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Cheap flights from London Heathrow Airport to Ko Samui from £347

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 15/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — USM
4 May — 11 May1
1 adult

Cheapflights Tip: The best prices from London Heathrow to Ko Samui are usually found in September or May, booked 5 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 29 April 2025.

Round-trip from

£732

One-way from

£347

Popular in

December

Cheapest in

September

Average price

£1,001
15/5-18/5
  • 15/5-18/5
  • 4 total stops
  • 47h 10m total
  • London to Ko Samui
Search Deals
15/6
  • 15/6
  • 3 total stops
  • 51h 05m total
  • London to Ko Samui
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£52 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 29 April 2025.

Thu 15/510:00LHR - USM
2 stops23h 45mMultiple Airlines
Sun 18/513:30USM - LHR
2 stops23h 25mMultiple Airlines
Deal found 28/4£732
Sun 5/1006:00LHR - USM
2 stops33h 10mSWISS
Sun 19/1016:25USM - LHR
2 stops30h 00mSWISS
Deal found 28/4£745
Tue 3/621:35LHR - USM
1 stop16h 55mEVA Air
Sun 8/608:45USM - LHR
1 stop16h 35mEVA Air
Deal found 28/4£785
Thu 12/610:25LHR - USM
2 stops25h 20mAustrian Airlines
Thu 19/619:15USM - LHR
2 stops19h 30mAustrian Airlines
Deal found 28/4£787
Thu 26/616:25LHR - USM
2 stops19h 20mLufthansa
Thu 10/716:25USM - LHR
2 stops22h 15mLufthansa
Deal found 28/4£802
Mon 26/522:15LHR - USM
2 stops27h 05mCathay Pacific
Thu 5/610:55USM - LHR
1 stop39h 40mCathay Pacific
Deal found 28/4£888
Sat 28/621:45LHR - USM
2 stops30h 45mEtihad Airways
Thu 10/719:00USM - LHR
2 stops23h 45mEtihad Airways
Deal found 28/4£909
Mon 30/613:45LHR - USM
2 stops21h 20mQatar Airways
Fri 11/714:30USM - LHR
2 stops23h 30mQatar Airways
Deal found 28/4£1,054
Thu 25/1210:00LHR - USM
2 stops20h 05mKLM
Thu 8/108:30USM - LHR
2 stops19h 20mKLM
Deal found 28/4£1,178
Mon 11/819:35LHR - USM
1 stop19h 35mBritish Airways
Mon 25/813:30USM - LHR
1 stop23h 00mBritish Airways
Deal found 28/4£1,201
Mon 29/1220:35LHR - USM
1 stop36h 40mSingapore Airlines
Sat 10/117:10USM - LHR
1 stop29h 10mSingapore Airlines
Deal found 28/4£1,222

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 April 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 15/5

10:00-15:45

2 stops23h 45m

Ko Samui

Sun 18/5

13:30-06:55

2 stops23h 25m

£732

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sun 5/10

06:00-21:10

2 stops33h 10m

Ko Samui

Sun 19/10

16:25-16:25

2 stops30h 00m

£745

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Wed 28/5

21:35-21:35

1 stop18h 00m

Ko Samui

Wed 4/6

08:00-19:20

1 stop17h 20m

£774

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Thu 12/6

10:25-17:45

2 stops25h 20m

Ko Samui

Thu 19/6

19:15-08:45

2 stops19h 30m

£787

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Thu 26/6

16:25-17:45

2 stops19h 20m

Ko Samui

Thu 10/7

16:25-08:40

2 stops22h 15m

£802

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 26/5

22:15-07:20

2 stops27h 05m

Ko Samui

Thu 5/6

10:55-20:35

1 stop39h 40m

£888

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sat 28/6

21:45-10:30

2 stops30h 45m

Ko Samui

Thu 10/7

19:00-12:45

2 stops23h 45m

£909

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 30/6

13:45-17:05

2 stops21h 20m

Ko Samui

Fri 11/7

14:30-08:00

2 stops23h 30m

£1,054

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 11/8

19:35-21:10

1 stop19h 35m

Ko Samui

Mon 25/8

13:30-06:30

1 stop23h 00m

£1,201

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sun 15/6

22:15-07:20

3 stops51h 05m

£347

Flights are sorted by cheapest return flights first.

