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Ko Samui

$468+ Cheap flights from Heathrow (LHR) to Ko Samui (USM)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — USM
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
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

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Cheapflights Tip: The best prices from London Heathrow to Ko Samui are usually found in May or September, booked 85 days in advance, depart on a Friday or Wednesday and return on a Wednesday

Find flight deals from Heathrow to Ko Samui

Cheapest flights from Heathrow to Ko Samui
Explore the most affordable flight options available from Heathrow to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This SmartFares deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/249:00 amLHR - USM
2 stops29h 05mMultiple Airlines
Wed 12/310:00 amUSM - LHR
2 stops18h 40mMultiple Airlines
Deal found 10/29$960
This Gotogate deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2410:40 amLHR - USM
1 stop23h 30mSingapore Airlines
Wed 12/36:05 pmUSM - LHR
1 stop18h 50mSingapore Airlines
Deal found 10/29$1,078
This SmartFares deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/249:20 pmLHR - USM
1 stop15h 55mEVA Air
Wed 12/39:20 amUSM - LHR
1 stop16h 45mEVA Air
Deal found 10/29$1,111
This Singapore Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1810:40 amLHR - USM
1 stop25h 10mSingapore Airlines
Wed 12/36:05 pmUSM - LHR
1 stop18h 50mSingapore Airlines
Deal found 10/30$1,131
This Cathay Pacific deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/186:05 amLHR - USM
2 stops30h 30mMultiple Airlines
Tue 12/211:40 amUSM - LHR
1 stop25h 50mMultiple Airlines
Deal found 10/30$1,203
This Cathay Pacific deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/286:30 amLHR - USM
2 stops30h 05mMultiple Airlines
Fri 12/511:40 amUSM - LHR
1 stop36h 40mMultiple Airlines
Deal found 10/29$1,234
This Cathay Pacific deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/175:50 pmLHR - USM
1 stop18h 45mMultiple Airlines
Mon 11/2411:40 amUSM - LHR
2 stops32h 50mMultiple Airlines
Deal found 10/30$1,237
This Cathay Pacific deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/36:45 amLHR - USM
2 stops29h 50mMultiple Airlines
Mon 12/111:40 amUSM - LHR
1 stop36h 40mMultiple Airlines
Deal found 10/30$1,251
This Cathay Pacific deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/216:30 amLHR - USM
2 stops30h 05mMultiple Airlines
Mon 12/111:40 amUSM - LHR
1 stop36h 40mMultiple Airlines
Deal found 10/29$1,268

Cheap flight deals from Heathrow to Ko Samui

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Ko Samui (USM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 30, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$946
(Etihad Airways)

One-way from

$468
(Kiwi.com)

Popular in

December

Cheapest in

May

Average price

$1,097
Provider with most accurate pricing for London Heathrow-Ko Samui flight deals.
Search Deals
Provider most trusted by Cheapflights users for London Heathrow-Ko Samui flights.
Search Deals
From London Heathrow to Ko Samui
Search Deals
One-way flight from London Heathrow to Ko Samui
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($109 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Heathrow to Ko Samui 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, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Ko Samui that are best for you.

