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Cheap flights from Ko Samui to London Heathrow Airport from ฿14,805

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 22/9. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LHR
3 Sep — 10 Sep1
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 29 August 2025.

Round-trip from

฿34,717

One-way from

฿14,805

Popular in

January

Cheapest in

October

Average price

฿41,085
ออสเตรียนแอร์ไลน์
  • ออสเตรียนแอร์ไลน์
  • 12/10-19/10
  • 4 total stops
  • 43h 50m total
  • Ko Samui to London
Search Deals
22/9
  • 22/9
  • 3 total stops
  • 34h 10m total
  • Ko Samui to London
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (฿275,672 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (฿87,403 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 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 29 August 2025.

Sun 12/1009:15USM - LHR
2 stops18h 30mMultiple Airlines
Sun 19/1010:25LHR - USM
2 stops25h 20mMultiple Airlines
Deal found 28/8฿34,717

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 29 August 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

Sun 12/10

09:15-21:45

2 stops18h 30m

London Heathrow

Sun 19/10

10:25-17:45

2 stops25h 20m

฿34,717

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 22/9

12:30-16:40

3 stops34h 10m

฿14,805

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 15/1

08:55-12:10

2 stops34h 15m

฿15,645

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 22/9

08:45-06:55

2 stops28h 10m

฿15,872

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 8/10

17:40-19:55

3 stops32h 15m

฿16,163

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 14/9

08:45-18:45

3 stops40h 00m

฿16,421

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 13/1

13:25-19:50

2 stops37h 25m

฿17,682

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 22/9

08:00-07:15

1 stop29h 15m

฿18,846

Flights are sorted by cheapest return flights first.

Deals found on 29/8

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.

  • 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 ฿1,016). 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
Brentford
Waterlooville

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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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