Deals found on 28/4

Showing 1-10 of 16 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 25 April 2025.

The best time to book flights from London Heathrow Airport to Ko Samui is 5 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 £1,649). 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 29 April 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 29 April 2025.
EVA Air
8.4
Very Good
1,186 reviews
Check prices

Food

8.1

Crew

8.6

Overall

8.4

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
EVA Air
8.4
Very Good
1,186 reviews
EVA Air
8.4
Very Good
1,186 reviews
Check prices

Food

8.1

Crew

8.6

Overall

8.4

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Singapore Airlines
8.1
Very Good
1,292 reviews
EVA Air
8.4
Very Good
1,186 reviews
Check prices

Food

8.1

Crew

8.6

Overall

8.4

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Emirates
8.0
Very Good
3,213 reviews
EVA Air
8.4
Very Good
1,186 reviews
Check prices

Food

8.1

Crew

8.6

Overall

8.4

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
KLM
7.8
Good
1,333 reviews
EVA Air
8.4
Very Good
1,186 reviews
Check prices

Food

8.1

Crew

8.6

Overall

8.4

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Thai Airways
7.7
Good
325 reviews
EVA Air
8.4
Very Good
1,186 reviews
Check prices

Food

8.1

Crew

8.6

Overall

8.4

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop

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 9 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 £745, SWISS will fly you from London Heathrow Airport to Ko Samui and back. In addition to SWISS, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Austrian Airlines and EVA Air - these airlines can fly you to your destination from £773 and £774, respectively. SWISS is currently priced 17% 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 Etihad Airways, with whom users have recently found tickets for as low as £486. However, be on the lookout for offers from Qatar 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 Siam Square more than anywhere else. Travelers on a layover in Bangkok can visit Pratunam, Thailand Cultural Center, and Siam Square, by traveling 14.8 mi, 13.1 mi, and 15.1 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, 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 £1,649). 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
London City to Suvarnabhumi flights
Stansted to Suvarnabhumi flights
Luton to Suvarnabhumi flights
Heathrow to Phuket City flights
Gatwick to Phuket City flights
Stansted to Phuket City flights
London City to Phuket City flights
Heathrow to Don Mueang Intl flights
Gatwick to Don Mueang Intl flights
Luton to Phuket City flights
Gatwick to Ko Samui flights
London City to Ko Samui flights
Stansted to Ko Samui flights
Heathrow to Chiang Mai flights
Heathrow to Krabi flights
Gatwick to Krabi flights
Gatwick to Chiang Mai flights
London City to Chiang Mai flights
Stansted to Chiang Mai flights
Stansted to Krabi flights
Heathrow to Udon Thani flights
Gatwick to Rayong flights
Heathrow to Hat Yai flights
Luton to Ko Samui flights
Heathrow to Rayong flights
London City to Krabi flights
Heathrow to Chiang Rai flights
Gatwick to Chiang Rai flights
Southend to Suvarnabhumi flights
Gatwick to Surat Thani flights
Luton to Chiang Mai flights
Heathrow to Surat Thani flights
Gatwick to Trat flights
Gatwick to Khon Kaen flights
Luton to Krabi flights
Heathrow to Trat flights
Stansted to Trat flights
London City to Don Mueang Intl flights
Southend to Krabi flights

Top 9 airlines flying from Heathrow to Ko Samui

Discover the top 9 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 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest£600Average£834FlexibilityNo cancel feeOn-time77%
Search Air France flights
KLMCheapest£614Average£676FlexibilityNo cancel feeOn-time75%
Search KLM flights
Etihad AirwaysCheapest£641Average£710FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Austrian AirlinesCheapest£675Average£833FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
EVA AirCheapest£721Average£808FlexibilityNo cancel feeOn-time74%
Search EVA Air flights
British AirwaysCheapest£733Average£1,128FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Singapore AirlinesCheapest£733Average£1,010FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Thai AirwaysCheapest£786Average£1,026FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights
Qatar AirwaysCheapest£810Average£1,061FlexibilityNo 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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