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Cheap flights from London Heathrow Airport to Ko Samui from £368

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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — USM
28 Jun — 5 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Ko Samui

Enter your travel dates to find the best prices.

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 29 May 2026.

Fri 4/911:45
LHR
-
USM
2 stops20h 00m
KLM
Mon 21/907:50
USM
-
LHR
2 stops19h 05m
KLM
Deal found 24/5£767
Sat 21/1116:25
LHR
-
USM
2 stops21h 40m
Multiple Airlines
Thu 3/1211:40
USM
-
LHR
2 stops27h 15m
Multiple Airlines
Deal found 25/5£768
Tue 24/1118:40
LHR
-
USM
2 stops19h 25m
SWISS
Thu 17/1210:00
USM
-
LHR
2 stops18h 40m
SWISS
Deal found 25/5£774
Sun 7/610:00
LHR
-
USM
2 stops22h 45m
Multiple Airlines
Wed 17/615:50
USM
-
LHR
2 stops21h 05m
Multiple Airlines
Deal found 24/5£774
Fri 20/1115:45
LHR
-
USM
2 stops22h 20m
Multiple Airlines
Fri 4/1208:30
USM
-
LHR
2 stops19h 55m
Multiple Airlines
Deal found 28/5£776
Wed 3/610:00
LHR
-
USM
2 stops20h 45m
Multiple Airlines
Sat 27/615:25
USM
-
LHR
2 stops21h 30m
Multiple Airlines
Deal found 26/5£777
Mon 8/620:45
LHR
-
USM
2 stops29h 30m
Etihad Airways
Mon 22/619:00
USM
-
LHR
2 stops26h 05m
Etihad Airways
Deal found 27/5£778
Sat 22/814:45
LHR
-
USM
2 stops23h 40m
Etihad Airways
Thu 24/920:50
USM
-
LHR
2 stops21h 55m
Etihad Airways
Deal found 27/5£780

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 29 May 2026.

Round-trip from

£767

One-way from

£368

Popular in

December

Cheapest in

November

Average price

£829
KLM
  • KLM
  • 4/9-21/9
  • 4 total stops
  • 39h 05m total
  • London to Ko Samui
Search Deals
12/9
  • 12/9
  • 2 total stops
  • 26h 30m total
  • London to Ko Samui
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£58 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£25 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 29 May 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 return flight

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sat 21/11

16:25-21:05

2 stops21h 40m

Ko Samui

Thu 3/12

07:55-20:50

2 stops19h 55m

£786

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Wed 23/9

20:50-11:15

2 stops32h 25m

Ko Samui

Fri 2/10

17:55-06:30

2 stops18h 35m

£828

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Wed 1/7

09:30-10:30

2 stops19h 00m

Ko Samui

Thu 16/7

17:55-08:00

2 stops20h 05m

£875

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Thu 2/7

09:30-10:30

2 stops19h 00m

Ko Samui

Mon 13/7

17:55-06:30

2 stops18h 35m

£875

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sat 13/6

15:05-16:55

2 stops19h 50m

Ko Samui

Fri 26/6

17:55-08:00

2 stops20h 05m

£897

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sat 21/11

10:40-18:50

1 stop25h 10m

Ko Samui

Thu 3/12

19:45-15:20

1 stop26h 35m

£908

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 30/6

20:50-20:30

2 stops17h 40m

Ko Samui

Wed 15/7

06:00-19:10

2 stops19h 10m

£917

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Fri 10/7

08:25-16:35

2 stops26h 10m

Ko Samui

Fri 17/7

06:00-19:10

2 stops19h 10m

£917

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 30/6

09:30-10:30

2 stops19h 00m

Ko Samui

Wed 15/7

17:55-08:00

2 stops20h 05m

£938

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 2/11

09:10-10:35

2 stops18h 25m

Ko Samui

Mon 23/11

14:05-07:10

2 stops24h 05m

£964

Flights are sorted by cheapest return flights first.

Deals found on 27/5

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 return 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 best time to book flights from London Heathrow Airport to Ko Samui is 1 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 £800). Flying from London Heathrow Airport to Ko Samui in December is currently the most expensive (average of £1,265). 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 for a return flight from London Heathrow Airport to Ko Samui?

