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Cheap flights from Ko Samui to London from £274

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 4/6. 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.
Emirates Logo
16:25 - 07:05
USM
-
LHR
20h 40m2 stops
Emirates Logo
14:25 - 21:10
LHR
-
USM
24h 45m2 stops
£897Emirates
Sun, 7 Jun - Wed, 10 Jun
EVA Air Logo
07:50 - 19:20
USM
-
LHR
17h 30m1 stop
EVA Air Logo
21:35 - 20:30
LHR
-
USM
16h 55m1 stop
£941EVA Air
Sun, 7 Jun - Wed, 10 Jun
EVA Air Logo
08:30 - 19:05
USM
-
LHR
17h 35m1 stop
EVA Air Logo
21:20 - 19:50
LHR
-
USM
15h 30m1 stop
£975EVA Air
Wed, 11 Mar - Sun, 15 Mar
EVA Air Logo
07:15 - 19:05
USM
-
LHR
18h 50m1 stop
EVA Air Logo
21:20 - 19:50
LHR
-
USM
15h 30m1 stop
£976EVA Air
Wed, 11 Mar - Sun, 15 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
£1,014Qatar Airways
Wed, 11 Mar - Sun, 15 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
£1,016Qatar Airways
Wed, 11 Mar - Sun, 15 Mar
British Airways Logo
13:30 - 05:25
USM
-
LHR
21h 55m2 stops
British Airways Logo
19:25 - 18:15
LHR
-
USM
16h 50m1 stop
£1,080British Airways
Sun, 7 Jun - Wed, 10 Jun
British Airways Logo
13:25 - 05:25
USM
-
LHR
23h 00m2 stops
British Airways Logo
18:40 - 21:05
LHR
-
USM
19h 25m1 stop
£1,113British Airways
Wed, 11 Mar - Sun, 15 Mar
British Airways Logo
13:25 - 05:25
USM
-
LHR
23h 00m2 stops
British Airways Logo
21:00 - 21:05
LHR
-
USM
17h 05m1 stop
£1,114British Airways
Wed, 11 Mar - Sun, 15 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
7 Jun
USM07:50Ko Samui
17h 30m
1 stop
LHR19:20London Heathrow
10 Jun
LHR21:35London Heathrow
16h 55m
1 stop
USM20:30Ko Samui
£941
Find similar
EVA Air
11 Mar
USM08:30Ko Samui
17h 35m
1 stop
LHR19:05London Heathrow
15 Mar
LHR21:20London Heathrow
15h 30m
1 stop
USM19:50Ko Samui
£975
Find similar
EVA Air
11 Mar
USM07:15Ko Samui
18h 50m
1 stop
LHR19:05London Heathrow
15 Mar
LHR21:20London Heathrow
15h 30m
1 stop
USM19:50Ko Samui
£976
Find similar

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
11 Mar
USM11:40Ko Samui
25h 45m
2 stops
LHR06:25London Heathrow
15 Mar
LHR08:40London Heathrow
26h 35m
2 stops
USM18:15Ko Samui
£1,014
Find similar
Qatar Airways
11 Mar
USM11:40Ko Samui
25h 45m
2 stops
LHR06:25London Heathrow
15 Mar
LHR08:40London Heathrow
26h 35m
2 stops
USM18:15Ko Samui
£1,016
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 21 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

Sun 7/6

16:25-07:05

2 stops20h 40m

London Heathrow

Wed 10/6

14:25-21:10

2 stops24h 45m

£897

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 7/6

07:50-19:20

1 stop17h 30m

London Heathrow

Wed 10/6

21:35-20:30

1 stop16h 55m

£941

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 11/3

08:30-19:05

1 stop17h 35m

London Heathrow

Sun 15/3

21:20-19:50

1 stop15h 30m

£975

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 11/3

07:15-19:05

1 stop18h 50m

London Heathrow

Sun 15/3

21:20-19:50

1 stop15h 30m

£976

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 11/3

11:40-06:25

2 stops25h 45m

London Heathrow

Sun 15/3

08:40-18:15

2 stops26h 35m

£1,014

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 11/3

11:40-06:25

2 stops25h 45m

London Heathrow

Sun 15/3

08:40-18:15

2 stops26h 35m

£1,016

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 7/6

13:30-05:25

2 stops21h 55m

London Heathrow

Wed 10/6

19:25-18:15

1 stop16h 50m

£1,080

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 11/3

13:25-05:25

2 stops23h 00m

London Heathrow

Sun 15/3

18:40-21:05

1 stop19h 25m

£1,113

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 11/3

13:25-05:25

2 stops23h 00m

London Heathrow

Sun 15/3

21:00-21:05

1 stop17h 05m

£1,114

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 4/6

16:25-15:15

2 stops28h 50m

£274

Flights are sorted by cheapest return flights first.

Showing 1-10 of 19 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 £516. 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 £874.

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 £543. 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 £648 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 40% 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

18h 50m

Direct flights

None
The fastest flight from Ko Samui to London Heathrow Airport takes 18h 50m
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 18h 50m 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
Southend-on-Sea
Canterbury
Ipswich
Ilford
Poole
Guildford
Swanage
Hayes
Chelmsford
Dover
Worthing

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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