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Ko Samui

$590+ 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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — USM
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from London Heathrow to Ko Samui are usually found in September or May, booked 60 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 junio 12, 2025.

Round-trip from

$968
(Lufthansa)

One-way from

$590
(Lufthansa)

Popular in

December

Cheapest in

September

Average price

$1,101
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. 8% potential increase in price ($111 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This Lufthansa deal was found by Cheapflights users on 6/11. 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.
dom. 8/317:25 amLHR - USM
2 stops31h 45mLufthansa
vie. 9/124:25 pmUSM - LHR
2 stops29h 15mLufthansa
Deal found 6/11$968
This SWISS deal was found by Cheapflights users on 6/11. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/78:45 amLHR - USM
2 stops30h 25mSWISS
vie. 10/39:15 amUSM - LHR
2 stops18h 30mSWISS
Deal found 6/11$1,026
This British Airways deal was found by Cheapflights users on 6/12. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/29:20 pmLHR - USM
1 stop17h 50mBritish Airways
jue. 10/24:25 pmUSM - LHR
1 stop19h 00mBritish Airways
Deal found 6/12$1,029
This Austrian Airlines deal was found by Cheapflights users on 6/11. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/307:30 pmLHR - USM
2 stops17h 25mAustrian Airlines
sáb. 9/137:30 pmUSM - LHR
2 stops32h 10mAustrian Airlines
Deal found 6/11$1,038
This EVA Air deal was found by Cheapflights users on 6/11. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/309:35 pmLHR - USM
1 stop15h 20mEVA Air
sáb. 9/139:15 amUSM - LHR
1 stop16h 05mEVA Air
Deal found 6/11$1,186
This KLM deal was found by Cheapflights users on 6/10. 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.
mar. 6/105:10 pmLHR - USM
2 stops19h 05mKLM
vie. 6/208:00 amUSM - LHR
2 stops18h 55mKLM
Deal found 6/10$1,220
This Gulf Air deal was found by Cheapflights users on 6/11. 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.
mié. 7/1610:00 amLHR - USM
2 stops25h 45mGulf Air
jue. 8/710:05 amUSM - LHR
2 stops26h 50mGulf Air
Deal found 6/11$1,290
This Singapore Airlines deal was found by Cheapflights users on 6/12. 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.
vie. 10/3110:55 amLHR - USM
1 stop16h 55mSingapore Airlines
vie. 11/77:25 pmUSM - LHR
1 stop17h 30mSingapore Airlines
Deal found 6/12$1,335
This Qatar Airways deal was found by Cheapflights users on 6/12. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/63:35 pmLHR - USM
2 stops19h 30mQatar Airways
sáb. 9/132:30 pmUSM - LHR
2 stops21h 55mQatar Airways
Deal found 6/12$1,346
This Cathay Pacific deal was found by Cheapflights users on 6/11. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/1212:20 pmLHR - USM
1 stop24h 15mMultiple Airlines
mié. 6/2510:55 amUSM - LHR
2 stops37h 05mMultiple Airlines
Deal found 6/11$1,353
This Etihad Airways deal was found by Cheapflights users on 6/12. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/99:30 amLHR - USM
2 stops26h 45mEtihad Airways
mié. 9/101:30 pmUSM - LHR
2 stops23h 30mEtihad Airways
Deal found 6/12$1,361
This Cathay Pacific deal was found by Cheapflights users on 6/12. 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.
mié. 8/65:00 pmLHR - USM
1 stop19h 35mCathay Pacific
lun. 9/810:55 amUSM - LHR
1 stop24h 45mCathay Pacific
Deal found 6/12$1,741

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 junio 12, 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

dom. 8/31

7:25 am-9:10 pm

2 stops31h 45m

Ko Samui

vie. 9/12

4:25 pm-3:40 pm

2 stops29h 15m

$968

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

dom. 9/7

8:45 am-9:10 pm

2 stops30h 25m

Ko Samui

vie. 10/3

9:15 am-9:45 pm

2 stops18h 30m

$1,026

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

mar. 9/2

9:20 pm-9:10 pm

1 stop17h 50m

Ko Samui

jue. 10/2

4:25 pm-5:25 am

1 stop19h 00m

$1,029

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

sáb. 8/30

6:00 am-5:45 pm

2 stops29h 45m

Ko Samui

vie. 9/12

7:15 pm-8:20 am

2 stops19h 05m

$1,038

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

sáb. 8/30

9:35 pm-6:55 pm

1 stop15h 20m

Ko Samui

sáb. 9/13

9:15 am-7:20 pm

1 stop16h 05m

$1,186

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

mié. 7/16

10:00 am-5:45 pm

2 stops25h 45m

Ko Samui

jue. 8/7

10:05 am-6:55 am

2 stops26h 50m

$1,290

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

mié. 8/6

3:35 pm-5:05 pm

2 stops19h 30m

Ko Samui

sáb. 9/13

2:30 pm-6:25 am

2 stops21h 55m

$1,346

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

sáb. 8/9

9:30 am-6:15 pm

2 stops26h 45m

Ko Samui

vie. 9/12

2:30 pm-7:00 am

2 stops22h 30m

$1,353

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

sáb. 7/26

10:15 am-4:35 pm

3 stops24h 20m

Ko Samui

sáb. 8/2

5:55 pm-7:10 pm

2 stops31h 15m

$1,464

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

dom. 8/10

11:25 am-11:50 am

1 stop18h 25m

Ko Samui

sáb. 9/13

8:45 am-5:55 am

1 stop27h 10m

$1,646

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 18 results
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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 June 9, 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 60 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 junio 12, 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.

Rainfall in Ko Samui by month

Plan your trip to Ko Samui by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ko Samui ranges from 2.3 - 19.3 inches per month. November is typically the wettest month, when rainfall can reach 19.3 in. February is typically the driest time to visit Ko Samui when rainfall is around 2.3 in.

Temperature in Ko Samui by month

Plan your trip to Ko Samui by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ko Samui, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 80.6 F).

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 junio 12, 2025.
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Overall

8.4

Entertainment

8.0

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
1,202 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Overall

8.4

Entertainment

8.0

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
Singapore Airlines
8.1
Very good
1,302 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Overall

8.4

Entertainment

8.0

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
Austrian Airlines
7.6
Good
802 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Overall

8.4

Entertainment

8.0

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
Cathay Pacific
7.6
Good
892 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Overall

8.4

Entertainment

8.0

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
SWISS
7.5
Good
1,623 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Overall

8.4

Entertainment

8.0

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. 1 airline has flights to Ko Samui from London Heathrow on a regular basis.

  • 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 Lufthansa. Our recent data shows that you can find tickets from as low as $968 on this airline. Additional options worth looking into are SWISS and British Airways, starting at $1,026 and $1,029 round-trip. Lufthansa is priced at 20% 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 $590 on Lufthansa. Other airlines that offer cheap prices include Etihad Airways from $776 and EVA Air from $786 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ko Tao
Ko Pha Ngan

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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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest$1,049Average$1,135FlexibilityNo cancel feeOn-time74%

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