Ko Samui

$597+ Cheap flights from Heathrow (LHR) to Ko Samui (USM)

LHR — USM
Dec 5 — Dec 121
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Cheap flight deals from Heathrow to Ko Samui

Cheapest flights from Heathrow to Ko Samui

Wed 11/2512:30 pm -
2 stops24h 05m
Fri 12/255:05 pm -
2 stops26h 00m
Deal found 10/31$957
Mon 11/309:00 pm -
2 stops30h 40m
Wed 12/1611:10 am -
2 stops26h 15m
Deal found 11/2$1,002
Sat 11/219:00 pm -
2 stops30h 40m
Thu 12/36:15 pm -
2 stops30h 15m
Deal found 11/3$1,005
Mon 11/239:20 pm -
1 stop15h 15m
Mon 12/78:40 am -
1 stop17h 25m
Deal found 10/31$1,057
Wed 11/119:35 pm -
1 stop15h 00m
Tue 11/179:10 pm -
2 stops27h 50m
Deal found 11/4$1,094
Tue 11/246:25 am -
2 stops18h 10m
Thu 12/177:15 am -
2 stops20h 50m
Deal found 11/3$1,117
Tue 11/244:30 pm -
2 stops18h 55m
Thu 12/177:15 am -
2 stops20h 50m
Deal found 11/4$1,118
Sat 12/56:40 pm -
2 stops19h 25m
Sat 12/128:15 am -
2 stops20h 25m
Deal found 10/31$1,124
Mon 11/239:40 pm -
2 stops39h 45m
Mon 12/77:55 am -
2 stops29h 40m
Deal found 11/4$1,135
Tue 12/16:40 pm -
2 stops19h 25m
Tue 12/159:20 am -
2 stops19h 20m
Deal found 11/2$1,142

Find flight deals from Heathrow to Ko Samui

Most accurate provider

BudgetAir
2 stars

Most trusted provider

BudgetAir
3 stars

Round-trip from

$957
(Mytrip)

One-way from

$597
(FlightHub)

Popular in

December

Cheapest in

November

Average price

$1,094
Provider with most accurate pricing for London Heathrow-Ko Samui flight deals.
Provider most trusted by Cheapflights users for London Heathrow-Ko Samui flights.
From London Heathrow to Ko Samui
One-way flight from London Heathrow to Ko Samui
Highest demand for flights based on searches. 4% potential increase in price ($53 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($32 potential savings vs. average RT price).
Average for round-trip flights in November 2026

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

9:00 pm-7:45 am

2 stops27h 45m

Ko Samui

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$597

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Tue 12/15

8:50 pm-12:20 pm

3 stops32h 30m

Ko Samui

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$736

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Mon 1/11

9:40 pm-5:00 pm

2 stops36h 20m

Ko Samui

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$761

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Sun 1/10

8:05 pm-10:35 am

2 stops31h 30m

Ko Samui

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$776

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Thu 1/21

10:00 pm-10:40 am

2 stops29h 40m

Ko Samui

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$991

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Tue 5/4

7:30 pm-5:45 pm

2 stops16h 15m

Ko Samui

Wed 5/19

10:05 am-9:45 pm

2 stops17h 40m

$1,013

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Tue 5/4

7:30 pm-6:30 pm

2 stops17h 00m

Ko Samui

Mon 5/17

8:00 am-9:45 pm

2 stops19h 45m

$1,013
Quickest round-trip

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Sat 1/9

5:50 pm-7:35 pm

1 stop18h 45m

Ko Samui

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$1,026

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Sat 11/21

4:00 pm-5:00 pm

2 stops18h 00m

Ko Samui

Thu 12/3

9:10 pm-12:15 pm

2 stops22h 05m

$1,150

LondonKo Samui

LHR London Heathrow - USM Ko Samui

LHRUSM

London Heathrow

Tue 5/4

9:35 pm-6:30 pm

1 stop14h 55m

Ko Samui

Mon 5/17

7:45 pm-7:20 pm

1 stop29h 35m

$1,219

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/1

Showing 1-10 of 18 resultsSorted by cheapest first
1
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  • Most accurate provider: When it comes to deals on London Heathrow Airport-Ko Samui flights, users find the pricing of BudgetAir to be most consistent on Cheapflights vs. BudgetAir Users can find the same prices on London Heathrow Airport-Ko Samui flight deals on Cheapflights vs. BudgetAir 90-95% 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 BudgetAir the most. BudgetAir 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 88 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 $1,094). Flying from London Heathrow Airport to Ko Samui in December is currently the most expensive (average of $1,622). 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 typical for this route at the moment.

London Heathrow Airport to Ko Samui flights typically cost between $928 and $1,250 in November.
The cheapest round-trip price found within the last 5 days was $957 on Multiple Airlines (Nov 25-Dec 25).

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.

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.

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 $1,197, Qatar Airways can have you in Ko Samui from London Heathrow Airport in 17h 15m. 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 $1,094). Flying from London Heathrow Airport to Ko Samui in December is currently the most expensive (average of $1,622). 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

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