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Ko Samui

$632+ 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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — USM
Jun 3 — Jun 101
Wed 6/3
Wed 6/10
1 adult, Economy
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Cheap 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 May 4, 2026.

This Gotogate deal was found by Cheapflights users on 4/29. 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.
Wed 9/99:30 am
LHR
-
USM
2 stops17h 50m
Multiple Airlines
Fri 10/96:00 am
USM
-
LHR
2 stops36h 45m
Multiple Airlines
Deal found 4/29$1,030
This Lufthansa deal was found by Cheapflights users on 5/2. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/47:25 pm
LHR
-
USM
2 stops16h 30m
Multiple Airlines
Mon 11/168:15 am
USM
-
LHR
2 stops20h 25m
Multiple Airlines
Deal found 5/2$1,040
This FlightHub deal was found by Cheapflights users on 5/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/138:45 pm
LHR
-
USM
2 stops18h 50m
Etihad Airways
Sat 6/277:00 pm
USM
-
LHR
2 stops23h 45m
Etihad Airways
Deal found 5/1$1,042
This FlightHub deal was found by Cheapflights users on 5/4. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/59:45 pm
LHR
-
USM
2 stops30h 00m
Multiple Airlines
Sat 5/167:00 pm
USM
-
LHR
2 stops23h 45m
Multiple Airlines
Deal found 5/4$1,043
This SWISS deal was found by Cheapflights users on 5/2. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/69:00 am
LHR
-
USM
2 stops18h 40m
SWISS
Mon 11/168:15 am
USM
-
LHR
2 stops20h 25m
SWISS
Deal found 5/2$1,044
This Gotogate deal was found by Cheapflights users on 5/3. 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.
Sun 5/108:45 pm
LHR
-
USM
2 stops29h 30m
Multiple Airlines
Mon 5/186:00 am
USM
-
LHR
2 stops18h 45m
Multiple Airlines
Deal found 5/3$1,046
This KLM deal was found by Cheapflights users on 5/1. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/205:05 pm
LHR
-
USM
2 stops21h 00m
Multiple Airlines
Fri 12/48:30 am
USM
-
LHR
2 stops19h 55m
Multiple Airlines
Deal found 5/1$1,048
This Oman Air deal was found by Cheapflights users on 4/29. 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 Oman Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/218:25 am
LHR
-
USM
2 stops23h 30m
Oman Air
Sat 10/31:30 pm
USM
-
LHR
2 stops35h 40m
Oman Air
Deal found 4/29$1,053
This Lufthansa deal was found by Cheapflights users on 5/2. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/56:40 pm
LHR
-
USM
2 stops19h 25m
SWISS
Mon 11/168:15 am
USM
-
LHR
2 stops20h 25m
SWISS
Deal found 5/2$1,055
This FlightHub deal was found by Cheapflights users on 4/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/59:30 am
LHR
-
USM
2 stops20h 25m
Etihad Airways
Sat 5/167:00 pm
USM
-
LHR
2 stops23h 45m
Etihad Airways
Deal found 4/30$1,060
This FlightHub deal was found by Cheapflights users on 5/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/59:45 pm
LHR
-
USM
2 stops30h 00m
Multiple Airlines
Wed 5/207:00 pm
USM
-
LHR
2 stops26h 05m
Multiple Airlines
Deal found 5/1$1,061

Find 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 May 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,030
(Gotogate)

One-way from

$632
(Lufthansa)

Popular in

December

Cheapest in

June

Average price

$1,099
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 ($118 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($49 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
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 May 4, 2026.
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 - USM

LHRUSM

London Heathrow

Mon 9/21

8:25 am-1:55 pm

2 stops23h 30m

Ko Samui

Sat 10/3

1:30 pm-7:10 pm

2 stops35h 40m

$1,053

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sat 6/13

2:45 pm-5:05 pm

2 stops20h 20m

Ko Samui

Sat 6/27

7:00 pm-12:45 pm

2 stops23h 45m

$1,082

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Wed 5/27

9:30 am-10:45 am

2 stops19h 15m

Ko Samui

Thu 6/18

6:00 am-6:45 pm

2 stops18h 45m

$1,093

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 9/21

9:30 am-11:05 am

2 stops19h 35m

Ko Samui

Sun 10/4

6:00 am-6:45 pm

2 stops18h 45m

$1,106

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sat 5/16

3:35 pm-6:00 pm

2 stops20h 25m

Ko Samui

Sun 6/7

5:55 pm-6:25 am

2 stops18h 30m

$1,184

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sun 7/5

8:50 pm-10:45 am

2 stops31h 55m

Ko Samui

Tue 7/21

6:00 am-7:10 pm

2 stops19h 10m

$1,241
Quickest round-trip

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 9/1

9:25 am-7:45 am

1 stop16h 20m

Ko Samui

Tue 9/29

6:15 pm-5:55 am

1 stop17h 40m

$1,327

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 9/1

9:25 am-11:40 am

2 stops20h 15m

Ko Samui

Tue 9/29

4:25 pm-3:45 pm

1 stop29h 20m

$1,331
Cheapest one-way

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sun 8/30

1:50 pm-12:45 pm

2 stops16h 55m

$632

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 5/11

8:45 pm-9:35 pm

2 stops18h 50m

$644

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/1

Showing 1-10 of 14 resultsSorted by cheapest first
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 May.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy2 starsTrust Score*3 stars
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
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?

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 1 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, June is the cheapest month in which you can book a flight from London Heathrow Airport to Ko Samui (average of $1,075). Flying from London Heathrow Airport to Ko Samui in December is currently the most expensive (average of $1,748). 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?

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

AI-powered summary based on content written by travel experts. AI can make mistakes.
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

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. 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 $1,082, Oman Air can have you in Ko Samui from London Heathrow Airport in 20h 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, June is the cheapest month in which you can book a flight from London Heathrow Airport to Ko Samui (average of $1,075). Flying from London Heathrow Airport to Ko Samui in December is currently the most expensive (average of $1,748). 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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