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Cheap flights from Ko Samui to London Heathrow Airport from £248

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 28/5. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LHR
4 Mar — 11 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 2 February 2026.

Wed 18/319:00
USM
-
LHR
2 stops24h 05m
Etihad Airways
Wed 25/308:50
LHR
-
USM
2 stops18h 50m
Etihad Airways
Deal found 1/2£939
Mon 9/307:55
USM
-
LHR
1 stop18h 10m
EVA Air
Wed 11/321:20
LHR
-
USM
1 stop14h 20m
EVA Air
Deal found 1/2£948
Thu 23/715:25
USM
-
LHR
2 stops32h 55m
Multiple Airlines
Sun 2/806:00
LHR
-
USM
2 stops30h 50m
Multiple Airlines
Deal found 30/1£974
Wed 18/309:00
USM
-
LHR
1 stop17h 05m
Multiple Airlines
Wed 25/321:05
LHR
-
USM
2 stops30h 35m
Multiple Airlines
Deal found 1/2£976
Fri 24/714:30
USM
-
LHR
2 stops23h 00m
Multiple Airlines
Sun 2/812:30
LHR
-
USM
2 stops36h 40m
Multiple Airlines
Deal found 30/1£994
Mon 9/317:40
USM
-
LHR
2 stops19h 45m
Qatar Airways
Wed 11/308:30
LHR
-
USM
2 stops21h 35m
Qatar Airways
Deal found 1/2£1,049
Mon 9/313:25
USM
-
LHR
2 stops23h 00m
British Airways
Wed 11/321:00
LHR
-
USM
1 stop17h 05m
British Airways
Deal found 30/1£1,109

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 2 February 2026.

Round-trip from

£939

One-way from

£248
Etihad Airways
  • Etihad Airways
  • 18/3-25/3
  • 4 total stops
  • 42h 55m total
  • Ko Samui to London
Search Deals
28/5
  • 28/5
  • 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 858,174 searches. Data last updated 2 February 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

Wed 18/3

19:00-12:05

2 stops24h 05m

London Heathrow

Wed 25/3

08:50-10:40

2 stops18h 50m

£939

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 9/3

07:55-19:05

1 stop18h 10m

London Heathrow

Wed 11/3

21:20-18:40

1 stop14h 20m

£948

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

£974

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 18/3

09:00-19:05

1 stop17h 05m

London Heathrow

Wed 25/3

21:05-10:40

2 stops30h 35m

£976

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

£994

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 9/3

17:40-06:25

2 stops19h 45m

London Heathrow

Wed 11/3

08:30-13:05

2 stops21h 35m

£1,049

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 28/5

07:50-19:30

3 stops41h 40m

£248

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 12/3

17:40-18:35

2 stops31h 55m

£289

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 15/3

18:40-18:35

2 stops30h 55m

£291

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 10/3

09:20-16:20

3 stops38h 00m

£318

Flights are sorted by cheapest return flights first.

Deals found on 1/2

Showing 1-10 of 15 results
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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?

    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 18h 10m. Etihad Airways provides one of the quickest options available for as low as £948. 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.

  • 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
Milton Keynes
Croydon
Luton
Northampton
Wembley
Gatwick
Slough
Ilford
Hounslow
Brentford
Hayes
Colchester
Watford
Guildford
Swindon
Bedford
Chelmsford
Eastbourne
Crawley
Kingston upon Thames

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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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