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Cheap flights from London Heathrow Airport to Ko Samui from £364

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 26/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — USM
18 Jun — 25 Jun1
1 adult

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 Wednesday or Monday and return on a Friday

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 13 June 2025.

Round-trip from

£710

One-way from

£364

Popular in

December

Cheapest in

September

Average price

£810
7/9-20/9
  • 7/9-20/9
  • 4 total stops
  • 59h 00m total
  • London to Ko Samui
Search Deals
26/9
  • 26/9
  • 3 total stops
  • 40h 40m total
  • London to Ko Samui
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£60 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

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 13 June 2025.

Sun 31/807:25LHR - USM
2 stops31h 45mLufthansa
Fri 12/916:25USM - LHR
2 stops29h 15mLufthansa
Deal found 11/6£712
Tue 2/919:15LHR - USM
3 stops36h 30mSWISS
Wed 8/1008:45USM - LHR
3 stops29h 30mSWISS
Deal found 12/6£723
Thu 30/1020:35LHR - USM
1 stop28h 25mSingapore Airlines
Fri 7/1119:25USM - LHR
1 stop30h 45mSingapore Airlines
Deal found 12/6£738
Mon 3/1117:10LHR - USM
2 stops20h 55mMultiple Airlines
Mon 1/1220:20USM - LHR
2 stops18h 45mMultiple Airlines
Deal found 12/6£743
Fri 5/919:35LHR - USM
1 stop16h 40mBritish Airways
Wed 1/1013:30USM - LHR
1 stop21h 55mBritish Airways
Deal found 11/6£757
Sat 30/819:30LHR - USM
2 stops17h 25mAustrian Airlines
Sat 13/919:30USM - LHR
2 stops32h 10mAustrian Airlines
Deal found 11/6£764
Tue 7/1021:25LHR - USM
1 stop17h 25mThai Airways
Tue 28/1007:55USM - LHR
1 stop18h 40mThai Airways
Deal found 12/6£765
Mon 1/921:35LHR - USM
1 stop18h 00mEVA Air
Tue 16/908:00USM - LHR
1 stop17h 20mEVA Air
Deal found 11/6£811
Wed 2/709:30LHR - USM
2 stops21h 40mEtihad Airways
Mon 7/719:00USM - LHR
2 stops26h 15mEtihad Airways
Deal found 10/6£846
Wed 2/721:25LHR - USM
2 stops31h 05mQatar Airways
Mon 7/719:00USM - LHR
2 stops31h 25mQatar Airways
Deal found 11/6£880
Fri 26/922:15LHR - USM
2 stops27h 05mCathay Pacific
Sun 12/1010:55USM - LHR
1 stop24h 45mCathay Pacific
Deal found 11/6£900
Wed 16/710:00LHR - USM
2 stops25h 45mGulf Air
Thu 7/810:05USM - LHR
2 stops26h 50mGulf Air
Deal found 11/6£949

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 13 June 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

Sun 31/8

07:25-21:10

2 stops31h 45m

Ko Samui

Fri 12/9

16:25-15:40

2 stops29h 15m

£712

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 2/9

19:15-13:45

3 stops36h 30m

Ko Samui

Wed 8/10

08:45-08:15

3 stops29h 30m

£723

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Thu 30/10

20:35-08:00

1 stop28h 25m

Ko Samui

Fri 7/11

19:25-19:10

1 stop30h 45m

£738

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 3/11

17:10-21:05

2 stops20h 55m

Ko Samui

Mon 1/12

20:20-08:05

2 stops18h 45m

£743

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Fri 5/9

19:35-18:15

1 stop16h 40m

Ko Samui

Wed 1/10

13:30-05:25

1 stop21h 55m

£757

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sat 30/8

19:30-18:55

2 stops17h 25m

Ko Samui

Sat 13/9

19:30-21:40

2 stops32h 10m

£764

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 7/10

21:25-20:50

1 stop17h 25m

Ko Samui

Tue 28/10

07:55-19:35

1 stop18h 40m

£765

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 1/9

21:35-21:35

1 stop18h 00m

Ko Samui

Tue 16/9

08:00-19:20

1 stop17h 20m

£811

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Wed 2/7

09:30-13:10

2 stops21h 40m

Ko Samui

Mon 7/7

19:00-15:15

2 stops26h 15m

£846

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Wed 2/7

21:25-10:30

2 stops31h 05m

Ko Samui

Mon 7/7

19:00-20:25

2 stops31h 25m

£880

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Showing 1-10 of 19 results
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?

Use this chart to determine the optimal time to book a return flight from Heathrow to Ko Samui. Price data was last updated on 9 June 2025.

The best time to book flights from London Heathrow Airport to Ko Samui is 60 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, August is the cheapest month in which you can book a flight from London Heathrow Airport to Ko Samui (average of £1,019). Flying from London Heathrow Airport to Ko Samui in December is currently the most expensive (average of £1,667). 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.

