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Cheap flights from Ko Samui to London from £288

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 15/6. 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.
Multiple Airlines Logo
18:40 - 18:35
USM
-
LHR
30h 55m
2 stops
Multiple Airlines Logo
21:00 - 08:25
LHR
-
USM
28h 25m
2 stops
£785Multiple Airlines
Sun, 8 Mar - Sun, 15 Mar
Multiple Airlines Logo
18:15 - 19:20
USM
-
LHR
32h 05m
2 stops
Multiple Airlines Logo
16:25 - 20:50
LHR
-
USM
21h 25m
3 stops
£833Multiple Airlines
Sat, 7 Mar - Sat, 14 Mar
Multiple Airlines Logo
15:50 - 19:20
USM
-
LHR
34h 30m
2 stops
Multiple Airlines Logo
20:55 - 21:20
LHR
-
USM
17h 25m
2 stops
£873Multiple Airlines
Sat, 7 Mar - Sat, 14 Mar
Multiple Airlines Logo
21:40 - 17:00
USM
-
LHR
26h 20m
2 stops
Multiple Airlines Logo
21:20 - 21:20
LHR
-
USM
17h 00m
1 stop
£880Multiple Airlines
Sun, 8 Mar - Sun, 15 Mar
EVA Air Logo
09:20 - 19:05
USM
-
LHR
16h 45m
1 stop
EVA Air Logo
21:20 - 20:25
LHR
-
USM
16h 05m
1 stop
£942EVA Air
Sun, 8 Mar - Sun, 15 Mar
EVA Air Logo
19:35 - 19:05
USM
-
LHR
30h 30m
1 stop
EVA Air Logo
21:20 - 20:25
LHR
-
USM
16h 05m
1 stop
£967EVA Air
Sat, 7 Mar - Sat, 14 Mar
EVA Air Logo
08:45 - 19:05
USM
-
LHR
17h 20m
1 stop
EVA Air Logo
21:20 - 20:25
LHR
-
USM
16h 05m
1 stop
£972EVA Air
Mon, 9 Mar - Wed, 11 Mar
EVA Air Logo
09:20 - 19:05
USM
-
LHR
16h 45m
1 stop
EVA Air Logo
21:20 - 20:25
LHR
-
USM
16h 05m
1 stop
£977EVA Air
Mon, 9 Mar - Wed, 11 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
£977EVA Air
Mon, 9 Mar - Wed, 11 Mar
Multiple Airlines Logo
08:45 - 19:05
USM
-
LHR
17h 20m
1 stop
Multiple Airlines Logo
19:20 - 07:45
LHR
-
USM
29h 25m
2 stops
£989Multiple Airlines
Sat, 7 Mar - Sat, 14 Mar

EVA Air flights from Ko Samui to London Heathrow Airport

Our best EVA Air deals on Ko Samui to London Heathrow Airport flight tickets
EVA Air
8 Mar
USM09:20Ko Samui
16h 45m
1 stop
LHR19:05London Heathrow
15 Mar
LHR21:20London Heathrow
16h 05m
1 stop
USM20:25Ko Samui
£942
EVA Air
7 Mar
USM19:35Ko Samui
30h 30m
1 stop
LHR19:05London Heathrow
14 Mar
LHR21:20London Heathrow
16h 05m
1 stop
USM20:25Ko Samui
£967
EVA Air
9 Mar
USM08:45Ko Samui
17h 20m
1 stop
LHR19:05London Heathrow
11 Mar
LHR21:20London Heathrow
16h 05m
1 stop
USM20:25Ko Samui
£972

