Which airport is the most popular for stopovers for flights between London Heathrow Airport and Ko Samui?

Bangkok (BKK) was the most common stop: 74% of momondo users choosing one-stop flights on this route connected there.

Which stopover airport has the shortest connection time from London Heathrow Airport to Ko Samui?

Bangkok (BKK) has the shortest average stopover time for this route: 2h 46m.

Which stopover airport offers the lowest fares from London Heathrow Airport to Ko Samui?

Flights via Hong Kong (HKG) offer the lowest average return price of £823.

Which airlines fly to Ko Samui?

EVA Air, Thai Airways and Singapore Airlines are the top three most popular airlines that fly to Ko Samui from London Heathrow Airport according to our data. EVA Air is the first choice among our users, with 43% of people opting to fly with this airline when travelling to Ko Samui. Keep in mind that there are 13 different airlines that fly to Ko Samui on a routine basis, so you have a few additional options to choose from.

Which stopover airport has the shortest travel time from London Heathrow Airport to Ko Samui?

Flights connecting via Kuwait City (KWI) have the shortest average one-way travel time: 15h 20m.

What day of the week experiences the fewest flight delays on this route?

Wednesday is statistically the day of the week that experiences the fewest delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on London to Ko Samui flights?

According to our data, Virgin Atlantic have had the fewest delays on this route over the last 12 months, with about 5% of their flights experiencing any sort of delay.

What is the most punctual flight time for London to Ko Samui flights?

Generally, flights departing in the evening tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

How often are flights from London to Ko Samui delayed?

Historically, on average around 10% of flights between London and Ko Samui have experienced a delay on any given week. The average delay length over the past 12 months has been 164 minutes.

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

Prices for flights from London Heathrow Airport to Ko Samui Airport were last updated today.

How many operators does momondo search for flights from London Heathrow Airport to Ko Samui Airport?

As of December 2025, there are 13 operators available to choose from for flights from London Heathrow Airport to Ko Samui Airport.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Heathrow Airport to Ko Samui Airport.

What documentation or ID do you need to fly to Ko Samui Airport?

The required travel and health documents for your Ko Samui Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ko Samui Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

£338 Cheap Flights from London Heathrow Airport to Ko Samui in 2025/26

Q: What is the typical price of a round-trip flight between London Heathrow Airport and Ko Samui?

Prices are currently low for flights on this route. Typical prices usually range from £1,113 to £1,478. The lowest price recently found on this route was £743.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from London Heathrow Airport to Ko Samui