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 13 June 2025.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Ko Samui at midday. If you’re flexible enough to do this you can expect to save up to 38% 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 return from Heathrow to Ko Samui. Price data was last updated on 30 March 2025.

Travellers seeking maximum savings on their London Heathrow Airport to Ko Samui flight should consider departing on Wednesday at midday when fares are most often at their lowest. Friday 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 58.0 - 490.0 inches per month. November is typically the wettest month, when rainfall can reach 490.0 mm. February is typically the driest time to visit Ko Samui when rainfall is around 58.0 mm.

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 29.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 27.0 C).

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 13 June 2025.
EVA Air
8.4
Very Good
1,202 reviews
Check prices

Entertainment

8.0

Crew

8.6

Overall

8.4

Comfort

8.3

Boarding

8.4

Food

8.1

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
Check prices

Entertainment

8.0

Crew

8.6

Overall

8.4

Comfort

8.3

Boarding

8.4

Food

8.1

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
1,304 reviews
EVA Air
8.4
Very Good
1,202 reviews
Check prices

Entertainment

8.0

Crew

8.6

Overall

8.4

Comfort

8.3

Boarding

8.4

Food

8.1

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
7.7
Good
335 reviews
EVA Air
8.4
Very Good
1,202 reviews
Check prices

Entertainment

8.0

Crew

8.6

Overall

8.4

Comfort

8.3

Boarding

8.4

Food

8.1

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
Check prices

Entertainment

8.0

Crew

8.6

Overall

8.4

Comfort

8.3

Boarding

8.4

Food

8.1

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
Check prices

Entertainment

8.0

Crew

8.6

Overall

8.4

Comfort

8.3

Boarding

8.4

Food

8.1

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?

    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 11 airlines. Ko Samui is conveniently located just 2.1 mi from Ko Samui’s city center.

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

    Currently priced at £712, Lufthansa will fly you from London Heathrow Airport to Ko Samui and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from SWISS and Singapore Airlines - these airlines can fly you to your destination from £723 and £738, respectively. Lufthansa is currently priced 20% 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 Lufthansa, with whom users have recently found tickets for as low as £434. However, be on the lookout for offers from Etihad Airways and EVA Air, 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, Thailand Cultural Center, and Patpong Night Market more than anywhere else. Travelers on a layover in Bangkok can visit Pratunam, Thailand Cultural Center, and Patpong Night Market, by traveling 14.8 mi, 13.1 mi, and 14.9 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 £21 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, August is the cheapest month in which you can book a flight from London Heathrow Airport to Ko Samui (average of £1,019). Flying from London Heathrow Airport to Ko Samui in December is currently the most expensive (average of £1,667). 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 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
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Gatwick to Phuket City flights
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Heathrow to Don Mueang Intl flights
Gatwick to Don Mueang Intl flights
Gatwick to Ko Samui flights
London City to Ko Samui flights
Luton to Phuket City flights
Stansted to Ko Samui flights
Heathrow to Krabi flights
Heathrow to Chiang Mai flights
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Gatwick to Krabi flights
Stansted to Krabi flights
Stansted to Chiang Mai flights
London City to Chiang Mai flights
London City to Krabi flights
Southend to Suvarnabhumi flights
Luton to Ko Samui flights
Heathrow to Udon Thani flights
Heathrow to Rayong flights
Gatwick to Rayong flights
Luton to Krabi flights
Gatwick to Khon Kaen flights
Luton to Chiang Mai flights
Heathrow to Trat flights
Heathrow to Hat Yai flights
Heathrow to Chiang Rai flights
Gatwick to Trat flights
Stansted to Trat flights
Heathrow to Surat Thani flights
Gatwick to Surat Thani flights
Gatwick to Chiang Rai flights
Southend to Krabi flights

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 13 June 2025.
AirlineCheapestAverageFlexibilityOn-time
Bangkok AirwaysCheapest£107Average£143FlexibilityNo cancel feeOn-time74%
Search Bangkok Airways flights
Air FranceCheapest£590Average£727FlexibilityNo cancel feeOn-time77%
Search Air France flights
KLMCheapest£604Average£667FlexibilityNo cancel feeOn-time75%
Search KLM flights
EmiratesCheapest£615Average£820FlexibilityNo cancel feeOn-time75%
Search Emirates flights
Etihad AirwaysCheapest£660Average£723FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Austrian AirlinesCheapest£663Average£819FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
EVA AirCheapest£714Average£802FlexibilityNo cancel feeOn-time74%
Search EVA Air flights
Singapore AirlinesCheapest£739Average£981FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Thai AirwaysCheapest£765Average£962FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights
British AirwaysCheapest£775Average£1,123FlexibilityNo cancel feeOn-time70%
Search British 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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