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Cheap flights from Ko Samui to London from £245

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 7/5. 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
16:30 - 06:30
USM
-
LGW
21h 00m
2 stops
Multiple Airlines Logo
20:20 - 07:30
LGW
-
USM
28h 10m
2 stops
£723Multiple Airlines
Tue, 10 Mar - Tue, 17 Mar
Multiple Airlines Logo
16:30 - 06:30
USM
-
LGW
21h 00m
2 stops
Multiple Airlines Logo
13:05 - 17:10
LGW
-
USM
45h 05m
3 stops
£798Multiple Airlines
Tue, 10 Mar - Tue, 17 Mar
Multiple Airlines Logo
19:35 - 18:30
USM
-
LGW
29h 55m
1 stop
Multiple Airlines Logo
10:30 - 15:40
LGW
-
USM
22h 10m
2 stops
£845Multiple Airlines
Tue, 10 Mar - Tue, 17 Mar
Multiple Airlines Logo
08:55 - 05:55
USM
-
LGW
28h 00m
2 stops
Multiple Airlines Logo
06:00 - 18:00
LGW
-
USM
30h 00m
3 stops
£856Multiple Airlines
Thu, 26 Mar - Thu, 2 Apr
Qatar Airways Logo
08:15 - 05:55
USM
-
LHR
28h 40m
2 stops
Qatar Airways Logo
15:30 - 18:15
LHR
-
USM
19h 45m
2 stops
£870Qatar Airways
Tue, 10 Mar - Tue, 17 Mar
Oman Air Logo
13:45 - 05:55
USM
-
LHR
23h 10m
2 stops
Oman Air Logo
20:50 - 16:50
LHR
-
USM
38h 00m
2 stops
£889Oman Air
Thu, 26 Mar - Thu, 2 Apr
Oman Air Logo
17:05 - 18:25
USM
-
LHR
32h 20m
2 stops
Oman Air Logo
20:50 - 11:15
LHR
-
USM
32h 25m
2 stops
£905Oman Air
Wed, 25 Mar - Wed, 1 Apr
EVA Air Logo
08:45 - 19:05
USM
-
LHR
17h 20m
1 stop
EVA Air Logo
21:20 - 19:50
LHR
-
USM
15h 30m
1 stop
£916EVA Air
Tue, 10 Mar - Tue, 17 Mar
EVA Air Logo
08:30 - 19:05
USM
-
LHR
17h 35m
1 stop
EVA Air Logo
21:20 - 19:50
LHR
-
USM
15h 30m
1 stop
£944EVA Air
Mon, 9 Mar - Wed, 11 Mar
SWISS Logo
16:25 - 08:45
USM
-
LCY
23h 20m
2 stops
SWISS Logo
19:10 - 21:05
LCY
-
USM
18h 55m
2 stops
£1,395SWISS
Tue, 10 Mar - Tue, 17 Mar

Oman Air flights from Ko Samui to London

Our best Oman Air deals on Ko Samui to London flight tickets
Oman Air
26 Mar
USM13:45Ko Samui
23h 10m
2 stops
LHR05:55London Heathrow
2 Apr
LHR20:50London Heathrow
38h 00m
2 stops
USM16:50Ko Samui
£889
Oman Air
25 Mar
USM17:05Ko Samui
32h 20m
2 stops
LHR18:25London Heathrow
1 Apr
LHR20:50London Heathrow
32h 25m
2 stops
USM11:15Ko Samui
£905
Oman Air
26 Mar
USM15:35Ko Samui
33h 50m
2 stops
LHR18:25London Heathrow
2 Apr
LHR20:50London Heathrow
31h 55m
2 stops
USM10:45Ko Samui
£908

Qatar Airways flights from Ko Samui to London

Our best Qatar Airways deals on Ko Samui to London flight tickets
Qatar Airways
10 Mar
USM08:15Ko Samui
28h 40m
2 stops
LHR05:55London Heathrow
17 Mar
LHR15:30London Heathrow
19h 45m
2 stops
USM18:15Ko Samui
£870
Qatar Airways
9 Mar
USM18:30Ko Samui
25h 05m
2 stops
LGW12:35London Gatwick
11 Mar
LGW08:40London Gatwick
40h 45m
2 stops
USM08:25Ko Samui
£1,013
Qatar Airways
9 Mar
USM18:30Ko Samui
25h 05m
2 stops
LGW12:35London Gatwick
11 Mar
LGW08:40London Gatwick
40h 45m
2 stops
USM08:25Ko Samui
£1,018

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 9 February 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

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Tue 10/3

16:30-06:30

2 stops21h 00m

London Gatwick

Tue 17/3

20:20-07:30

2 stops28h 10m

£723

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Tue 10/3

16:30-06:30

2 stops21h 00m

London Gatwick

Tue 17/3

13:05-17:10

3 stops45h 05m

£798

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Tue 10/3

19:35-18:30

1 stop29h 55m

London Gatwick

Tue 17/3

10:30-15:40

2 stops22h 10m

£845

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Thu 26/3

08:55-05:55

2 stops28h 00m

London Gatwick

Thu 2/4

06:00-18:00

3 stops30h 00m

£856

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 10/3

08:15-05:55

2 stops28h 40m

London Heathrow

Tue 17/3

15:30-18:15

2 stops19h 45m

£870

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 26/3

13:45-05:55

2 stops23h 10m

London Heathrow

Thu 2/4

20:50-16:50

2 stops38h 00m

£889

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 25/3

17:05-18:25

2 stops32h 20m

London Heathrow

Wed 1/4

20:50-11:15

2 stops32h 25m

£905

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 10/3

08:45-19:05

1 stop17h 20m

London Heathrow

Tue 17/3

21:20-19:50

1 stop15h 30m

£916

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 9/3

08:30-19:05

1 stop17h 35m

London Heathrow

Wed 11/3

21:20-19:50

1 stop15h 30m

£944

Ko SamuiLondon

USM - LCY

USMLCY

Ko Samui

Tue 10/3

16:25-08:45

2 stops23h 20m

London City

Tue 17/3

19:10-21:05

2 stops18h 55m

£1,395

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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 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 £507. 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 £622.

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 £548. Flights in the afternoon are often more expensive, with an average ticket price of £611.

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

You could potentially save up to 51% 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 February 2026, prices for Ko Samui to London flights are approximately 13% 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 00m

Direct flights

None
The fastest flight from Ko Samui to London takes 21h 00m
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 21h 00m 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
Slough
Maidstone
Southend-on-Sea
Canterbury
Ipswich
Ilford
Guildford
Chelmsford
Hayes
Wembley
Dover
Folkestone
Colchester
Bedford
Worthing
Ramsgate

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