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Cheap flights from London Heathrow Airport to Koh Samui from £426

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 19/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — USM
22 janv. — 29 janv.1
1 adult

The best prices from London Heathrow to Ko Samui are usually found in September or October, booked 5 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap flight deals from Heathrow to Koh Samui

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Koh 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 17 janvier 2025.

Round-trip from

£844

One-way from

£426

Popular in

December

Cheapest in

September

Average price

£963
21/2-7/3
  • 21/2-7/3
  • 4 total stops
  • 54h 40m total
  • London to Koh Samui
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19/2
  • 19/2
  • 2 total stops
  • 36h 20m total
  • London to Koh Samui
Search Deals
High demand for flights, 7% potential price rise
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Best time to find cheap flights, 3% potential price drop
Search Deals
Average for round-trip flights in January 2025
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Find flight deals from Heathrow to Koh Samui

Cheapest flights from Heathrow to Koh Samui
Explore the most affordable flight options available from Heathrow to Koh Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 janvier 2025.

ven. 7/1121:20LHR - USM
1 stop16h 25mMultiple Airlines
dim. 16/1109:20USM - LHR
1 stop17h 00mMultiple Airlines
Deal found 16/1£843
mar. 27/521:35LHR - USM
1 stop16h 55mEVA Air
mer. 4/609:15USM - LHR
1 stop16h 10mEVA Air
Deal found 16/1£844
lun. 21/421:55LHR - USM
2 stops27h 25mEtihad Airways
jeu. 1/517:55USM - LHR
2 stops42h 50mEtihad Airways
Deal found 15/1£847
mer. 23/416:25LHR - USM
2 stops22h 45mLufthansa
mer. 7/516:25USM - LHR
2 stops32h 00mLufthansa
Deal found 15/1£854
lun. 20/1009:05LHR - USM
2 stops21h 40mEmirates
jeu. 6/1110:00USM - LHR
2 stops28h 10mEmirates
Deal found 16/1£886
ven. 23/521:25LHR - USM
1 stop18h 10mThai Airways
lun. 2/608:45USM - LHR
1 stop16h 25mThai Airways
Deal found 16/1£893
jeu. 23/110:55LHR - USM
1 stop24h 35mSingapore Airlines
mer. 29/119:25USM - LHR
1 stop27h 10mSingapore Airlines
Deal found 16/1£894
ven. 23/511:20LHR - USM
2 stops20h 25mTurkish Airlines
mar. 3/608:00USM - LHR
2 stops18h 50mTurkish Airlines
Deal found 16/1£931
mer. 21/506:00LHR - USM
2 stops29h 45mAustrian Airlines
lun. 2/619:15USM - LHR
2 stops19h 05mAustrian Airlines
Deal found 15/1£967
ven. 7/311:45LHR - USM
2 stops18h 20mKLM
lun. 24/311:40USM - LHR
2 stops28h 20mKLM
Deal found 16/1£968

Find flights from Heathrow to Koh Samui within your budget

Customise your flight search to find flights from Heathrow to Koh 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 17 janvier 2025.