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

20:05 - 12:45

LHR

USM

34h 40m2 stops

10:05 - 21:45

USM

LHR

17h 40m2 stops

£743Multiple Airlines

Sat, 13 Jun - Fri, 26 Jun

13:55 - 21:20

LHR

USM

24h 25m2 stops

19:00 - 14:30

USM

LHR

26h 30m2 stops

£744Etihad Airways

Wed, 25 Feb - Sun, 15 Mar

20:05 - 12:45

LHR

USM

34h 40m2 stops

10:05 - 21:45

USM

LHR

17h 40m2 stops

£745Multiple Airlines

Sat, 13 Jun - Fri, 26 Jun

08:25 - 20:50

LHR

USM

30h 25m2 stops

19:45 - 19:10

USM

LHR

29h 25m2 stops

£745Multiple Airlines

Fri, 17 Apr - Fri, 24 Apr

21:45 - 08:15

LHR

USM

28h 30m2 stops

17:55 - 07:00

USM

LHR

43h 05m2 stops

£746Etihad Airways

Fri, 24 Apr - Sun, 10 May

21:45 - 07:10

LHR

USM

27h 25m2 stops

20:50 - 15:15

USM

LHR

24h 25m2 stops

£750Etihad Airways

Tue, 21 Apr - Thu, 14 May

14:45 - 21:35

LHR

USM

24h 50m2 stops

18:55 - 18:45

USM

LHR

29h 50m2 stops

£754Etihad Airways

Sat, 13 Jun - Tue, 23 Jun

13:55 - 17:50

LHR

USM

20h 55m2 stops

19:00 - 18:10

USM

LHR

30h 10m2 stops

£756Etihad Airways

Mon, 23 Feb - Sat, 14 Mar

21:00 - 08:10

LHR

USM

28h 10m2 stops

19:00 - 17:30

USM

LHR

29h 30m2 stops

£757Multiple Airlines

Tue, 3 Mar - Thu, 12 Mar

13:55 - 15:35

LHR

USM

18h 40m2 stops

13:25 - 06:40

USM

LHR

24h 15m2 stops

£759Etihad Airways

Tue, 17 Mar - Thu, 26 Mar

British Airways flights from London Heathrow Airport to Ko Samui

Our best British Airways deals on London Heathrow Airport to Ko Samui flight tickets

British Airways

14 Apr

LHR19:25London Heathrow

16h 50m

1 stop

USM18:15Ko Samui

14 May

USM13:30Ko Samui

21h 55m

2 stops

LHR05:25London Heathrow

£769

Find similar

British Airways

20 Feb

LHR18:40London Heathrow

16h 35m

1 stop

USM18:15Ko Samui

16 Mar

USM13:25Ko Samui

23h 30m

1 stop

LHR05:55London Heathrow

£772

Find similar

British Airways

25 Feb

LHR20:35London Heathrow

38h 40m

2 stops

USM18:15Ko Samui

18 Mar

USM16:25Ko Samui

20h 30m

1 stop

LHR05:55London Heathrow

£780

Find similar

Cathay Pacific flights from London Heathrow Airport to Ko Samui

Our best Cathay Pacific deals on London Heathrow Airport to Ko Samui flight tickets

Cathay Pacific

19 Jan

LHR17:50London Heathrow

18h 45m

1 stop

USM19:35Ko Samui

29 Jan

USM11:40Ko Samui

34h 20m

1 stop

LHR15:00London Heathrow

£784

Find similar

Cathay Pacific

12 Jan

LHR17:50London Heathrow

18h 45m

1 stop

USM19:35Ko Samui

12 Feb

USM11:40Ko Samui

24h 45m

1 stop

LHR05:25London Heathrow

£817

Find similar

Cathay Pacific

12 Jan

LHR22:05London Heathrow

38h 30m

1 stop

USM19:35Ko Samui

12 Feb

USM11:40Ko Samui

24h 45m

1 stop

LHR05:25London Heathrow

£819

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Ko Samui that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sat 13/6

20:05-12:45

2 stops34h 40m

Ko Samui

Fri 26/6

10:05-21:45

2 stops17h 40m

£743

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Wed 25/2

13:55-21:20

2 stops24h 25m

Ko Samui

Sun 15/3

19:00-14:30

2 stops26h 30m

£744

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sat 13/6

20:05-12:45

2 stops34h 40m

Ko Samui

Fri 26/6

10:05-21:45

2 stops17h 40m

£745

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Fri 17/4

08:25-20:50

2 stops30h 25m

Ko Samui

Fri 24/4

19:45-19:10

2 stops29h 25m

£745

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Fri 24/4

21:45-08:15

2 stops28h 30m

Ko Samui

Sun 10/5

17:55-07:00

2 stops43h 05m

£746

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 21/4

21:45-07:10

2 stops27h 25m

Ko Samui

Thu 14/5

20:50-15:15

2 stops24h 25m

£750

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sat 13/6

14:45-21:35

2 stops24h 50m

Ko Samui

Tue 23/6

18:55-18:45

2 stops29h 50m

£754

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 23/2

13:55-17:50

2 stops20h 55m

Ko Samui

Sat 14/3

19:00-18:10

2 stops30h 10m

£756

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 3/3

21:00-08:10

2 stops28h 10m

Ko Samui

Thu 12/3

19:00-17:30

2 stops29h 30m

£757

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 17/3

13:55-15:35

2 stops18h 40m

Ko Samui

Thu 26/3

13:25-06:40

2 stops24h 15m

£759

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 London Heathrow Airport to Ko Samui

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

Delays

Stopovers

What is the typical price of a round-trip flight between London Heathrow Airport and Ko Samui?

