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Cheap flights from Ko Samui to London from £275

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
17:55 - 12:40USM  Ko Samui-LGW London Gatwick
24h 45m3 stops Phuket City Abu Dhabi Zayed Intl Dublin
Multiple Airlines Logo
13:50 - 20:25LGW  London Gatwick-USM Ko Samui
24h 35m3 stops Václav Havel Prague Sharjah Phuket City
£659Multiple Airlines
Mon, 12 Oct - Mon, 19 Oct
Multiple Airlines Logo
17:55 - 12:40USM  Ko Samui-LGW London Gatwick
24h 45m3 stops Phuket City Abu Dhabi Zayed Intl Dublin
Multiple Airlines Logo
13:50 - 20:25LGW  London Gatwick-USM Ko Samui
24h 35m3 stops Václav Havel Prague Sharjah Phuket City
£664Multiple Airlines
Mon, 12 Oct - Mon, 19 Oct
Multiple Airlines Logo
11:05 - 06:35USM  Ko Samui-LGW London Gatwick
25h 30m2 stops Singapore Changi Beijing Capital
Multiple Airlines Logo
13:50 - 20:25LGW  London Gatwick-USM Ko Samui
24h 35m3 stops Václav Havel Prague Sharjah Phuket City
£667Multiple Airlines
Mon, 12 Oct - Mon, 19 Oct
Multiple Airlines Logo
19:45 - 15:00USM  Ko Samui-LGW London Gatwick
25h 15m2 stops Singapore Changi Shanghai Pu Dong
Multiple Airlines Logo
13:50 - 21:35LGW  London Gatwick-USM Ko Samui
25h 45m3 stops Václav Havel Prague Sharjah Bangkok Suvarnabhumi
£670Multiple Airlines
Mon, 12 Oct - Mon, 19 Oct
Multiple Airlines Logo
08:40 - 06:55USM  Ko Samui-LHR London Heathrow
28h 15m2 stops Singapore Changi Manama Bahrain Intl
Multiple Airlines Logo
10:00 - 18:50LHR  London Heathrow-USM Ko Samui
26h 50m2 stops Manama Bahrain Intl Singapore Changi
£730Multiple Airlines
Mon, 12 Oct - Mon, 19 Oct
Multiple Airlines Logo
17:55 - 11:30USM  Ko Samui-LGW London Gatwick
23h 35m3 stops Phuket City Abu Dhabi Zayed Intl Milan Malpensa
Multiple Airlines Logo
13:35 - 20:25LGW  London Gatwick-USM Ko Samui
24h 50m3 stops Athens Eleftherios V. Sharjah Phuket City
£735Multiple Airlines
Tue, 29 Sep - Tue, 6 Oct
Multiple Airlines Logo
11:25 - 07:00USM  Ko Samui-LHR London Heathrow
25h 35m2 stops Phuket City Abu Dhabi Zayed Intl
Multiple Airlines Logo
13:50 - 18:30LHR  London Heathrow-USM Ko Samui
22h 40m2 stops Mumbai Chhatrapati Shivaji Intl Bangkok Suvarnabhumi
£736Multiple Airlines
Thu, 24 Sep - Thu, 8 Oct
Multiple Airlines Logo
17:50 - 18:45USM  Ko Samui-LGW London Gatwick
30h 55m2 stops Bangkok Suvarnabhumi Frankfurt am Main
Multiple Airlines Logo
10:20 - 20:50LGW  London Gatwick-USM Ko Samui
28h 30m2 stops Frankfurt am Main Bangkok Suvarnabhumi
£738Multiple Airlines
Wed, 23 Sep - Wed, 7 Oct
Multiple Airlines Logo
08:40 - 07:00USM  Ko Samui-LHR London Heathrow
28h 20m3 stops Singapore Changi Kuala Lumpur Intl Abu Dhabi Zayed Intl
Multiple Airlines Logo
21:45 - 10:10LHR  London Heathrow-USM Ko Samui
30h 25m3 stops Abu Dhabi Zayed Intl Kuala Lumpur Intl Singapore Changi
£741Multiple Airlines
Mon, 12 Oct - Mon, 19 Oct
Multiple Airlines Logo
15:25 - 08:45USM  Ko Samui-LGW London Gatwick
23h 20m2 stops Phuket City Sharjah
Multiple Airlines Logo
14:35 - 20:25LGW  London Gatwick-USM Ko Samui
23h 50m3 stops Athens Eleftherios V. Sharjah Phuket City
£743Multiple Airlines
Tue, 29 Sep - Tue, 6 Oct

