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Cheap flights from Ko Samui to London Heathrow Airport from ฿11,774

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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LHR
22 Jun — 29 Jun1
1 adult

Cheap flight deals from Ko Samui to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Ko Samui (USM) to Heathrow (LHR). 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 June 2025.

Round-trip from

฿33,895

One-way from

฿11,774

Popular in

January

Cheapest in

October

Average price

฿41,388
15/9-9/10
  • 15/9-9/10
  • 4 total stops
  • 42h 00m total
  • Ko Samui to London
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12/7
  • 12/7
  • 2 total stops
  • 33h 45m total
  • Ko Samui to London
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (฿192,972 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (฿74,879 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2025
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Find flight deals from Ko Samui to Heathrow

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

Mon 15/909:15USM - LHR
2 stops18h 30mMultiple Airlines
Thu 9/1015:00LHR - USM
2 stops23h 30mMultiple Airlines
Deal found 15/6฿33,895
Tue 22/708:20USM - LHR
1 stop28h 15mแควนตัสแอร์เวย์
Tue 12/820:50LHR - USM
1 stop39h 25mแควนตัสแอร์เวย์
Deal found 16/6฿40,090
Mon 15/907:00USM - LHR
1 stop18h 20mEVA Air
Thu 9/1021:35LHR - USM
1 stop17h 15mEVA Air
Deal found 15/6฿40,285
Sun 17/816:25USM - LHR
2 stops35h 20mสวิส อินเตอร์เนชั่นแนล แอร์ไลน์
Fri 5/920:05LHR - USM
2 stops43h 05mสวิส อินเตอร์เนชั่นแนล แอร์ไลน์
Deal found 17/6฿43,528
Mon 21/717:55USM - LHR
2 stops18h 30mQatar Airways
Wed 13/810:50LHR - USM
2 stops17h 20mQatar Airways
Deal found 16/6฿43,885
Wed 23/719:15USM - LHR
2 stops19h 30mออสเตรียนแอร์ไลน์
Wed 13/819:30LHR - USM
2 stops17h 25mออสเตรียนแอร์ไลน์
Deal found 16/6฿45,280
Wed 23/716:25USM - LHR
2 stops23h 30mลุฟท์ฮันซ่า
Tue 12/806:30LHR - USM
2 stops32h 40mลุฟท์ฮันซ่า
Deal found 16/6฿47,550
Tue 1/708:45USM - LHR
2 stops26h 55mCathay Pacific
Thu 10/717:00LHR - USM
1 stop19h 35mCathay Pacific
Deal found 17/6฿76,450

Cheapflights Fare Finder

Customise your flight search to find flights from Ko Samui to Heathrow 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 17,341 searches. Data last updated 17 June 2025.
Use the filters below to find and compare flights from Ko Samui to London Heathrow Airport that are best for you.

Fly from

Ko Samui

Fly to

Heathrow

Route

Depart

Return

Price

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 15/9

09:15-21:45

2 stops18h 30m

London Heathrow

Thu 9/10

15:00-20:30

2 stops23h 30m

฿33,895

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 22/7

08:20-06:35

1 stop28h 15m

London Heathrow

Tue 12/8

20:50-18:15

1 stop39h 25m

฿40,090

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 15/9

07:00-19:20

1 stop18h 20m

London Heathrow

Thu 9/10

21:35-20:50

1 stop17h 15m

฿40,285

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 17/8

16:25-21:45

2 stops35h 20m

London Heathrow

Fri 5/9

20:05-21:10

2 stops43h 05m

฿43,528

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 21/7

17:55-06:25

2 stops18h 30m

London Heathrow

Wed 13/8

10:50-10:10

2 stops17h 20m

฿43,885

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 23/7

19:15-08:45

2 stops19h 30m

London Heathrow

Wed 13/8

19:30-18:55

2 stops17h 25m

฿45,280

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 23/7

16:25-09:55

2 stops23h 30m

London Heathrow

Tue 12/8

06:30-21:10

2 stops32h 40m

฿47,550

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 1/7

08:45-05:40

2 stops26h 55m

London Heathrow

Thu 10/7

17:00-18:35

1 stop19h 35m

฿76,450

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 12/7

15:25-19:10

2 stops33h 45m

฿11,774

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 11/12

09:20-19:20

1 stop17h 00m

฿19,494

Flights are sorted by cheapest return flights first.

Deals found on 16/6

Showing 1-10 of 16 results
1
2

Best time to book a flight from Ko Samui to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Ko Samui 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 Ko Samui to London Heathrow Airport

Rainfall in Heathrow by month

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

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

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

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 17 June 2025.
EVA Air
8.4
Very Good
1,204 reviews
Check prices

Crew

8.6

Food

8.1

Boarding

8.4

Overall

8.4

Comfort

8.3

Entertainment

8.0

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
1,204 reviews
EVA Air
8.4
Very Good
1,204 reviews
Check prices

Crew

8.6

Food

8.1

Boarding

8.4

Overall

8.4

Comfort

8.3

Entertainment

8.0

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
Emirates
8.1
Very Good
3,268 reviews
EVA Air
8.4
Very Good
1,204 reviews
Check prices

Crew

8.6

Food

8.1

Boarding

8.4

Overall

8.4

Comfort

8.3

Entertainment

8.0

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
336 reviews
EVA Air
8.4
Very Good
1,204 reviews
Check prices

Crew

8.6

Food

8.1

Boarding

8.4

Overall

8.4

Comfort

8.3

Entertainment

8.0

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
ออสเตรียนแอร์ไลน์
7.6
Good
804 reviews
EVA Air
8.4
Very Good
1,204 reviews
Check prices

Crew

8.6

Food

8.1

Boarding

8.4

Overall

8.4

Comfort

8.3

Entertainment

8.0

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
Finnair
7.6
Good
1,292 reviews
EVA Air
8.4
Very Good
1,204 reviews
Check prices

Crew

8.6

Food

8.1

Boarding

8.4

Overall

8.4

Comfort

8.3

Entertainment

8.0

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 Ko Samui to Heathrow. 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 from for flights from Ko Samui to London Heathrow?

    Most people fly from Ko Samui (USM) if they book a flight from Ko Samui to London Heathrow. On average, Ko Samui has 0 outbound flights to London Heathrow per day from 0 airlines. Ko Samui is conveniently located just 3.3 km from Ko Samui’s city centre.

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

    Cheapflights users have booked flights from Ko Samui to London Heathrow Airport return from ฿40,090. Other airlines that can offer you cheap pricing are EVA Air, from ฿40,285, and สวิส อินเตอร์เนชั่นแนล แอร์ไลน์, from ฿43,528. แควนตัสแอร์เวย์ is currently priced 5% below the average price you’ll pay for this route.

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

    For one-way options, check prices for EVA Air. According to our data, you can fly for as low as ฿19,494. Users have also found prices from ฿20,759 and ฿28,413 on Qatar Airways and แควนตัสแอร์เวย์, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ko Samui to Heathrow 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 Ko Samui to London Heathrow Airport?

    Currently, December is the cheapest month in which you can book a flight from Ko Samui to London Heathrow Airport (average of ฿810). Flying from Ko Samui to London Heathrow Airport in July is currently the most expensive (average of ฿1,025). 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
Brentford
Waterlooville

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