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Fly to

Any airport

Route

Depart

Return

Price

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

mar. 27/5

21:35-20:30

1 stop16h 55m

Ko Samui

mer. 4/6

09:15-19:25

1 stop16h 10m

£844

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

ven. 21/2

09:30-18:30

2 stops26h 00m

Ko Samui

ven. 7/3

08:55-06:35

2 stops28h 40m

£844

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

dim. 25/5

09:30-21:10

2 stops29h 40m

Ko Samui

mar. 3/6

16:25-12:40

2 stops26h 15m

£848

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

mar. 20/5

18:40-21:10

2 stops20h 30m

Ko Samui

mar. 3/6

10:05-07:55

2 stops27h 50m

£856

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

jeu. 20/2

20:55-07:45

2 stops27h 50m

Ko Samui

jeu. 6/3

21:25-18:25

2 stops28h 00m

£861

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

lun. 10/2

10:55-18:30

1 stop24h 35m

Ko Samui

lun. 17/3

08:55-19:10

1 stop17h 15m

£874

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

ven. 23/5

21:25-20:30

1 stop17h 05m

Ko Samui

mer. 4/6

08:00-19:10

1 stop17h 10m

£893

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

ven. 23/5

11:20-13:45

2 stops20h 25m

Ko Samui

mar. 3/6

08:00-20:50

2 stops18h 50m

£931

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

mer. 12/2

15:30-19:35

2 stops21h 05m

Ko Samui

sam. 8/3

11:40-05:50

2 stops25h 10m

£961

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

sam. 24/5

22:15-12:45

2 stops32h 30m

Ko Samui

mer. 4/6

08:45-07:05

2 stops28h 20m

£966

Flights are sorted by cheapest return flights first.

Deals found on 16/1

Showing 1-10 of 19 results
1
2

Best time to book a flight from Heathrow to Koh Samui

Have a flexible travel schedule? Discover the best time to fly to Koh 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.

Travel insights for flights from Heathrow to Koh Samui

Get recent, data-driven insights about flights from Heathrow to Koh Samui including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from London Heathrow Airport to Koh Samui?

Use this chart to determine the optimal time to book a return flight from Heathrow to Koh Samui. Price data was last updated on 10 January 2025.

The best time to book flights from London Heathrow Airport to Koh 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 Koh Samui?

Currently, August is the cheapest month in which you can book a flight from London Heathrow Airport to Koh Samui (average of £1,019). Flying from London Heathrow Airport to Koh Samui in December is currently the most expensive (average of £1,669). 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 Koh Samui. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 janvier 2025.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Koh Samui at midday. If you’re flexible enough to do this you can expect to save up to 20% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from London Heathrow Airport to Koh Samui?

Use this chart to determine the cheapest time to fly return from Heathrow to Koh Samui. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London Heathrow Airport to Koh Samui flight should consider departing on Monday evenings when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Koh Samui by month

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

In terms of precipitation, rainfall in Koh 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 Koh Samui when rainfall is around 58.0 mm.

Temperature in Koh Samui by month

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

If weather is an important factor for your trip to Koh 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 Koh Samui

Get insights into the airlines that provide service to Koh 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 Koh Samui. Reviews last updated 17 janvier 2025.
Get a feel of what it's like to fly with EVA Air and Lufthansa from London to Koh Samui by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very Good
1,248 reviews
Check prices

Crew

8.6

Comfort

8.2

Food

8.0

Overall

8.4

Boarding

8.4

Entertainment

8.0

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

EVA Air
8.4
Very Good
1,248 reviews
EVA Air
8.4
Very Good
1,248 reviews
Check prices

Crew

8.6

Comfort

8.2

Food

8.0

Overall

8.4

Boarding

8.4

Entertainment

8.0

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

Emirates
8.1
Very Good
3,351 reviews
EVA Air
8.4
Very Good
1,248 reviews
Check prices

Crew

8.6

Comfort

8.2

Food

8.0

Overall

8.4

Boarding

8.4

Entertainment

8.0

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

Singapore Airlines
8.1
Very Good
1,327 reviews
EVA Air
8.4
Very Good
1,248 reviews
Check prices

Crew

8.6

Comfort

8.2

Food

8.0

Overall

8.4

Boarding

8.4

Entertainment

8.0

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

KLM
7.8
Good
1,339 reviews
EVA Air
8.4
Very Good
1,248 reviews
Check prices

Crew

8.6

Comfort

8.2

Food

8.0

Overall

8.4

Boarding

8.4

Entertainment

8.0

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

Thai Airways
7.8
Good
337 reviews
EVA Air
8.4
Very Good
1,248 reviews
Check prices

Crew

8.6

Comfort

8.2

Food

8.0

Overall

8.4

Boarding

8.4

Entertainment

8.0

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Koh 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 Koh Samui from London Heathrow?

    Most people fly into Ko Samui (USM) if they book a flight to Koh 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 Koh Samui’s city center.

