What is the cheapest airline that flies from Ko Samui to London Heathrow?

Thai Airways and British Airways are the most popular carriers operating from Ko Samui to London Heathrow

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.

£277 Cheap Flights from Ko Samui to London Heathrow Airport in 2026

Find the cheapest flights from Ko Samui to London

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

11:05 - 07:00USM Ko Samui-LHR London Heathrow

25h 55m2 stops Singapore Changi Abu Dhabi Zayed Intl

09:30 - 17:20LHR London Heathrow-USM Ko Samui

25h 50m2 stops Abu Dhabi Zayed Intl Singapore Changi

£748Multiple Airlines

Tue, 22 Sep - Tue, 29 Sep

17:25 - 06:55USM Ko Samui-LHR London Heathrow

19h 30m2 stops Bangkok Suvarnabhumi Manama Bahrain Intl

12:35 - 09:20LHR London Heathrow-USM Ko Samui

38h 45m2 stops Xiamen Gaoqi Intl Bangkok Suvarnabhumi

£776Multiple Airlines

Sun, 20 Sep - Sun, 27 Sep

15:20 - 06:55USM Ko Samui-LHR London Heathrow

21h 35m2 stops Bangkok Suvarnabhumi Manama Bahrain Intl

22:05 - 17:05LHR London Heathrow-USM Ko Samui

37h 00m2 stops Manama Bahrain Intl Bangkok Suvarnabhumi

£820Gulf Air

Tue, 15 Sep - Tue, 6 Oct

15:25 - 06:55USM Ko Samui-LHR London Heathrow

21h 30m2 stops Bangkok Suvarnabhumi Manama Bahrain Intl

22:05 - 16:50LHR London Heathrow-USM Ko Samui

36h 45m2 stops Manama Bahrain Intl Bangkok Suvarnabhumi

£828Gulf Air

Tue, 15 Sep - Tue, 6 Oct

08:40 - 08:00USM Ko Samui-LHR London Heathrow

29h 20m2 stops Singapore Changi Doha Hamad Intl

10:00 - 17:05LHR London Heathrow-USM Ko Samui

25h 05m2 stops Manama Bahrain Intl Bangkok Suvarnabhumi

£832Multiple Airlines

Fri, 4 Sep - Thu, 10 Sep

08:40 - 08:00USM Ko Samui-LHR London Heathrow

29h 20m2 stops Singapore Changi Doha Hamad Intl

10:00 - 17:05LHR London Heathrow-USM Ko Samui

25h 05m2 stops Manama Bahrain Intl Bangkok Suvarnabhumi

£846Multiple Airlines

Fri, 4 Sep - Thu, 10 Sep

08:45 - 06:30USM Ko Samui-LHR London Heathrow

27h 45m2 stops Bangkok Suvarnabhumi Muscat Seeb

20:50 - 11:15LHR London Heathrow-USM Ko Samui

32h 25m2 stops Muscat Seeb Bangkok Suvarnabhumi

£848Oman Air

Thu, 17 Sep - Sun, 20 Sep

14:35 - 06:55USM Ko Samui-LHR London Heathrow

22h 20m2 stops Bangkok Suvarnabhumi Manama Bahrain Intl

10:00 - 15:45LHR London Heathrow-USM Ko Samui

23h 45m2 stops Manama Bahrain Intl Bangkok Suvarnabhumi

£874Gulf Air

Tue, 15 Sep - Tue, 6 Oct

07:50 - 19:15USM Ko Samui-LHR London Heathrow

17h 25m1 stop Bangkok Suvarnabhumi

21:20 - 07:10LHR London Heathrow-USM Ko Samui

27h 50m2 stops Shanghai Pu Dong Bangkok Suvarnabhumi

£874Multiple Airlines

Sun, 20 Sep - Sun, 27 Sep

15:50 - 06:55USM Ko Samui-LHR London Heathrow

21h 05m2 stops Bangkok Suvarnabhumi Manama Bahrain Intl

10:00 - 15:10LHR London Heathrow-USM Ko Samui

23h 10m2 stops Manama Bahrain Intl Bangkok Suvarnabhumi

£876Gulf Air

Tue, 15 Sep - Tue, 6 Oct

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Gulf Air flights from Ko Samui to London Heathrow Airport