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 29 May 2026.
Read through reviews of airlines operating flights from London Heathrow Airport to Ko Samui, such as EVA Air,Singapore Airlines, andThai Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.5
Very Good
1,460 reviews
Check prices

Boarding

8.4

Crew

8.7

Overall

8.5

Comfort

8.3

Food

8.1

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!
EVA Air
8.5
Very Good
1,460 reviews
EVA Air
8.5
Very Good
1,460 reviews
Check prices

Boarding

8.4

Crew

8.7

Overall

8.5

Comfort

8.3

Food

8.1

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!
Singapore Airlines
8.2
Very Good
1,525 reviews
EVA Air
8.5
Very Good
1,460 reviews
Check prices

Boarding

8.4

Crew

8.7

Overall

8.5

Comfort

8.3

Food

8.1

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!
Thai Airways
7.9
Good
402 reviews
EVA Air
8.5
Very Good
1,460 reviews
Check prices

Boarding

8.4

Crew

8.7

Overall

8.5

Comfort

8.3

Food

8.1

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!
Qatar Airways
7.4
Good
3,727 reviews
EVA Air
8.5
Very Good
1,460 reviews
Check prices

Boarding

8.4

Crew

8.7

Overall

8.5

Comfort

8.3

Food

8.1

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!
British Airways
6.7
Okay
8,008 reviews
EVA Air
8.5
Very Good
1,460 reviews
Check prices

Boarding

8.4

Crew

8.7

Overall

8.5

Comfort

8.3

Food

8.1

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!

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?

    Most people fly into Ko Samui (USM) if they book a flight to Ko Samui from London Heathrow. On average, Ko Samui has 0 inbound flights from London Heathrow per day from 12 airlines. Ko Samui is conveniently located just 2.1 mi from Ko Samui’s city center.

  • How long is the flight from London Heathrow Airport to Ko Samui?

    There are many flights that can get you from London Heathrow Airport to Ko Samui in 19h. Fly via KLM, Oman Air, or Qatar Airways to get the fastest option. London Heathrow Airport and Ko Samui are separated by a distance of 6144 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from London Heathrow Airport to Ko Samui round-trip?

    Currently priced at £114, Bangkok Airways will fly you from London Heathrow Airport to Ko Samui and back. In addition to Bangkok Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Austrian Airlines and Lufthansa - these airlines can fly you to your destination from £591 and £602, respectively. Bangkok Airways is currently priced 87% below the average price you’ll pay for this route.

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

    The cheapest airline one-way is EVA Air, with whom users have recently found tickets for as low as £474. However, be on the lookout for offers from Thai Airways and Singapore Airlines, as they are both options that can get you from London Heathrow Airport to Ko Samui for a low price.

  • Where are the most common stopover locations when flying from London Heathrow Airport to Ko Samui?

    The most popular stopover on flights from London Heathrow Airport to Ko Samui is Bangkok.

  • What are some popular things to do or see while on a stopover in Bangkok?

    Bangkok travellers tend to visit Pratunam, Siam Square, and Thailand Cultural Center more than anywhere else. Travelers on a layover in Bangkok can visit Pratunam, Siam Square, and Thailand Cultural Center, by traveling 14.8 mi, 15.1 mi, and 13.1 mi, respectively after landing at Bangkok Suvarnabhumi. Those looking to explore during their stopover in Bangkok can hire a car from Bangkok Suvarnabhumi for about £17 per day.

  • Where are the least popular stopover locations for London Heathrow Airport to Ko Samui flights?

    London Heathrow Airport to Ko Samui flights that have stopovers will least frequently stop in Singapore.

  • 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 holiday 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 £800). Flying from London Heathrow Airport to Ko Samui in December is currently the most expensive (average of £1,265). 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

Travelling to a place near Ko Samui?

Book flights to Ko Samui if you plan to visit one of these locations
Ko Pha Ngan
Ko Tao
Khanom

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from Heathrow to Ko Samui

Discover the top 10 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 858,174 searches. Data last updated 29 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Bangkok AirwaysCheapest£114Average£142FlexibilityNo cancel feeOn-time74%
Search Bangkok Airways flights
Austrian AirlinesCheapest£591Average£683FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
LufthansaCheapest£602Average£700FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
SWISSCheapest£606Average£694FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Etihad AirwaysCheapest£612Average£787FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
KLMCheapest£634Average£768FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£717Average£1,167FlexibilityNo cancel feeOn-time70%
Search British Airways flights
EVA AirCheapest£723Average£839FlexibilityNo cancel feeOn-time74%
Search EVA Air flights
Singapore AirlinesCheapest£744Average£922FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Qatar AirwaysCheapest£795Average£992FlexibilityNo cancel feeOn-time68%
Search Qatar Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Ko Samui?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Ko Samui. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Ko Samui?

Cheapflights simply makes it quick and affordable to book flights from Heathrow to Ko Samui by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Heathrow to Ko Samui with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Ko Samui, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Heathrow to Ko Samui become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Ko Samui from Heathrow today and book when prices fit your budget.

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