What is the cheapest month to fly to Ko Samui?

The cheapest month to fly to Ko Samui from London Heathrow Airport is in May. Flight prices, which tend to average around £788, are often lower during this time because this is during the off-season. If you don’t want to visit Ko Samui in May, then you should wait until June to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of £808.

What is the cheapest day to depart on your flight to Ko Samui?

According to our data, Wednesday is the cheapest day to fly to Ko Samui from London Heathrow Airport. The lowest ticket price found for a Wednesday departure recently was £494. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Ko Samui on Sunday is £843.

What is the cheapest time of day to depart on your flight to Ko Samui?

Our most recent data shows that the best time of day to fly to Ko Samui is in the afternoon. Flights from London Heathrow Airport to Ko Samui during this time can be as low as £501. Flights at midday are often more expensive, with an average ticket price of £814.

How far in advance should I book a flight to Ko Samui?

You are more likely to see cheaper flights to Ko Samui from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Ko Samui for around £909 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ko Samui from London Heathrow Airport for as low as £782 on momondo.

When to book flights from London Heathrow Airport to Ko Samui

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

Estimated return price

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

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

Fastest flight time	17h 05m
Direct flights	None

The fastest flight from London Heathrow Airport to Ko Samui takes 17h 05m

There are no direct flights from London Heathrow Airport to Ko Samui. There are no popular flight routes from London Heathrow Airport to Ko Samui.

Search flight deals

How far is London Heathrow to Ko Samui by plane?
The straight-line distance from London Heathrow to Ko Samui is 6145.4 mi. Flights usually cover this in 17h 05m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from London Heathrow Airport to Ko Samui Airport?
Prices for flights from London Heathrow Airport to Ko Samui Airport were last updated today.
How many operators does momondo search for flights from London Heathrow Airport to Ko Samui Airport?
As of December 2025, there are 13 operators available to choose from for flights from London Heathrow Airport to Ko Samui Airport.
How old do you have to be to fly from London Heathrow Airport to Ko Samui Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Heathrow Airport to Ko Samui Airport.
What documentation or ID do you need to fly to Ko Samui Airport?
The required travel and health documents for your Ko Samui Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ko Samui Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from London Heathrow Airport to Ko Samui?
momondo data reveals that the most frequently booked airline on the route from London Heathrow Airport to Ko Samui is EVA Air, representing 36% of all bookings. The subsequent popular airlines are Thai Airways at 35%, Singapore Airlines at 9%, and British Airways at 5%.

Best airlines flying from London Heathrow Airport to Ko Samui

Compare and see reviews for airlines that fly from London Heathrow Airport to Ko Samui with momondo

Airline	Rating	Free Cancellation	Price
Bangkok Airways	PriceFrom £114	Free Cancellation	Rating 8.0 118 reviews	Search Bangkok Airways flights
Air India	PriceFrom £475	Free Cancellation	Rating 5.5 2,952 reviews	Search Air India flights
Austrian Airlines	PriceFrom £602	Free Cancellation	Rating 7.6 879 reviews	Search Austrian Airlines flights
Lufthansa	PriceFrom £604	Free Cancellation	Rating 6.8 7,638 reviews	Search Lufthansa flights
SWISS	PriceFrom £608	Free Cancellation	Rating 7.5 1,817 reviews	Search SWISS flights
KLM	PriceFrom £636	Free Cancellation	Rating 7.7 1,428 reviews	Search KLM flights
Etihad Airways	PriceFrom £648	Free Cancellation	Rating 7.4 1,334 reviews	Search Etihad Airways flights
Air France	PriceFrom £662	Free Cancellation	Rating 7.4 1,508 reviews	Search Air France flights
EVA Air	PriceFrom £729	Free Cancellation	Rating 8.4 1,297 reviews	Search EVA Air flights
British Airways	PriceFrom £744	Free Cancellation	Rating 6.7 7,587 reviews	Search British Airways flights

Ko Pha Ngan

Ko Tao

Khanom

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Ko Samui for you.