Our best Gulf Air deals on Ko Samui to London Heathrow Airport flight tickets

Gulf Air

15 Sept

USM15:20Ko Samui

21h 35m

2 stops

LHR06:55London Heathrow

6 Oct

LHR22:05London Heathrow

37h 00m

2 stops

USM17:05Ko Samui

£820

Gulf Air

15 Sept

USM15:25Ko Samui

21h 30m

2 stops

LHR06:55London Heathrow

6 Oct

LHR22:05London Heathrow

36h 45m

2 stops

USM16:50Ko Samui

£828

Gulf Air

15 Sept

USM14:35Ko Samui

22h 20m

2 stops

LHR06:55London Heathrow

6 Oct

LHR10:00London Heathrow

23h 45m

2 stops

USM15:45Ko Samui

£874

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

22 Sept

USM08:45Ko Samui

16h 35m

1 stop

LHR19:20London Heathrow

29 Sept

LHR21:35London Heathrow

14h 55m

1 stop

USM18:30Ko Samui

£952

EVA Air

15 Sept

USM09:15Ko Samui

16h 05m

1 stop

LHR19:20London Heathrow

6 Oct

LHR21:35London Heathrow

18h 00m

1 stop

USM21:35Ko Samui

£992

EVA Air

15 Sept

USM09:15Ko Samui

16h 05m

1 stop

LHR19:20London Heathrow

6 Oct

LHR21:35London Heathrow

18h 00m

1 stop

USM21:35Ko Samui

£994

momondo Fare Finder

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

Cheapest return flight

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Tue 22/9

11:05-07:00

2 stops25h 55m

London Heathrow

Tue 29/9

09:30-17:20

2 stops25h 50m

£748

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Sun 20/9

17:25-06:55

2 stops19h 30m

London Heathrow

Sun 27/9

12:35-09:20

2 stops38h 45m

£776

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Tue 15/9

15:20-06:55

2 stops21h 35m

London Heathrow

Tue 6/10

22:05-17:05

2 stops37h 00m

£820

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Tue 15/9

15:25-06:55

2 stops21h 30m

London Heathrow

Tue 6/10

22:05-16:50

2 stops36h 45m

£828

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Fri 4/9

08:40-08:00

2 stops29h 20m

London Heathrow

Thu 10/9

10:00-17:05

2 stops25h 05m

£832

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Fri 4/9

08:40-08:00

2 stops29h 20m

London Heathrow

Thu 10/9

10:00-17:05

2 stops25h 05m

£846

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Thu 17/9

08:45-06:30

2 stops27h 45m

London Heathrow

Sun 20/9

20:50-11:15

2 stops32h 25m

£848

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Tue 15/9

14:35-06:55

2 stops22h 20m

London Heathrow

Tue 6/10

10:00-15:45

2 stops23h 45m

£874

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Sun 20/9

07:50-19:15

1 stop17h 25m

London Heathrow

Sun 27/9

21:20-07:10

2 stops27h 50m

£874

Fastest return journey

Ko SamuiLondon

USM Ko Samui - LHR London Heathrow

USMLHR

Ko Samui

Tue 15/9

15:50-06:55

2 stops21h 05m

London Heathrow

Tue 6/10

10:00-15:10

2 stops23h 10m

£876

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

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

You could potentially save up to 22% on your flight if you consider stops on a Ko Samui to London Heathrow Airport flight.

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

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	20h 35m
Direct flights	None

The fastest flight from Ko Samui to London Heathrow Airport takes 20h 35m

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

Frequently asked questions about flying from Ko Samui to London Heathrow Airport

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 20h 35m 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.

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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.