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Cheap flights from Ko Samui to London Heathrow Airport from ฿18,479

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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LHR
18 Jul — 25 Jul1
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 13 July 2025.

Round-trip from

฿27,378

One-way from

฿18,479

Popular in

January

Cheapest in

October

Average price

฿39,223
3/11-15/11
  • 3/11-15/11
  • 4 total stops
  • 52h 35m total
  • Ko Samui to London
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9/8
  • 9/8
  • 2 total stops
  • 29h 10m total
  • Ko Samui to London
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (฿247,660 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (฿72,821 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 13 July 2025.

Mon 3/1107:00USM - LHR
2 stops33h 35mMultiple Airlines
Sat 15/1106:00LHR - USM
2 stops19h 00mMultiple Airlines
Deal found 12/7฿27,378
Mon 10/1109:20USM - LHR
2 stops32h 55mสวิส อินเตอร์เนชั่นแนล แอร์ไลน์
Sat 22/1113:50LHR - USM
2 stops24h 15mสวิส อินเตอร์เนชั่นแนล แอร์ไลน์
Deal found 11/7฿31,197
Mon 3/1119:25USM - LHR
1 stop26h 55mSingapore Airlines
Sat 15/1122:05LHR - USM
1 stop26h 55mSingapore Airlines
Deal found 13/7฿38,802
Mon 6/1013:30USM - LHR
1 stop23h 05mแควนตัสแอร์เวย์
Sat 18/1020:50LHR - USM
1 stop18h 20mแควนตัสแอร์เวย์
Deal found 13/7฿39,190

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 13 July 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 3/11

07:00-09:35

2 stops33h 35m

London Heathrow

Sat 15/11

06:00-08:00

2 stops19h 00m

฿27,378

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 10/11

09:20-11:15

2 stops32h 55m

London Heathrow

Sat 22/11

13:50-21:05

2 stops24h 15m

฿31,197

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 3/11

19:25-15:20

1 stop26h 55m

London Heathrow

Sat 15/11

22:05-08:00

1 stop26h 55m

฿38,802

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 6/10

13:30-06:35

1 stop23h 05m

London Heathrow

Sat 18/10

20:50-21:10

1 stop18h 20m

฿39,190

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 9/8

08:20-07:30

2 stops29h 10m

฿18,479

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 9/8

16:25-13:15

2 stops26h 50m

฿20,453

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 9/8

18:55-19:20

1 stop30h 25m

฿26,440

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 2/9

13:30-06:35

1 stop23h 05m

฿27,637

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 24/8

13:30-05:25

1 stop21h 55m

฿29,547

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 8/8

19:00-15:15

2 stops26h 15m

฿62,038

Flights are sorted by cheapest return flights first.

Deals found on 13/7

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.

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 13 July 2025.
Get a feel of what it's like to fly with EVA Air, Singapore Airlines, andแควนตัสแอร์เวย์ from Ko Samui to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very Good
1,215 reviews
Check prices

Crew

8.6

Entertainment

8.0

Food

8.1

Overall

8.4

Boarding

8.4

Comfort

8.3

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
1,215 reviews
EVA Air
8.4
Very Good
1,215 reviews
Check prices

Crew

8.6

Entertainment

8.0

Food

8.1

Overall

8.4

Boarding

8.4

Comfort

8.3

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
1,326 reviews
EVA Air
8.4
Very Good
1,215 reviews
Check prices

Crew

8.6

Entertainment

8.0

Food

8.1

Overall

8.4

Boarding

8.4

Comfort

8.3

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
แควนตัสแอร์เวย์
7.5
Good
876 reviews
EVA Air
8.4
Very Good
1,215 reviews
Check prices

Crew

8.6

Entertainment

8.0

Food

8.1

Overall

8.4

Boarding

8.4

Comfort

8.3

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
สวิส อินเตอร์เนชั่นแนล แอร์ไลน์
7.5
Good
1,656 reviews
EVA Air
8.4
Very Good
1,215 reviews
Check prices

Crew

8.6

Entertainment

8.0

Food

8.1

Overall

8.4

Boarding

8.4

Comfort

8.3

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
Qatar Airways
7.4
Good
3,603 reviews
EVA Air
8.4
Very Good
1,215 reviews
Check prices

Crew

8.6

Entertainment

8.0

Food

8.1

Overall

8.4

Boarding

8.4

Comfort

8.3

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 ฿31,197. Other airlines that can offer you cheap pricing are Singapore Airlines, from ฿38,802, and แควนตัสแอร์เวย์, from ฿39,190. สวิส อินเตอร์เนชั่นแนล แอร์ไลน์ is currently priced 27% 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 Qatar Airways. According to our data, you can fly for as low as ฿20,453. Users have also found prices from ฿26,440 and ฿27,637 on EVA Air 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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