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Ko Samui

$483+ Cheap flights from Heathrow (LHR) to Ko Samui (USM)

LHR — USM
Oct 22 — Oct 291
Thu 10/22
Thu 10/29
1 adult, Economy
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Find cheap flights from Heathrow to Ko Samui with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Heathrow to Ko Samui

Cheapest flights from Heathrow to Ko Samui

Wed 11/45:45 pm -
2 stops33h 55m
Wed 11/116:15 pm -
2 stops30h 35m
Deal found 9/19$896
Sat 11/217:25 pm -
2 stops18h 00m
Thu 12/310:00 am -
2 stops29h 05m
Deal found 9/21$938
Sun 11/85:45 pm -
2 stops33h 55m
Tue 11/2410:20 am -
2 stops38h 30m
Deal found 9/21$942
Sun 11/19:00 pm -
2 stops28h 10m
Mon 11/306:15 pm -
2 stops30h 15m
Deal found 9/19$944
Tue 11/39:00 am -
2 stops18h 40m
Tue 11/1710:20 am -
2 stops18h 20m
Deal found 9/21$945
Tue 11/39:00 am -
2 stops18h 40m
Thu 11/1910:20 am -
2 stops18h 20m
Deal found 9/21$950
Sun 11/155:05 pm -
2 stops21h 00m
Tue 11/2411:40 am -
2 stops27h 15m
Deal found 9/19$964
Tue 10/64:35 pm -
3 stops21h 50m
Sat 10/108:40 am -
2 stops27h 50m
Deal found 9/20$970
Thu 11/125:35 pm -
2 stops20h 30m
Wed 11/187:55 am -
2 stops20h 30m
Deal found 9/20$975
Fri 10/29:45 am -
2 stops28h 45m
Thu 10/1510:05 am -
2 stops30h 10m
Deal found 9/19$986

Find flight deals from Heathrow to Ko Samui

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$896
(Booking.com)

One-way from

$483
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$1,182
Provider with most accurate pricing for London Heathrow-Ko Samui flight deals.
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Provider most trusted by Cheapflights users for London Heathrow-Ko Samui flights.
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From London Heathrow to Ko Samui
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One-way flight from London Heathrow to Ko Samui
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Highest demand for flights based on searches. 3% potential increase in price ($49 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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Cheapflights 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

Cheapest round-trip

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Sat 1/9

10:00 pm-7:45 am

2 stops26h 45m

Ko Samui

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$783

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Fri 12/25

3:40 pm-12:20 pm

3 stops37h 40m

Ko Samui

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$787

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Mon 12/28

8:25 am-9:20 pm

2 stops29h 55m

Ko Samui

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$814

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Tue 12/29

8:05 pm-10:35 am

2 stops31h 30m

Ko Samui

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$814

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Sat 1/9

8:05 pm-10:35 am

2 stops31h 30m

Ko Samui

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$818

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Sun 11/15

9:20 pm-8:25 pm

1 stop16h 05m

Ko Samui

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$830

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Sat 1/9

10:05 pm-7:35 pm

1 stop38h 30m

Ko Samui

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$950

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Tue 12/29

2:00 pm-5:40 pm

2 stops20h 40m

Ko Samui

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$964

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Sun 12/27

8:35 am-10:40 am

2 stops19h 05m

Ko Samui

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$1,162

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Sat 1/2

9:20 pm-9:20 pm

1 stop17h 00m

Ko Samui

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$1,191

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/20

Showing 1-10 of 16 resultsSorted by cheapest first
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Compare providers for flights from Heathrow to Ko Samui

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Heathrow to Ko Samui in September.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
BudgetAirPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on London Heathrow Airport-Ko Samui flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London Heathrow Airport-Ko Samui flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Ko Samui flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London Heathrow Airport-Ko Samui flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London Heathrow Airport-Ko Samui flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Heathrow to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Heathrow with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Ko Samui

How far ahead should I book a flight from London Heathrow Airport to Ko Samui?

The price you pay for your flight from London Heathrow Airport to Ko Samui may vary depending on when you book. For the best chance of a lower fare, look to book 84 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from London Heathrow Airport to Ko Samui?

Currently, November is the cheapest month in which you can book a flight from London Heathrow Airport to Ko Samui (average of $1,071). Flying from London Heathrow Airport to Ko Samui in December is currently the most expensive (average of $1,656). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from London Heathrow Airport to Ko Samui?

Airfare is below average for this route at the moment.

London Heathrow Airport to Ko Samui flights typically cost between $1,108 and $1,302 in November.
The cheapest round-trip price found within the last 5 days was $896 on Multiple Airlines (Nov 4-Nov 11).

The best insider tips for London Heathrow Airport to Ko Samui flights

Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to Ko Samui trip
Our travel experts
Blane Bachelor

Blane Bachelor

Expert on Virgin Atlantic

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more
Gabriel Leigh

Gabriel Leigh

Expert on British Airways

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more

Related info for your journey

  • What airport do you fly into for flights to Ko Samui from London Heathrow?

    For a flight from London Heathrow to Ko Samui, you will be flying into Ko Samui. Ko Samui (USM) is just 2.1 mi from the center of the city. Ko Samui is the only Ko Samui airport and it handles 0 inbound flights from London Heathrow per day. 0 airlines have flights to Ko Samui from London Heathrow on a regular basis.

  • How long is the flight from London Heathrow Airport to Ko Samui?

    For as low as $1,385, Singapore Airlines can have you in Ko Samui from London Heathrow Airport in 19h 20m. The distance between London Heathrow Airport and Ko Samui is about 6144 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Heathrow to Ko Samui that include hotel bookings?

    Yes. In addition to deals on Heathrow to Ko Samui flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Ko Samui?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Ko Samui.

  • Can I find deals for business class flights from Heathrow to Ko Samui?

    Yes. Cheapflights offers flight deals from Heathrow to Ko Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London Heathrow Airport to Ko Samui?

    Currently, November is the cheapest month in which you can book a flight from London Heathrow Airport to Ko Samui (average of $1,071). Flying from London Heathrow Airport to Ko Samui in December is currently the most expensive (average of $1,656). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Ko Samui?

Book flights to Ko Samui if you plan to visit one of these locations
Ko Tao
Ko Pha Ngan

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