Phuket City
Multiple Airlines Logo
19:10 - 08:25LGW  London Gatwick-USM Ko Samui
30h 15m2 stops Chengdu Tianfu Intl Phuket City
£630Multiple Airlines
Thu, 24 Dec - Wed, 6 Jan
Multiple Airlines Logo
08:15 - 17:55USM  Ko Samui-LGW London Gatwick
16h 40m1 stop Phuket City
Multiple Airlines Logo
19:10 - 08:25LGW  London Gatwick-USM Ko Samui
30h 15m2 stops Chengdu Tianfu Intl Phuket City
£632Multiple Airlines
Thu, 24 Dec - Fri, 8 Jan
Multiple Airlines Logo
07:00 - 21:05USM  Ko Samui-LGW London Gatwick
21h 05m1 stop Bangkok Suvarnabhumi
Multiple Airlines Logo
09:50 - 17:00LGW  London Gatwick-USM Ko Samui
24h 10m2 stops Guangzhou Baiyun Bangkok Suvarnabhumi
£638Multiple Airlines
Thu, 17 Dec - Sat, 16 Jan
Multiple Airlines Logo
08:15 - 17:55USM  Ko Samui-LGW London Gatwick
16h 40m1 stop Phuket City
Multiple Airlines Logo
09:50 - 08:25LGW  London Gatwick-USM Ko Samui
15h 35m1 stop Phuket City
£644Multiple Airlines
Thu, 24 Dec - Wed, 6 Jan
Multiple Airlines Logo
18:15 - 21:25USM  Ko Samui-LGW London Gatwick
34h 10m1 stop Phuket City
Multiple Airlines Logo
09:50 - 08:25LGW  London Gatwick-USM Ko Samui
15h 35m1 stop Phuket City
£645Multiple Airlines
Mon, 21 Dec - Wed, 6 Jan
Multiple Airlines Logo
08:15 - 21:25USM  Ko Samui-LGW London Gatwick
20h 10m1 stop Phuket City
Multiple Airlines Logo
10:30 - 21:20LGW  London Gatwick-USM Ko Samui
27h 50m2 stops Shanghai Pu Dong Bangkok Suvarnabhumi
£654Multiple Airlines
Tue, 22 Dec - Thu, 7 Jan
Multiple Airlines Logo
08:15 - 21:25USM  Ko Samui-LGW London Gatwick
20h 10m1 stop Phuket City
Multiple Airlines Logo
19:10 - 08:25LGW  London Gatwick-USM Ko Samui
30h 15m2 stops Chengdu Tianfu Intl Phuket City
£662Multiple Airlines
Tue, 22 Dec - Wed, 6 Jan
Multiple Airlines Logo
08:15 - 21:25USM  Ko Samui-LGW London Gatwick
20h 10m1 stop Phuket City
Multiple Airlines Logo
09:50 - 08:25LGW  London Gatwick-USM Ko Samui
15h 35m1 stop Phuket City
£670Multiple Airlines
Tue, 22 Dec - Wed, 6 Jan
Multiple Airlines Logo
16:30 - 11:05USM  Ko Samui-LHR London Heathrow
25h 35m2 stops Bangkok Suvarnabhumi Mumbai Chhatrapati Shivaji Intl
Multiple Airlines Logo
21:05 - 07:45LHR  London Heathrow-USM Ko Samui
27h 40m2 stops New Delhi Indira Gandhi Intl Bangkok Suvarnabhumi
£677Multiple Airlines
Mon, 30 Nov - Mon, 7 Dec

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Etihad Airways flights from Ko Samui to London

Our best Etihad Airways deals on Ko Samui to London flight tickets
Etihad Airways
5 Nov
USM21:10Ko Samui
21h 55m
2 stops
LHR12:05London Heathrow
9 Nov
LHR13:55London Heathrow
20h 35m
2 stops
USM17:30Ko Samui
£882
Etihad Airways
5 Nov
USM14:05Ko Samui
23h 35m
2 stops
LHR06:40London Heathrow
9 Nov
LHR13:55London Heathrow
21h 30m
2 stops
USM18:25Ko Samui
£885
Etihad Airways
5 Nov
USM14:05Ko Samui
23h 35m
2 stops
LHR06:40London Heathrow
9 Nov
LHR13:55London Heathrow
21h 30m
2 stops
USM18:25Ko Samui
£887

EVA Air flights from Ko Samui to London

Our best EVA Air deals on Ko Samui to London flight tickets
EVA Air
5 Nov
USM07:00Ko Samui
19h 05m
1 stop
LHR19:05London Heathrow
9 Nov
LHR21:20London Heathrow
15h 30m
1 stop
USM19:50Ko Samui
£1,005
EVA Air
5 Nov
USM07:55Ko Samui
18h 10m
1 stop
LHR19:05London Heathrow
9 Nov
LHR21:20London Heathrow
16h 05m
1 stop
USM20:25Ko Samui
£1,008
EVA Air
5 Nov
USM07:00Ko Samui
19h 05m
1 stop
LHR19:05London Heathrow
9 Nov
LHR21:20London Heathrow
15h 30m
1 stop
USM19:50Ko Samui
£1,011

momondo Fare Finder

 
Use the filters below to find and compare flights from Ko Samui to London that are best for you.

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Route

Depart

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Price

Cheapest return flight

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Thu 24/12

08:15-17:55

1 stop16h 40m

London Gatwick

Thu 7/1

10:30-21:20

2 stops27h 50m

£621

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Thu 24/12

08:15-17:55

1 stop16h 40m

London Gatwick

Wed 6/1

19:10-08:25

2 stops30h 15m

£630

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Thu 24/12

08:15-17:55

1 stop16h 40m

London Gatwick

Fri 8/1

19:10-08:25

2 stops30h 15m

£632

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Thu 17/12

07:00-21:05

1 stop21h 05m

London Gatwick

Sat 16/1

09:50-17:00

2 stops24h 10m

£638
Fastest return journey

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Thu 24/12

08:15-17:55

1 stop16h 40m

London Gatwick

Wed 6/1

09:50-08:25

1 stop15h 35m

£644

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Mon 21/12

18:15-21:25

1 stop34h 10m

London Gatwick

Wed 6/1

09:50-08:25

1 stop15h 35m

£645

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Tue 22/12

08:15-21:25

1 stop20h 10m

London Gatwick

Thu 7/1

10:30-21:20

2 stops27h 50m

£654

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Tue 22/12

08:15-21:25

1 stop20h 10m

London Gatwick

Wed 6/1

19:10-08:25

2 stops30h 15m

£662

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Tue 22/12

08:15-21:25

1 stop20h 10m

London Gatwick

Wed 6/1

09:50-08:25

1 stop15h 35m

£670

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Mon 30/11

16:30-11:05

2 stops25h 35m

London Heathrow

Mon 7/12

21:05-07:45

2 stops27h 40m

£677

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 19% 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 October 2026, prices for Ko Samui to London flights are approximately 10% 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

Best price found

£265

Fastest flight time

18h 40m

Direct flights

None
The best one-way flight to London from Ko Samui in the past 72 hours is £265. The best return flight deal from Ko Samui to London found on momondo in the last 72 hours is £621.
The fastest flight from Ko Samui to London takes 18h 40m
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 40m 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
Southend-on-Sea
Luton
Ipswich
Slough
Maidstone
Folkestone
Hastings
Ilford
Canterbury
Chichester
Colchester
Guildford
Hayes
Bedford
Worthing
Winchester

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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