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Cheap flights from Ko Samui to London Heathrow Airport from ฿11,307

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 20/11. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LHR
16 Dec — 23 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 16 November 2025.

Tue 30/1207:55USM - LHR
2 stops20h 45mMultiple Airlines
Tue 6/121:00LHR - USM
2 stops28h 10mMultiple Airlines
Deal found 15/11฿43,930
Tue 30/1209:20USM - LHR
1 stop17h 15mThai Airways
Tue 6/121:35LHR - USM
1 stop15h 50mThai Airways
Deal found 15/11฿47,332

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 16 November 2025.

Round-trip from

฿43,930

One-way from

฿11,307

Popular in

January

Cheapest in

June

Average price

฿37,840
30/12-6/1
  • 30/12-6/1
  • 4 total stops
  • 48h 55m total
  • Ko Samui to London
Search Deals
เอทิฮัดแอร์เวย์
  • เอทิฮัดแอร์เวย์
  • 20/11
  • 2 total stops
  • 24h 15m total
  • Ko Samui to London
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (฿246,333 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (฿87,421 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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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 16 November 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

Tue 30/12

07:55-21:40

2 stops20h 45m

London Heathrow

Tue 6/1

21:00-08:10

2 stops28h 10m

฿43,930

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 30/12

09:20-19:35

1 stop17h 15m

London Heathrow

Tue 6/1

21:35-20:25

1 stop15h 50m

฿47,332

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 23/11

08:50-06:40

2 stops52h 50m

฿12,084

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 21/4

07:00-10:00

3 stops33h 00m

฿13,769

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 1/12

20:30-17:30

2 stops28h 00m

฿13,963

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 22/11

19:45-17:55

3 stops53h 10m

฿14,287

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 2/12

08:55-16:20

2 stops38h 25m

฿14,546

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 13/1

19:00-06:40

3 stops42h 40m

฿16,198

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 14/1

08:50-06:40

2 stops52h 50m

฿16,360

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 14/1

16:45-12:05

2 stops26h 20m

฿17,041

Flights are sorted by cheapest return flights first.

Deals found on 15/11

Showing 1-10 of 11 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 17h 15m. Thai Airways provides one of the quickest options available for as low as ฿47,332. 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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Can Cheapflights find flights from Ko Samui to Heathrow with no change fees?

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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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