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Cheap flights from Ko Samui to London from £259

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 25/11. 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.
Multiple Airlines Logo
21:10 - 18:30USM-LGW
28h 20m1 stop
Multiple Airlines Logo
06:25 - 17:10LGW-USM
51h 45m2 stops
£880Multiple Airlines
Find Deal
Sun, 7 Dec - Sun, 14 Dec
Multiple Airlines Logo
19:10 - 11:40USM-LGW
23h 30m2 stops
Multiple Airlines Logo
13:35 - 15:35LGW-USM
19h 00m2 stops
£1,086Multiple Airlines
Find Deal
Sun, 7 Dec - Sun, 14 Dec
Multiple Airlines Logo
17:40 - 06:25USM-LHR
19h 45m2 stops
Multiple Airlines Logo
16:00 - 16:25LHR-USM
17h 25m2 stops
£1,104Multiple Airlines
Find Deal
Sun, 7 Dec - Sun, 14 Dec
Multiple Airlines Logo
20:30 - 06:40USM-LHR
17h 10m1 stop
Multiple Airlines Logo
22:15 - 08:00LHR-USM
26h 45m2 stops
£1,139Multiple Airlines
Find Deal
Sun, 7 Dec - Sun, 14 Dec
Multiple Airlines Logo
21:10 - 18:30USM-LGW
28h 20m1 stop
Multiple Airlines Logo
16:10 - 15:35LGW-USM
16h 25m1 stop
£1,331Multiple Airlines
Find Deal
Sun, 7 Dec - Sun, 14 Dec
Multiple Airlines Logo
21:10 - 19:05USM-LHR
28h 55m1 stop
Multiple Airlines Logo
21:20 - 21:20LHR-USM
17h 00m1 stop
£1,380Multiple Airlines
Find Deal
Sun, 7 Dec - Sun, 14 Dec
SWISS Logo
10:00 - 08:40USM-LCY
29h 40m2 stops
SWISS Logo
13:20 - 15:35LCY-USM
19h 15m2 stops
£1,574SWISS
Find Deal
Sun, 7 Dec - Sun, 14 Dec

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 October 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 - LGW

USMLGW

Ko Samui

Sun 7/12

21:10-18:30

1 stop28h 20m

London Gatwick

Sun 14/12

06:25-17:10

2 stops51h 45m

£880

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Sun 7/12

19:10-11:40

2 stops23h 30m

London Gatwick

Sun 14/12

13:35-15:35

2 stops19h 00m

£1,086

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 7/12

17:40-06:25

2 stops19h 45m

London Heathrow

Sun 14/12

16:00-16:25

2 stops17h 25m

£1,104

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 7/12

20:30-06:40

1 stop17h 10m

London Heathrow

Sun 14/12

22:15-08:00

2 stops26h 45m

£1,139

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Sun 7/12

21:10-18:30

1 stop28h 20m

London Gatwick

Sun 14/12

16:10-15:35

1 stop16h 25m

£1,331

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 7/12

21:10-19:05

1 stop28h 55m

London Heathrow

Sun 14/12

21:20-21:20

1 stop17h 00m

£1,380

Ko SamuiLondon

USM - LCY

USMLCY

Ko Samui

Sun 7/12

10:00-08:40

2 stops29h 40m

London City

Sun 14/12

13:20-15:35

2 stops19h 15m

£1,574

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 25/11

08:15-06:40

2 stops29h 25m

£259

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 24/11

08:15-23:40

3 stops46h 25m

£262

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Tue 25/11

17:05-05:55

2 stops19h 50m

£393

Flights are sorted by cheapest return flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
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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 £518. 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 £635.

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 £560. Flights in the afternoon are often more expensive, with an average ticket price of £624.

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

As of October 2025, prices for Ko Samui to London flights are approximately 8% 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

Direct flights

None
There are no direct flights from Ko Samui to London. There are no popular flight routes from Ko Samui to London.
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  • 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 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.

  • 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
Canterbury
Southend-on-Sea
Ipswich
Ilford
Guildford
Colchester
Dover
Hayes
Chelmsford
Worthing
Bedford
Dartford
Ramsgate
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