Qatar Airways flights from Ko Samui to London Heathrow Airport

Our best Qatar Airways deals on Ko Samui to London Heathrow Airport flight tickets
Qatar Airways
9 Mar
USM16:30Ko Samui
20h 55m
2 stops
LHR06:25London Heathrow
11 Mar
LHR08:30London Heathrow
19h 10m
2 stops
USM10:40Ko Samui
£1,076
Qatar Airways
9 Mar
USM15:35Ko Samui
21h 50m
2 stops
LHR06:25London Heathrow
11 Mar
LHR08:25London Heathrow
19h 15m
2 stops
USM10:40Ko Samui
£1,077
Qatar Airways
9 Mar
USM15:35Ko Samui
21h 50m
2 stops
LHR06:25London Heathrow
11 Mar
LHR08:05London Heathrow
19h 35m
2 stops
USM10:40Ko Samui
£1,082

momondo Fare Finder

 
Customise your flight search to find flights from Ko Samui to London Heathrow Airport 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 23 January 2026.
Use the filters below to find and compare flights from Ko Samui to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 8/3

18:40-18:35

2 stops30h 55m

London Heathrow

Sun 15/3

21:00-08:25

2 stops28h 25m

£785

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 7/3

18:15-19:20

2 stops32h 05m

London Heathrow

Sat 14/3

16:25-20:50

3 stops21h 25m

£833

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 7/3

15:50-19:20

2 stops34h 30m

London Heathrow

Sat 14/3

20:55-21:20

2 stops17h 25m

£873

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 8/3

21:40-17:00

2 stops26h 20m

London Heathrow

Sun 15/3

21:20-21:20

1 stop17h 00m

£880

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 8/3

09:20-19:05

1 stop16h 45m

London Heathrow

Sun 15/3

21:20-20:25

1 stop16h 05m

£942

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 7/3

19:35-19:05

1 stop30h 30m

London Heathrow

Sat 14/3

21:20-20:25

1 stop16h 05m

£967

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 9/3

08:45-19:05

1 stop17h 20m

London Heathrow

Wed 11/3

21:20-20:25

1 stop16h 05m

£972

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 9/3

09:20-19:05

1 stop16h 45m

London Heathrow

Wed 11/3

21:20-20:25

1 stop16h 05m

£977

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

£977

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 7/3

08:45-19:05

1 stop17h 20m

London Heathrow

Sat 14/3

19:20-07:45

2 stops29h 25m

£989

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 Heathrow Airport

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 Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from Ko Samui is on a Friday. momondo users have found tickets for Friday departures for as low as £513. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Monday is £869.

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

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Ko Samui to London Heathrow Airport in the evening for as low as £540. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £645 on average. Flights to London Heathrow Airport from Ko Samui in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You could potentially save up to 43% on your flight if you consider stops on a Ko Samui to London Heathrow Airport flight.

When to book flights from Ko Samui to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ko Samui to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Ko Samui to London Heathrow Airport (USM to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ko Samui to London Heathrow Airport

Fastest flight time

26h 20m

Direct flights

None
The fastest flight from Ko Samui to London Heathrow Airport takes 26h 20m
There are no direct flights from Ko Samui to London Heathrow Airport. There are no popular flight routes from Ko Samui to London Heathrow Airport.
Search flight deals

  • How far is Ko Samui to London Heathrow by plane?

    The straight-line distance from Ko Samui to London Heathrow is 6145.4 mi. Typically, this will take 26h 20m by plane in normal conditions.

  • When did momondo last update prices for flights from Ko Samui Airport to London Heathrow Airport?

    Prices for flights from Ko Samui Airport to London Heathrow Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Ko Samui Airport to London Heathrow Airport?

    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 Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking 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
Luton
Milton Keynes
Gatwick
Maidstone
Slough
Northampton
Stratford-upon-Avon
Swindon
Southend-on-Sea
Canterbury
Ipswich
Ilford
Poole
Guildford
Chelmsford
Hayes
Swanage
Dover
Bedford

Why use momondo?

Why should I use momondo to find a flight deal from Ko Samui to London?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ko Samui to London. momondo saves you time and could save you money on your trip.

Can I find flights from Ko Samui to London with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to London from Ko Samui with this policy.

How can momondo help me find flights from Ko Samui to London?

Once you have performed a search for Ko Samui to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Ko Samui to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from Ko Samui are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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