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Cheap flights from Ko Samui to London Heathrow Airport from ฿10,069

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 20/5. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LHR
16 Jan — 23 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ko Samui to Heathrow

Enter your travel dates to find the best prices.

Best flights from Ko Samui to Heathrow
Discover carefully curated flight deals from Ko Samui to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 December 2025.

Thu 15/118:05USM - LHR
3 stops31h 05mMultiple Airlines
Thu 5/306:40LHR - USM
2 stops25h 30mMultiple Airlines
Deal found 16/12฿33,229
Thu 29/108:15USM - LHR
2 stops29h 25mเอทิฮัดแอร์เวย์
Thu 5/220:55LHR - USM
2 stops33h 10mเอทิฮัดแอร์เวย์
Deal found 15/12฿33,858
Thu 29/111:40USM - LHR
1 stop34h 20mCathay Pacific
Thu 5/211:00LHR - USM
1 stop25h 35mCathay Pacific
Deal found 15/12฿37,256
Sun 7/616:25USM - LHR
2 stops20h 40mEmirates
Wed 10/609:05LHR - USM
2 stops30h 05mEmirates
Deal found 15/12฿37,728
Sun 7/609:15USM - LHR
1 stop16h 05mEVA Air
Wed 10/621:35LHR - USM
1 stop16h 55mEVA Air
Deal found 15/12฿39,553
Fri 30/113:35USM - LHR
2 stops28h 55mMultiple Airlines
Fri 6/222:00LHR - USM
2 stops26h 45mMultiple Airlines
Deal found 16/12฿33,386
Thu 15/113:25USM - LHR
2 stops24h 15mเอทิฮัดแอร์เวย์
Thu 5/308:50LHR - USM
2 stops26h 25mเอทิฮัดแอร์เวย์
Deal found 16/12฿34,236
Thu 29/111:40USM - LHR
1 stop34h 20mMultiple Airlines
Thu 5/220:15LHR - USM
2 stops28h 30mMultiple Airlines
Deal found 15/12฿37,445

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 17 December 2025.

Round-trip from

฿33,229

One-way from

฿10,069
15/1-5/3
  • 15/1-5/3
  • 5 total stops
  • 56h 35m total
  • Ko Samui to London
Search Deals
20/5
  • 20/5
  • 3 total stops
  • 52h 30m 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 17 December 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

Thu 15/1

18:05-18:10

3 stops31h 05m

London Heathrow

Thu 5/3

06:40-15:10

2 stops25h 30m

฿33,229

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 30/1

13:35-11:30

2 stops28h 55m

London Heathrow

Fri 6/2

22:00-07:45

2 stops26h 45m

฿33,386

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 29/1

08:15-06:40

2 stops29h 25m

London Heathrow

Thu 5/2

20:55-13:05

2 stops33h 10m

฿33,858

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 15/1

13:25-06:40

2 stops24h 15m

London Heathrow

Thu 5/3

08:50-18:15

2 stops26h 25m

฿34,236

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 29/1

11:40-15:00

1 stop34h 20m

London Heathrow

Thu 5/2

11:00-19:35

1 stop25h 35m

฿37,256

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 29/1

11:40-15:00

1 stop34h 20m

London Heathrow

Thu 5/2

20:15-07:45

2 stops28h 30m

฿37,445

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 7/6

16:25-07:05

2 stops20h 40m

London Heathrow

Wed 10/6

09:05-21:10

2 stops30h 05m

฿37,728

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 7/6

09:15-19:20

1 stop16h 05m

London Heathrow

Wed 10/6

21:35-20:30

1 stop16h 55m

฿39,553

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 20/5

10:05-15:15

2 stops35h 10m

฿11,517

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 27/4

17:50-14:45

3 stops26h 55m

฿14,191

Flights are sorted by cheapest return flights first.

Deals found on 15/12

Showing 1-10 of 16 results
1
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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 29h 25m. เอทิฮัดแอร์เวย์ provides one of the quickest options available for as low as ฿33,858. Airlines will cover a distance of 9888 km. Both multi-stop and direct flights can be found to your destination and back.

  • 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?

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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