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Ko Samui

$600+ 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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — USM
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from London Heathrow to Ko Samui are usually found in May or September, booked 32 days in advance, depart on a Friday or Wednesday and return on a Wednesday

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 September 11, 2025.

Round-trip from

$946
(Austrian Airlines)

One-way from

$600
(FlightHub)

Popular in

December

Cheapest in

May

Average price

$1,065
From London Heathrow to Ko Samui
Search Deals
One-way flight from London Heathrow to Ko Samui
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Highest demand for flights based on searches. 8% potential increase in price ($118 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($43 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 11, 2025.

This Lufthansa deal was found by Cheapflights users on 9/11. 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.
Mon 11/106:40 pmLHR - USM
2 stops19h 25mSWISS
Tue 11/2510:00 amUSM - LHR
2 stops18h 40mSWISS
Deal found 9/11$954
This KLM deal was found by Cheapflights users on 9/9. 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.
Thu 9/182:45 pmLHR - USM
2 stops21h 30mMultiple Airlines
Mon 9/298:45 amUSM - LHR
2 stops18h 40mMultiple Airlines
Deal found 9/9$959
This KLM deal was found by Cheapflights users on 9/11. 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.
Thu 9/182:45 pmLHR - USM
2 stops21h 30mKLM
Mon 9/298:00 amUSM - LHR
2 stops18h 55mKLM
Deal found 9/11$995
This Lufthansa deal was found by Cheapflights users on 9/11. 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.
Tue 11/117:25 pmLHR - USM
2 stops16h 30mMultiple Airlines
Mon 11/248:15 amUSM - LHR
2 stops20h 25mMultiple Airlines
Deal found 9/11$997
This Lufthansa deal was found by Cheapflights users on 9/11. 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.
Mon 11/106:40 pmLHR - USM
2 stops19h 25mSWISS
Mon 11/248:15 amUSM - LHR
2 stops20h 25mSWISS
Deal found 9/11$1,008
This Trip.com deal was found by Cheapflights users on 9/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/259:35 pmLHR - USM
2 stops39h 15mMultiple Airlines
Wed 12/311:30 pmUSM - LHR
2 stops37h 10mMultiple Airlines
Deal found 9/9$1,015
This SWISS deal was found by Cheapflights users on 9/9. 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.
Tue 10/216:40 pmLHR - USM
2 stops20h 30mSWISS
Tue 11/410:00 amUSM - LHR
2 stops18h 40mSWISS
Deal found 9/9$1,052
This Lufthansa deal was found by Cheapflights users on 9/11. 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.
Tue 11/46:40 pmLHR - USM
2 stops19h 25mSWISS
Fri 11/2110:00 amUSM - LHR
2 stops18h 40mSWISS
Deal found 9/11$1,064
This Lufthansa deal was found by Cheapflights users on 9/11. 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.
Tue 11/46:40 pmLHR - USM
2 stops19h 25mSWISS
Sun 11/234:25 pmUSM - LHR
2 stops22h 40mSWISS
Deal found 9/11$1,073
This Gulf Air deal was found by Cheapflights users on 9/11. 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 Gulf Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/69:30 amLHR - USM
2 stops23h 10mGulf Air
Thu 11/203:35 pmUSM - LHR
2 stops30h 10mGulf Air
Deal found 9/11$1,074
This Lufthansa deal was found by Cheapflights users on 9/11. 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 11/122:50 pmLHR - USM
2 stops17h 45mMultiple Airlines
Mon 11/248:15 amUSM - LHR
2 stops20h 25mMultiple Airlines
Deal found 9/11$1,075

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 September 11, 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 3/5

9:05 am-6:55 pm

2 stops26h 50m

Ko Samui

Sat 3/21

10:00 am-9:40 pm

2 stops18h 40m

$946

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Fri 3/6

7:25 pm-6:40 pm

2 stops16h 15m

Ko Samui

Sat 3/21

9:20 am-9:40 pm

2 stops19h 20m

$946

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Thu 3/5

7:25 pm-6:55 pm

2 stops16h 30m

Ko Samui

Thu 3/19

4:25 pm-8:05 am

2 stops22h 40m

$953

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 11/4

6:40 pm-9:05 pm

2 stops19h 25m

Ko Samui

Fri 11/21

10:00 am-9:40 pm

2 stops18h 40m

$1,064

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Wed 11/5

1:50 pm-5:30 pm

2 stops20h 40m

Ko Samui

Mon 11/24

4:30 pm-6:15 am

2 stops20h 45m

$1,109

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Thu 11/6

3:30 pm-5:30 pm

2 stops19h 00m

Ko Samui

Mon 11/24

5:05 pm-6:25 am

2 stops20h 20m

$1,109

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Thu 11/13

8:35 am-10:35 am

2 stops19h 00m

Ko Samui

Tue 11/25

6:15 pm-12:10 pm

2 stops24h 55m

$1,109

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Thu 10/9

9:30 am-9:35 pm

2 stops30h 05m

Ko Samui

Tue 11/4

6:15 pm-2:30 pm

2 stops27h 15m

$1,127

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 10/13

9:45 pm-7:20 am

2 stops27h 35m

Ko Samui

Mon 11/10

7:00 pm-2:30 pm

2 stops26h 30m

$1,147

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sun 10/12

9:45 pm-7:35 am

2 stops27h 50m

Ko Samui

Thu 11/6

1:25 pm-6:40 am

2 stops24h 15m

$1,153

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 18 results
1
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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

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 August 29, 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 32 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 September 11, 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 43% 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.

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 September 11, 2025.
Read reviews from past customers who have flown EVA Air and Thai Airways 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
1,236 reviews

Crew

8.6

Overall

8.4

Entertainment

8.0

Comfort

8.3

Food

8.1

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very good
1,236 reviews
EVA Air
8.4
Very good
1,236 reviews

Crew

8.6

Overall

8.4

Entertainment

8.0

Comfort

8.3

Food

8.1

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Thai Airways
7.8
Good
350 reviews
EVA Air
8.4
Very good
1,236 reviews

Crew

8.6

Overall

8.4

Entertainment

8.0

Comfort

8.3

Food

8.1

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

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. 2 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 $1,064, Austrian Airlines 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 are the cheapest airlines flying 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 $1,049 on this airline. An additional option worth looking into is Thai Airways, starting at $1,111. EVA Air is priced at 14% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from London Heathrow Airport to Ko Samui one-way?

    One-way options have recently been found by users for as low as $600 on Austrian Airlines. Other airlines that offer cheap prices include Etihad Airways from $692 and EVA Air from $755 one-way.

  • 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.

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 2 airlines flying from Heathrow to Ko Samui

Discover the top 2 airlines 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest$1,049Average$1,157FlexibilityNo cancel feeOn-time74%
Thai AirwaysCheapest$1,111Average$1,334FlexibilityNo cancel feeOn-time77%

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