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Cheap flights from Ko Samui to London Heathrow Airport from £239

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
17 Jan — 24 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 18 December 2025.

Thu 15/118:05USM - LHR
3 stops31h 05mMultiple Airlines
Thu 5/306:40LHR - USM
2 stops25h 30mMultiple Airlines
Deal found 16/12£790
Thu 15/113:25USM - LHR
2 stops24h 15mEtihad Airways
Thu 5/308:50LHR - USM
2 stops26h 25mEtihad Airways
Deal found 16/12£814
Sun 7/616:25USM - LHR
2 stops20h 40mEmirates
Wed 10/609:05LHR - USM
2 stops30h 05mEmirates
Deal found 15/12£897
Sun 7/609:15USM - LHR
1 stop16h 05mEVA Air
Wed 10/621:35LHR - USM
1 stop16h 55mEVA Air
Deal found 15/12£940
Fri 30/111:40USM - LHR
1 stop34h 20mCathay Pacific
Fri 6/216:50LHR - USM
1 stop19h 45mCathay Pacific
Deal found 16/12£950
Fri 30/113:35USM - LHR
2 stops28h 55mMultiple Airlines
Fri 6/222:00LHR - USM
2 stops26h 45mMultiple Airlines
Deal found 16/12£793

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 18 December 2025.

Round-trip from

£790

One-way from

£239
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 858,174 searches. Data last updated 18 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

£790

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

£793

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

£814

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

£897

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

£940

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Fri 30/1

11:40-15:00

1 stop34h 20m

London Heathrow

Fri 6/2

16:50-19:35

1 stop19h 45m

£950

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 24/12

21:30-21:40

2 stops31h 10m

£249

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 20/5

10:05-15:15

2 stops35h 10m

£274

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 29/1

08:15-06:40

2 stops29h 25m

£282

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 12/3

15:35-17:35

3 stops33h 00m

£330

Flights are sorted by cheapest return flights first.

Deals found on 17/12

Showing 1-10 of 16 results
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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.

Cheapflights Insights

Everything you need to know about your flight from Ko Samui to London Heathrow Airport

What is the cheapest time of day to fly from USM to LHR?

Find hourly flight availability from Ko Samui to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 December 2025.

It’s typically best to fly out from Ko Samui to London Heathrow Airport in the evening. Doing so could potentially save you 38% on the flight price compared to flying at midday, which is usually more expensive.

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?

    For a flight from Ko Samui to London Heathrow, you will be flying from Ko Samui. Ko Samui (USM) is just 2.1 mi from the center of the city. Ko Samui is the only Ko Samui airport and it handles 0 outbound flights to London Heathrow per day. 0 airlines have flights to London Heathrow from Ko Samui on a regular basis.

  • 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 20h 40m. Etihad Airways provides one of the quickest options available for as low as £897. The distance from Ko Samui to London Heathrow Airport is about 6144 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines to fly from Ko Samui to London Heathrow Airport one-way?

    £427 is the cheapest one-way deal found within the past few days, from Thai Airways. You may also be able to find cheap deals on Qatar Airways and EVA Air, with prices starting from £448 and £454, respectively.

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ko Samui to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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?

Need flexible booking options for your flight to Heathrow from Ko Samui? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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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