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Cheap flights from Ko Samui to London Heathrow Airport from ฿14,143

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 14/5. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LHR
3 May — 10 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ko Samui to Heathrow

Enter your travel dates to find the best prices.

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 3 April 2026.

Mon 25/506:00
USM
-
LHR
2 stops18h 45m
Multiple Airlines
Mon 8/609:30
LHR
-
USM
2 stops30h 05m
Multiple Airlines
Deal found 1/4฿22,048
Sun 17/506:00
USM
-
LHR
2 stops18h 45m
Multiple Airlines
Sun 24/514:45
LHR
-
USM
2 stops19h 45m
Multiple Airlines
Deal found 2/4฿24,498
Thu 14/508:40
USM
-
LHR
2 stops28h 20m
Multiple Airlines
Thu 21/509:30
LHR
-
USM
2 stops27h 20m
Multiple Airlines
Deal found 30/3฿30,475
Mon 20/408:00
USM
-
LHR
2 stops35h 30m
Multiple Airlines
Thu 28/514:45
LHR
-
USM
2 stops23h 40m
Multiple Airlines
Deal found 30/3฿36,387
Thu 16/415:25
USM
-
LHR
2 stops28h 05m
Multiple Airlines
Mon 25/514:45
LHR
-
USM
2 stops20h 10m
Multiple Airlines
Deal found 30/3฿37,008
Fri 1/519:45
USM
-
LHR
2 stops41h 10m
Multiple Airlines
Wed 27/515:30
LHR
-
USM
2 stops19h 25m
Multiple Airlines
Deal found 3/4฿37,563
Tue 28/415:25
USM
-
LHR
2 stops22h 10m
Qatar Airways
Wed 27/515:30
LHR
-
USM
2 stops19h 25m
Qatar Airways
Deal found 3/4฿38,674
Sat 16/506:00
USM
-
LHR
2 stops19h 10m
โอมานแอร์
Sat 23/508:25
LHR
-
USM
2 stops23h 20m
โอมานแอร์
Deal found 1/4฿39,000
Thu 19/1116:25
USM
-
LHR
2 stops26h 15m
Emirates
Mon 23/1113:40
LHR
-
USM
2 stops24h 25m
Emirates
Deal found 29/3฿39,033
Sat 2/515:20
USM
-
LHR
2 stops21h 10m
โอมานแอร์
Wed 27/520:50
LHR
-
USM
2 stops33h 55m
โอมานแอร์
Deal found 3/4฿39,131

Find 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 3 April 2026.

Round-trip from

฿22,048

One-way from

฿14,143
25/5-8/6
  • 25/5-8/6
  • 4 total stops
  • 48h 50m total
  • Ko Samui to London
Search Deals
14/5
  • 14/5
  • 3 total stops
  • 42h 35m total
  • Ko Samui to London
Search Deals

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 3 April 2026.
Use the filters below to find and compare flights from Ko Samui to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 25/5

06:00-18:45

2 stops18h 45m

London Heathrow

Mon 8/6

09:30-21:35

2 stops30h 05m

฿22,048
Fastest return journey

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 17/5

06:00-18:45

2 stops18h 45m

London Heathrow

Sun 24/5

14:45-16:30

2 stops19h 45m

฿24,498

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 29/4

15:25-08:00

2 stops22h 35m

London Heathrow

Wed 27/5

15:25-16:55

2 stops19h 30m

฿38,674

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 4/5

15:25-08:00

2 stops22h 35m

London Heathrow

Wed 27/5

15:25-16:55

2 stops19h 30m

฿38,674

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 30/4

14:30-07:35

2 stops23h 05m

London Heathrow

Wed 27/5

15:25-16:55

2 stops19h 30m

฿38,674

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 16/5

06:00-19:10

2 stops19h 10m

London Heathrow

Sat 23/5

08:25-13:45

2 stops23h 20m

฿39,000

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 2/5

15:20-06:30

2 stops21h 10m

London Heathrow

Wed 27/5

20:50-12:45

2 stops33h 55m

฿39,131

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 3/5

06:00-19:10

2 stops19h 10m

London Heathrow

Wed 27/5

20:50-16:35

2 stops37h 45m

฿39,131

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 25/7

13:30-06:25

2 stops22h 55m

London Heathrow

Fri 7/8

16:00-16:30

2 stops18h 30m

฿42,463
Cheapest one-way

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 19/5

13:30-06:55

2 stops23h 25m

฿15,058

Flights are sorted by cheapest return flights first.

Deals found on 29/3

Showing 1-10 of 19 resultsSorted by cheapest first
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.

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 3 April 2026.
Get a feel of what it's like to fly with EVA Air 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
8.5
Very Good
1,400 reviews
Check prices

Overall

8.5

Boarding

8.4

Crew

8.7

Entertainment

8.0

Food

8.1

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CRK - TPE

What about midnight snacks to add? Used to have that before..
EVA Air
8.5
Very Good
1,400 reviews
EVA Air
8.5
Very Good
1,400 reviews
Check prices

Overall

8.5

Boarding

8.4

Crew

8.7

Entertainment

8.0

Food

8.1

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CRK - TPE

What about midnight snacks to add? Used to have that before..

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 1 airline. Ko Samui is conveniently located just 3.3 km from Ko Samui’s city centre.

  • How long is the flight from Ko Samui to London Heathrow Airport?

    A quick flight from Ko Samui to London Heathrow Airport can take about 22h 35m. Qatar Airways provides one of the quickest options available for as low as ฿38,674. Airlines will cover a distance of 9888 km.

  • What is the cheapest airline to fly from Ko Samui to London Heathrow Airport round-trip?

    Cheapflights users have booked flights from Ko Samui to London Heathrow Airport return from ฿36,592.

  • 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.

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
Brentford
Waterlooville

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Top airline flying from Ko Samui to Heathrow

Discover the top airline that operate flights from Ko Samui to Heathrow. 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 17,341 searches. Data last updated 3 April 2026.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest฿36,592Average฿41,727FlexibilityNo cancel feeOn-time74%
Search EVA Air flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Ko Samui to Heathrow?

Cheapflights makes it easy to find Ko Samui to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Ko Samui to Heathrow?

Millions of users choose and trust Cheapflights to book the best flight deals from Ko Samui to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Ko Samui to Heathrow with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ko Samui to Heathrow flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Ko Samui to Heathrow become cheaper?

Yes, Cheapflights offers price alerts on Ko Samui to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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