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Cheap flights from London Heathrow Airport to Koh Samui from £464

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 30/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — USM
26 Feb — 5 Mar1
1 adult

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 Thursday and return on a Friday

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 21 February 2025.

Round-trip from

£798

One-way from

£464

Popular in

December

Cheapest in

September

Average price

£887
Etihad Airways
  • Etihad Airways
  • 1/4-11/4
  • 4 total stops
  • 50h 55m total
  • London to Koh Samui
Search Deals
Etihad Airways
  • Etihad Airways
  • 30/4
  • 2 total stops
  • 35h 30m total
  • London to Koh Samui
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£50 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2025
Search Deals

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 21 February 2025.

Tue 1/420:55LHR - USM
2 stops31h 35mEtihad Airways
Fri 11/417:25USM - LHR
2 stops19h 20mEtihad Airways
Deal found 19/2£798
Sat 1/320:05LHR - USM
2 stops17h 40mOman Air
Sat 8/317:40USM - LHR
2 stops31h 45mOman Air
Deal found 20/2£802
Wed 12/310:55LHR - USM
1 stop24h 35mMultiple Airlines
Mon 12/517:55USM - LHR
2 stops31h 15mMultiple Airlines
Deal found 20/2£814
Mon 28/421:35LHR - USM
1 stop17h 10mEVA Air
Mon 26/509:15USM - LHR
1 stop16h 05mEVA Air
Deal found 20/2£820
Mon 1/1211:50LHR - USM
1 stop36h 20mThai Airways
Sun 7/1207:00USM - LHR
1 stop19h 35mThai Airways
Deal found 21/2£848
Mon 24/210:55LHR - USM
1 stop24h 35mSingapore Airlines
Fri 4/408:45USM - LHR
1 stop37h 00mSingapore Airlines
Deal found 20/2£869
Wed 3/1211:30LHR - USM
2 stops26h 35mAir France
Tue 9/1211:40USM - LHR
2 stops29h 50mAir France
Deal found 20/2£878
Tue 20/512:10LHR - USM
2 stops18h 35mSWISS
Tue 3/609:15USM - LHR
2 stops18h 30mSWISS
Deal found 20/2£901
Sun 30/1116:00LHR - USM
2 stops16h 40mQatar Airways
Mon 8/1218:15USM - LHR
2 stops24h 55mQatar Airways
Deal found 20/2£951
Mon 26/518:20LHR - USM
1 stop18h 15mCathay Pacific
Thu 5/607:00USM - LHR
2 stops29h 20mCathay Pacific
Deal found 20/2£966
Sun 30/1113:40LHR - USM
2 stops20h 20mEmirates
Sun 7/1216:25USM - LHR
2 stops21h 45mEmirates
Deal found 20/2£985
Thu 8/519:30LHR - USM
2 stops17h 00mAustrian Airlines
Thu 22/519:30USM - LHR
2 stops18h 50mAustrian Airlines
Deal found 20/2£1,035

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 21 February 2025.