Fly from

Heathrow

Fly to

Ko Samui

Route

Depart

Return

Price

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Thu 4/9

8:55 pm-7:20 am

2 stops28h 25m

Ko Samui

Sun 5/10

6:55 pm-3:15 pm

2 stops26h 20m

$970

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sun 3/22

8:55 pm-8:50 pm

2 stops16h 55m

Ko Samui

Sun 3/29

5:55 pm-12:45 pm

2 stops24h 50m

$972

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sun 1/11

7:25 pm-6:55 pm

2 stops16h 30m

Ko Samui

Mon 1/26

10:00 am-9:40 pm

2 stops18h 40m

$993

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 3/23

7:20 pm-9:20 pm

2 stops19h 00m

Ko Samui

Sun 3/29

5:55 pm-12:45 pm

2 stops24h 50m

$1,000

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 3/24

2:50 pm-3:35 pm

2 stops17h 45m

Ko Samui

Wed 4/22

4:25 pm-7:55 am

2 stops21h 30m

$1,025

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Wed 1/7

6:40 pm-9:05 pm

2 stops19h 25m

Ko Samui

Wed 1/28

9:20 am-8:05 am

2 stops29h 45m

$1,029

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Thu 4/2

10:00 am-6:15 pm

2 stops26h 15m

Ko Samui

Sun 4/19

1:30 pm-6:55 am

2 stops23h 25m

$1,061

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 3/23

7:20 pm-9:20 pm

2 stops19h 00m

Ko Samui

Sat 3/28

3:50 pm-11:45 am

2 stops26h 55m

$1,098

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 3/24

8:55 pm-8:50 pm

2 stops16h 55m

Ko Samui

Fri 3/27

12:30 pm-6:40 am

2 stops25h 10m

$1,115

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Thu 4/9

10:05 pm-9:10 pm

1 stop17h 05m

Ko Samui

Sun 5/10

5:25 pm-7:45 am

2 stops20h 20m

$1,198

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 18 results
1
2

Compare providers for flights from Heathrow to Ko Samui

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
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 October.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
GotogatePrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 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 Gotogate to be most consistent on Cheapflights vs. Gotogate Users can find the same prices on London Heathrow Airport-Ko Samui flight deals on Cheapflights vs. Gotogate >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 Gotogate the most. Gotogate 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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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?

Use this chart to determine the optimal time to book a round-trip flight from Heathrow to Ko Samui. Price data was last updated on October 24, 2025.

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 85 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, October is the cheapest month in which you can book a flight from London Heathrow Airport to Ko Samui (average of $689). Flying from London Heathrow Airport to Ko Samui in December is currently the most expensive (average of $1,115). 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.

What is the cheapest time of day to fly from LHR to USM?

Find hourly flight availability from Heathrow to Ko Samui. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Ko Samui in the afternoon. If you’re flexible enough to do this you can expect to save up to 42% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from London Heathrow Airport to Ko Samui?

Use this chart to determine the cheapest time to fly round-trip from Heathrow to Ko Samui. Price data was last updated on March 30, 2025.

Travelers seeking maximum savings on their London Heathrow Airport to Ko Samui flight should consider departing on Thursday afternoons when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to Ko Samui trip
Airlines
Virgin Atlantic

Virgin's Upper Class includes lie-flat beds and a four-course meal.


Virgin's Economy Delight offers extra legroom, priority boarding, and checked bag included.

Read more about Virgin Atlanticby Blane Bachelor
British Airways

BA's Club Suite offers privacy with solo pods and a door you can close.


BA's World Traveller Plus offers extra seat width, legroom, and upgraded service.

Read more about British Airwaysby Gabriel Leigh
Our travel experts
Blane Bachelor

Blane Bachelor

Expert on Virgin Atlantic

Blane Bachelor

Blane Bachelor

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 Leigh

Gabriel Leigh

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

Reviews of airlines servicing Ko Samui

Get insights into the airlines that provide service to Ko Samui. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ko Samui. Reviews last updated October 30, 2025.
Read reviews from past customers who have flown EVA Air from London Heathrow Airport to Ko Samui. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,268 reviews

Food

8.1

Boarding

8.4

Comfort

8.3

Overall

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.
EVA Air
8.4
Very good
1,268 reviews
EVA Air
8.4
Very good
1,268 reviews

Food

8.1

Boarding

8.4

Comfort

8.3

Overall

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Ko Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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. 1 airline has 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 $1,029, Etihad Airways can have you in Ko Samui from London Heathrow Airport in 19h 25m. 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.

  • What is the cheapest airline to fly from London Heathrow Airport to Ko Samui round-trip?

    Our cheapest airline available from London Heathrow Airport to Ko Samui is EVA Air. Our recent data shows that you can find tickets from as low as $1,046 on this airline. EVA Air is priced at 14% lower than the current average price of a flight leaving 3 months from now.

  • 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, October is the cheapest month in which you can book a flight from London Heathrow Airport to Ko Samui (average of $689). Flying from London Heathrow Airport to Ko Samui in December is currently the most expensive (average of $1,115). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Heathrow to Ko Samui

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Suvarnabhumi flights
Gatwick to Suvarnabhumi flights
Heathrow to Phuket City flights

Top airline flying from Heathrow to Ko Samui

Discover the top airline that operate flights from Heathrow to Ko Samui. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest$1,046Average$1,138FlexibilityNo cancel feeOn-time74%

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