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Cheap flights from Ko Samui to London Heathrow Airport from ฿10,624

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 7/5. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LHR
2 Mar — 9 Mar1
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 31 January 2026.

Sun 15/321:40
USM
-
LHR
2 stops26h 20m
Multiple Airlines
Sun 22/319:25
LHR
-
USM
2 stops17h 25m
Multiple Airlines
Deal found 29/1฿35,548
Thu 12/212:00
USM
-
LHR
2 stops33h 45m
Multiple Airlines
Thu 19/209:30
LHR
-
USM
2 stops26h 20m
Multiple Airlines
Deal found 30/1฿35,926
Sat 14/219:45
USM
-
LHR
2 stops33h 10m
Multiple Airlines
Tue 24/219:35
LHR
-
USM
3 stops29h 25m
Multiple Airlines
Deal found 29/1฿39,257
Sun 15/211:40
USM
-
LHR
2 stops26h 40m
Multiple Airlines
Tue 24/209:30
LHR
-
USM
2 stops20h 05m
Multiple Airlines
Deal found 29/1฿39,446
Mon 9/307:15
USM
-
LHR
1 stop18h 50m
EVA Air
Wed 11/321:20
LHR
-
USM
1 stop14h 20m
EVA Air
Deal found 30/1฿40,954
Sun 15/211:40
USM
-
LHR
2 stops26h 40m
Multiple Airlines
Mon 23/219:20
LHR
-
USM
2 stops29h 45m
Multiple Airlines
Deal found 29/1฿41,677

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 31 January 2026.

Round-trip from

฿35,548

One-way from

฿10,624
ออสเตรียนแอร์ไลน์
  • ออสเตรียนแอร์ไลน์
  • 15/3-22/3
  • 4 total stops
  • 43h 45m total
  • Ko Samui to London
Search Deals
7/5
  • 7/5
  • 3 total stops
  • 41h 40m 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 31 January 2026.
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

Thu 12/2

12:00-14:45

2 stops33h 45m

London Heathrow

Thu 19/2

09:30-18:50

2 stops26h 20m

฿35,926

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 9/3

07:15-19:05

1 stop18h 50m

London Heathrow

Wed 11/3

21:20-18:40

1 stop14h 20m

฿40,954

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 15/2

11:40-07:20

2 stops26h 40m

London Heathrow

Mon 23/2

19:20-08:05

2 stops29h 45m

฿41,677

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 23/7

15:25-18:20

2 stops32h 55m

London Heathrow

Sun 2/8

06:00-18:50

2 stops30h 50m

฿41,929

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 24/7

14:30-07:30

2 stops23h 00m

London Heathrow

Sun 2/8

12:30-07:10

2 stops36h 40m

฿42,777

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 13/2

17:40-05:55

2 stops43h 15m

London Heathrow

Wed 25/2

20:55-21:20

2 stops17h 25m

฿44,758

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 13/2

20:40-06:40

1 stop17h 00m

London Heathrow

Fri 27/2

10:00-20:25

2 stops27h 25m

฿44,820

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 9/3

17:40-06:15

2 stops19h 35m

London Heathrow

Wed 11/3

15:30-18:15

2 stops19h 45m

฿45,386

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 12/3

17:40-18:35

2 stops31h 55m

฿12,447

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 15/3

18:40-18:35

2 stops30h 55m

฿12,510

Flights are sorted by cheapest return flights first.

Deals found on 31/1

Showing 1-10 of 14 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.

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.

  • 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 18h 50m. EVA Air provides one of the quickest options available for as low as ฿40,954. Airlines will cover a distance of 9888 km.

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

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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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