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Cheap flights from Ko Samui to London from £306

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
21:10 - 17:00
USM
-
LHR
26h 50m2 stops
Multiple Airlines Logo
21:00 - 08:25
LHR
-
USM
28h 25m2 stops
£719Multiple Airlines
søn., 18 jan. - søn., 25 jan.
Multiple Airlines Logo
20:40 - 17:00
USM
-
LHR
27h 20m2 stops
Multiple Airlines Logo
14:05 - 08:00
LHR
-
USM
34h 55m3 stops
£746Multiple Airlines
søn., 18 jan. - søn., 25 jan.
Lufthansa Logo
13:25 - 08:45
USM
-
LHR
26h 20m2 stops
Lufthansa Logo
20:15 - 21:05
LHR
-
USM
41h 50m2 stops
£764Lufthansa
man., 9 mar. - fre., 13 mar.
Multiple Airlines Logo
11:40 - 14:00
USM
-
LHR
33h 20m2 stops
Multiple Airlines Logo
21:00 - 08:25
LHR
-
USM
28h 25m2 stops
£819Multiple Airlines
fre., 16 jan. - fre., 23 jan.
Multiple Airlines Logo
13:25 - 07:00
USM
-
LHR
24h 35m2 stops
Multiple Airlines Logo
20:55 - 07:30
LHR
-
USM
27h 35m2 stops
£830Multiple Airlines
fre., 23 jan. - søn., 1 feb.
Multiple Airlines Logo
20:40 - 17:00
USM
-
LHR
27h 20m2 stops
Multiple Airlines Logo
21:20 - 21:20
LHR
-
USM
17h 00m1 stop
£900Multiple Airlines
søn., 18 jan. - søn., 25 jan.
Multiple Airlines Logo
21:10 - 19:05
USM
-
LHR
28h 55m1 stop
Multiple Airlines Logo
21:20 - 19:50
LHR
-
USM
15h 30m1 stop
£947Multiple Airlines
søn., 18 jan. - søn., 25 jan.
Multiple Airlines Logo
07:55 - 19:05
USM
-
LHR
18h 10m1 stop
Multiple Airlines Logo
20:55 - 07:45
LHR
-
USM
27h 50m2 stops
£978Multiple Airlines
fre., 23 jan. - søn., 1 feb.
Qatar Airways Logo
11:40 - 06:25
USM
-
LHR
25h 45m2 stops
Qatar Airways Logo
08:05 - 18:15
LHR
-
USM
27h 10m2 stops
£979Qatar Airways
man., 9 mar. - fre., 13 mar.
Qatar Airways Logo
11:40 - 06:25
USM
-
LHR
25h 45m2 stops
Qatar Airways Logo
08:40 - 18:15
LHR
-
USM
26h 35m2 stops
£982Qatar Airways
man., 9 mar. - fre., 13 mar.

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
USM11:40Ko Samui
25h 45m
2 stops
LHR06:25London Heathrow
13 Mar
LHR08:05London Heathrow
27h 10m
2 stops
USM18:15Ko Samui
£979
Find similar
Qatar Airways
9 Mar
USM11:40Ko Samui
25h 45m
2 stops
LHR06:25London Heathrow
13 Mar
LHR08:40London Heathrow
26h 35m
2 stops
USM18:15Ko Samui
£982
Find similar

British Airways flights from Ko Samui to London Heathrow Airport

Our best British Airways deals on Ko Samui to London Heathrow Airport flight tickets
British Airways
9 Mar
USM13:25Ko Samui
23h 30m
1 stop
LHR05:55London Heathrow
13 Mar
LHR18:40London Heathrow
19h 25m
1 stop
USM21:05Ko Samui
£1,046
Find similar
British Airways
9 Mar
USM13:25Ko Samui
23h 30m
1 stop
LHR05:55London Heathrow
13 Mar
LHR18:40London Heathrow
16h 35m
1 stop
USM18:15Ko Samui
£1,050
Find similar
British Airways
9 Mar
USM13:25Ko Samui
23h 00m
2 stops
LHR05:25London Heathrow
13 Mar
LHR18:40London Heathrow
16h 35m
1 stop
USM18:15Ko Samui
£1,054
Find similar

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 5 december 2025.
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

søn. 18/1

21:10-17:00

2 stops26h 50m

London Heathrow

søn. 25/1

21:00-08:25

2 stops28h 25m

£719

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

søn. 18/1

20:40-17:00

2 stops27h 20m

London Heathrow

søn. 25/1

14:05-08:00

3 stops34h 55m

£746

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

man. 9/3

13:25-08:45

2 stops26h 20m

London Heathrow

fre. 13/3

20:15-21:05

2 stops41h 50m

£764

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

fre. 16/1

11:40-14:00

2 stops33h 20m

London Heathrow

fre. 23/1

21:00-08:25

2 stops28h 25m

£819

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

fre. 23/1

13:25-07:00

2 stops24h 35m

London Heathrow

søn. 1/2

20:55-07:30

2 stops27h 35m

£830

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

søn. 18/1

20:40-17:00

2 stops27h 20m

London Heathrow

søn. 25/1

21:20-21:20

1 stop17h 00m

£900

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

søn. 18/1

21:10-19:05

1 stop28h 55m

London Heathrow

søn. 25/1

21:20-19:50

1 stop15h 30m

£947

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

fre. 23/1

07:55-19:05

1 stop18h 10m

London Heathrow

søn. 1/2

20:55-07:45

2 stops27h 50m

£978

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

man. 9/3

11:40-06:25

2 stops25h 45m

London Heathrow

fre. 13/3

08:05-18:15

2 stops27h 10m

£979

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

man. 9/3

11:40-06:25

2 stops25h 45m

London Heathrow

fre. 13/3

08:40-18:15

2 stops26h 35m

£982

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 £517. 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 £876.

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 £544. 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 £650 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 33% 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

25h 45m

Direct flights

None
The fastest flight from Ko Samui to London Heathrow Airport takes 25h 45m
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 23h 00m 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
Milton Keynes
Luton
Gatwick
Maidstone
Slough
Northampton
Swindon
Stratford-upon-Avon
Canterbury
Southend-on-Sea
Ipswich
Ilford
Poole
Guildford
Swanage
Hayes
Dover
Chelmsford
Colchester

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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