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Oman Air flights from Ko Samui to London

Our best Oman Air deals on Ko Samui to London flight tickets
Oman Air
15 Sept
USM11:45Ko Samui
37h 25m
2 stops
LHR19:10London Heathrow
6 Oct
LHR20:50London Heathrow
33h 05m
2 stops
USM11:55Ko Samui
£836
Oman Air
15 Sept
USM15:25Ko Samui
33h 45m
2 stops
LHR19:10London Heathrow
6 Oct
LHR20:50London Heathrow
31h 40m
2 stops
USM10:30Ko Samui
£876

Cathay Pacific flights from Ko Samui to London

Our best Cathay Pacific deals on Ko Samui to London flight tickets
Cathay Pacific
6 Sept
USM11:55Ko Samui
33h 20m
1 stop
LHR15:15London Heathrow
9 Sept
LHR20:15London Heathrow
30h 00m
2 stops
USM08:15Ko Samui
£1,725
Cathay Pacific
15 Sept
USM08:45Ko Samui
26h 55m
2 stops
LHR05:40London Heathrow
6 Oct
LHR18:20London Heathrow
19h 20m
1 stop
USM19:40Ko Samui
£1,810
Cathay Pacific
15 Sept
USM08:45Ko Samui
26h 55m
2 stops
LHR05:40London Heathrow
6 Oct
LHR18:20London Heathrow
19h 20m
1 stop
USM19:40Ko Samui
£1,919

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

Return

Price

Cheapest return flight

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Mon 12/10

17:55-12:40

3 stops24h 45m

London Gatwick

Mon 19/10

13:50-20:25

3 stops24h 35m

£659

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Mon 12/10

17:55-12:40

3 stops24h 45m

London Gatwick

Mon 19/10

13:50-20:25

3 stops24h 35m

£664

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Mon 12/10

11:05-06:35

2 stops25h 30m

London Gatwick

Mon 19/10

13:50-20:25

3 stops24h 35m

£667

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Mon 12/10

19:45-15:00

2 stops25h 15m

London Gatwick

Mon 19/10

13:50-21:35

3 stops25h 45m

£670

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Mon 12/10

08:40-06:55

2 stops28h 15m

London Heathrow

Mon 19/10

10:00-18:50

2 stops26h 50m

£730

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Tue 29/9

17:55-11:30

3 stops23h 35m

London Gatwick

Tue 6/10

13:35-20:25

3 stops24h 50m

£735

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Thu 24/9

11:25-07:00

2 stops25h 35m

London Heathrow

Thu 8/10

13:50-18:30

2 stops22h 40m

£736

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Wed 23/9

17:50-18:45

2 stops30h 55m

London Gatwick

Wed 7/10

10:20-20:50

2 stops28h 30m

£738

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Mon 12/10

08:40-07:00

3 stops28h 20m

London Heathrow

Mon 19/10

21:45-10:10

3 stops30h 25m

£741
Fastest return journey

Ko SamuiLondon

USM Ko Samui - LGW London Gatwick

USMLGW

Ko Samui

Tue 29/9

15:25-08:45

2 stops23h 20m

London Gatwick

Tue 6/10

14:35-20:25

3 stops23h 50m

£743

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

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 month to fly to London?

The cheapest month to fly to London from Ko Samui is in November. Flight prices, which tend to average around £0, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from Ko Samui averaging around £0.

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 September 2026, prices for Ko Samui to London flights are approximately 14% 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

Best price found

£275

Fastest flight time

23h 35m

Direct flights

None
The best one-way flight to London from Ko Samui in the past 72 hours is £275. The best return flight deal from Ko Samui to London found on momondo in the last 72 hours is £659.
The fastest flight from Ko Samui to London takes 23h 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

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 23h 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.

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
Slough
Ipswich
Maidstone
Folkestone
Hastings
Ilford
Canterbury
Chichester
Hayes
Bedford
Guildford
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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