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

    Our cheapest airline available from London Heathrow Airport to Koh Samui is EVA Air. Our recent data shows that you can find tickets from as low as £851 on this airline. Additional options worth looking into are Etihad Airways and Singapore Airlines, starting at £859 and £862 round-trip. EVA Air is currently priced 13% below the average price you’ll pay for this route.

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

    £535 is the cheapest one-way deal found within the past few days, from EVA Air. You may also be able to find cheap deals on Thai Airways and Singapore Airlines, with prices starting from £553 and £592, respectively.

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

    London Heathrow Airport to Koh Samui flights have a stopover in Bangkok most often.

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

    The majority of Bangkok visitors spend their time at Pratunam, Patpong Night Market, and Thailand Cultural Center. Travelers on a layover in Bangkok can visit Pratunam, Patpong Night Market, and Thailand Cultural Center, by traveling 14.8 mi, 14.9 mi, and 13.1 mi, respectively after landing at Bangkok Suvarnabhumi. Travellers can rent a car at Bangkok Suvarnabhumi for an average daily rate of £25 to make sightseeing during their stopover a little easier.

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

    The least popular stopover on flights from London Heathrow Airport to Koh Samui is Singapore.

  • Can I find deals for flights from Heathrow to Koh Samui that include hotel bookings?

    Yes. In addition to deals on Heathrow to Koh Samui flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Koh Samui?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Koh Samui.

  • Can I find deals for business class flights from Heathrow to Koh Samui?

    Yes. Cheapflights offers flight deals from Heathrow to Koh 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 Koh Samui?

    Currently, August is the cheapest month in which you can book a flight from London Heathrow Airport to Koh Samui (average of £1,019). Flying from London Heathrow Airport to Koh Samui in December is currently the most expensive (average of £1,669). 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 Koh 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
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London City to Phuket City flights
Stansted to Phuket City flights
Luton to Suvarnabhumi flights
Gatwick to Don Mueang Intl flights
Gatwick to Koh Samui flights
London City to Koh Samui flights
Stansted to Koh Samui flights
Heathrow to Krabi flights
Gatwick to Krabi flights
Stansted to Krabi flights
Luton to Phuket City flights
London City to Krabi flights
Heathrow to Chiang Mai flights
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London City to Chiang Mai flights
Stansted to Chiang Mai flights
Heathrow to Rayong flights
Gatwick to Rayong flights
Luton to Koh Samui flights
Heathrow to Trat flights
Heathrow to Surat Thani flights
Luton to Krabi flights
Heathrow to Chiang Rai flights
London City to Don Mueang Intl flights
Stansted to Trat flights
Gatwick to Trat flights
Southend to Suvarnabhumi flights
Gatwick to Surat Thani flights
Southend to Krabi flights
Heathrow to Hat Yai flights
Gatwick to Khon Kaen flights
Gatwick to Chiang Rai flights
Heathrow to Udon Thani flights

Top 9 airlines flying from Heathrow to Koh Samui

Discover the top 9 airlines that operate flights from Heathrow to Koh 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 17 janvier 2025.
AirlineCheapestAverageFlexibilityOn-time
Bangkok AirwaysCheapest£110Average£135FlexibilityNo cancel feeOn-time74%
Search Bangkok Airways flights
Air FranceCheapest£656Average£855FlexibilityNo cancel feeOn-time77%
Search Air France flights
KLMCheapest£671Average£816FlexibilityNo cancel feeOn-time75%
Search KLM flights
Etihad AirwaysCheapest£683Average£760FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Singapore AirlinesCheapest£762Average£1,117FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
EVA AirCheapest£781Average£885FlexibilityNo cancel feeOn-time74%
Search EVA Air flights
British AirwaysCheapest£795Average£1,186FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Thai AirwaysCheapest£864Average£1,113FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights
Qatar AirwaysCheapest£880Average£1,084FlexibilityNo 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 Koh Samui?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Koh 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 Koh Samui?

Cheapflights simply makes it quick and affordable to book flights from Heathrow to Koh 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 Koh 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 Koh 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 Koh Samui become cheaper?

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

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