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

momondo does allow users to show only those flights to Ko Samui from London which offer a flexible booking policy as well as other useful filters and features.

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

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 London to Ko Samui.

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

If you are not ready to book a flight from London to Ko Samui now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ko Samui and let you know when they change.

An easier way to manage your Ko Samui trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Sat 17/1

Sat 24/1

Email me momondo's favourite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Thailand

Airports servicing Thailand

Utapao Rayong Pattaya Airport

Cheap flights from London Heathrow Airport to Ko Samui from £338

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from London Heathrow Airport to Ko Samui

Cheap return flights

Cheap one-way flights

Cheap last-minute flights

British Airways flights from London Heathrow Airport to Ko Samui

Our best British Airways deals on London Heathrow Airport to Ko Samui flight tickets

Cathay Pacific flights from London Heathrow Airport to Ko Samui

Our best Cathay Pacific deals on London Heathrow Airport to Ko Samui flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Ko Samui that are best for you.

See travel insights to Ko Samui from

How to get the cheapest flight ticket from London Heathrow Airport to Ko Samui

What is the typical price of a round-trip flight between London Heathrow Airport and Ko Samui?

What is the cheapest month to fly to Ko Samui?

What is the cheapest day to depart on your flight to Ko Samui?

What is the cheapest time of day to depart on your flight to Ko Samui?

Our most recent data shows that the best time of day to fly to Ko Samui is in the afternoon. Flights from London Heathrow Airport to Ko Samui during this time can be as low as £501. Flights at midday are often more expensive, with an average ticket price of £814.

How far in advance should I book a flight to Ko Samui?

Which airlines fly to Ko Samui?

How often are flights from London to Ko Samui delayed?

Historically, on average around 10% of flights between London and Ko Samui have experienced a delay on any given week. The average delay length over the past 12 months has been 164 minutes.

What is the most punctual flight time for London to Ko Samui flights?

Generally, flights departing in the evening tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Wednesday is statistically the day of the week that experiences the fewest delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on London to Ko Samui flights?

According to our data, Virgin Atlantic have had the fewest delays on this route over the last 12 months, with about 5% of their flights experiencing any sort of delay.

Which airport is the most popular for stopovers for flights between London Heathrow Airport and Ko Samui?

Bangkok (BKK) was the most common stop: 74% of momondo users choosing one-stop flights on this route connected there.

Which stopover airport offers the lowest fares from London Heathrow Airport to Ko Samui?

Flights via Hong Kong (HKG) offer the lowest average return price of £823.

Which stopover airport has the shortest travel time from London Heathrow Airport to Ko Samui?

Flights connecting via Kuwait City (KWI) have the shortest average one-way travel time: 15h 20m.

Which stopover airport has the shortest connection time from London Heathrow Airport to Ko Samui?

Bangkok (BKK) has the shortest average stopover time for this route: 2h 46m.

When to book flights from London Heathrow Airport to Ko Samui

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

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

Fastest flight time

Direct flights

How far is London Heathrow to Ko Samui by plane?

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

How many operators does momondo search for flights from London Heathrow Airport to Ko Samui Airport?

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

What documentation or ID do you need to fly to Ko Samui Airport?

What is the most popular airline from London Heathrow Airport to Ko Samui?

Best airlines flying from London Heathrow Airport to Ko Samui

Compare and see reviews for airlines that fly from London Heathrow Airport to Ko Samui with momondo

Travelling to a place near Ko Samui?

Why use momondo?

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

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

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

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

An easier way to manage your Ko Samui trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Thailand

Airports servicing Thailand