Fly from

Heathrow

Fly to

Koh Samui

Route

Depart

Return

Price

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

Tue 1/4

20:55-10:30

2 stops31h 35m

Ko Samui

Fri 11/4

17:25-06:45

2 stops19h 20m

£798

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

Wed 12/3

10:55-18:30

1 stop24h 35m

Ko Samui

Mon 12/5

17:55-19:10

2 stops31h 15m

£814

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

Mon 28/4

21:35-20:45

1 stop17h 10m

Ko Samui

Mon 26/5

09:15-19:20

1 stop16h 05m

£820

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

Tue 20/5

12:10-12:45

2 stops18h 35m

Ko Samui

Tue 3/6

09:15-21:45

2 stops18h 30m

£901

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

Thu 20/3

10:55-18:30

1 stop24h 35m

Ko Samui

Thu 27/3

08:55-15:35

1 stop37h 40m

£955

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

Mon 26/5

18:20-18:35

1 stop18h 15m

Ko Samui

Thu 5/6

07:00-06:20

2 stops29h 20m

£966

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

Thu 8/5

19:30-18:30

2 stops17h 00m

Ko Samui

Thu 22/5

19:30-08:20

2 stops18h 50m

£1,035

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

Thu 3/7

19:35-21:10

1 stop19h 35m

Ko Samui

Wed 16/7

16:25-06:30

1 stop20h 05m

£1,044

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

Thu 3/7

08:05-09:20

2 stops19h 15m

Ko Samui

Thu 17/7

17:55-07:30

2 stops19h 35m

£1,050

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

Sun 6/4

11:45-14:45

2 stops21h 00m

Ko Samui

Sun 13/4

10:55-09:00

2 stops28h 05m

£1,236

Flights are sorted by cheapest return flights first.

Deals found on 21/2

Showing 1-10 of 22 results
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2
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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 14 February 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 £1,594). 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 21 February 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 38% 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 February 2025.

Travellers seeking maximum savings on their London Heathrow Airport to Koh Samui flight should consider departing on Wednesday afternoons 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 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 21 February 2025.
Get a feel of what it's like to fly with EVA Air, Singapore Airlines and KLM 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
1,200 reviews
Check prices

Food

8.0

Crew

8.6

Overall

8.4

Entertainment

8.0

Comfort

8.2

Boarding

8.4

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

EVA Air
8.4
Very Good
1,200 reviews
EVA Air
8.4
Very Good
1,200 reviews
Check prices

Food

8.0

Crew

8.6

Overall

8.4

Entertainment

8.0

Comfort

8.2

Boarding

8.4

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Singapore Airlines
8.1
Very Good
1,299 reviews
EVA Air
8.4
Very Good
1,200 reviews
Check prices

Food

8.0

Crew

8.6

Overall

8.4

Entertainment

8.0

Comfort

8.2

Boarding

8.4

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

KLM
7.8
Good
1,333 reviews
EVA Air
8.4
Very Good
1,200 reviews
Check prices

Food

8.0

Crew

8.6

Overall

8.4

Entertainment

8.0

Comfort

8.2

Boarding

8.4

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Thai Airways
7.8
Good
317 reviews
EVA Air
8.4
Very Good
1,200 reviews
Check prices

Food

8.0

Crew

8.6

Overall

8.4

Entertainment

8.0

Comfort

8.2

Boarding

8.4

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

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 10 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 Etihad Airways. Our recent data shows that you can find tickets from as low as £798 on this airline. Additional options worth looking into are Oman Air and EVA Air, starting at £802 and £820 round-trip. Etihad Airways is currently priced 15% 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?

    £464 is the cheapest one-way deal found within the past few days, from Etihad Airways. You may also be able to find cheap deals on Gulf Air and EVA Air, with prices starting from £473 and £535, 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, Thailand Cultural Center, and Patpong Night Market. 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. Travellers can rent a car at Bangkok Suvarnabhumi for an average daily rate of £23 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 £1,594). 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.
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Stansted to Trat flights
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Gatwick to Chiang Rai flights
Luton to Chiang Mai flights
Gatwick to Khon Kaen flights
London City to Don Mueang Intl flights
Southend to Krabi flights

Top 10 airlines flying from Heathrow to Koh Samui

Discover the top 10 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 21 February 2025.
AirlineCheapestAverageFlexibilityOn-time
Bangkok AirwaysCheapest£106Average£172FlexibilityNo cancel feeOn-time74%
Search Bangkok Airways flights
Air FranceCheapest£635Average£783FlexibilityNo cancel feeOn-time77%
Search Air France flights
KLMCheapest£650Average£755FlexibilityNo cancel feeOn-time75%
Search KLM flights
Etihad AirwaysCheapest£662Average£734FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
EVA AirCheapest£757Average£851FlexibilityNo cancel feeOn-time74%
Search EVA Air flights
Singapore AirlinesCheapest£763Average£1,083FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Austrian AirlinesCheapest£772Average£920FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
British AirwaysCheapest£773Average£1,154FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Thai AirwaysCheapest£834Average£1,088FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights
Qatar AirwaysCheapest£852Average£1,114FlexibilityNo 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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