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Cheap flights from Ko Samui to London Heathrow Airport from £270

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 19/5. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LHR
21 Apr — 28 Apr1
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 22 March 2026.

Wed 13/506:00
USM
-
LHR
2 stops18h 45m
Multiple Airlines
Wed 27/514:45
LHR
-
USM
2 stops24h 05m
Multiple Airlines
Deal found 18/3£767
Mon 4/515:25
USM
-
LHR
2 stops21h 30m
Multiple Airlines
Mon 11/521:20
LHR
-
USM
2 stops28h 55m
Multiple Airlines
Deal found 20/3£770
Tue 5/508:20
USM
-
LHR
2 stops28h 35m
Multiple Airlines
Tue 12/509:30
LHR
-
USM
2 stops19h 15m
Multiple Airlines
Deal found 21/3£778
Sun 3/506:00
USM
-
LHR
2 stops39h 05m
Multiple Airlines
Sun 10/514:40
LHR
-
USM
2 stops24h 55m
Multiple Airlines
Deal found 19/3£796
Thu 11/615:50
USM
-
LHR
2 stops21h 05m
Gulf Air
Mon 15/610:00
LHR
-
USM
2 stops21h 45m
Gulf Air
Deal found 18/3£845
Sun 19/406:55
USM
-
LHR
2 stops35h 50m
Multiple Airlines
Wed 29/416:15
LHR
-
USM
2 stops22h 15m
Multiple Airlines
Deal found 17/3£862
Sun 31/507:50
USM
-
LHR
2 stops35h 25m
Multiple Airlines
Tue 30/613:40
LHR
-
USM
2 stops25h 55m
Multiple Airlines
Deal found 17/3£878

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 22 March 2026.

Round-trip from

£767

One-way from

£270
13/5-27/5
  • 13/5-27/5
  • 4 total stops
  • 42h 50m total
  • Ko Samui to London
Search Deals
19/5
  • 19/5
  • 2 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 22 March 2026.
Use the filters below to find and compare flights from Ko Samui to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 5/5

08:20-06:55

2 stops28h 35m

London Heathrow

Tue 12/5

09:30-10:45

2 stops19h 15m

£778

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 3/5

06:00-15:05

2 stops39h 05m

London Heathrow

Sun 10/5

14:40-21:35

2 stops24h 55m

£796

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Wed 13/5

08:40-07:00

3 stops28h 20m

London Heathrow

Wed 27/5

09:30-17:20

3 stops25h 50m

£836

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 11/6

15:50-06:55

2 stops21h 05m

London Heathrow

Mon 15/6

10:00-13:45

2 stops21h 45m

£845

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sat 23/5

06:00-19:10

2 stops19h 10m

London Heathrow

Sat 6/6

20:50-20:30

2 stops17h 40m

£884

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 21/5

08:45-19:20

1 stop16h 35m

London Heathrow

Mon 25/5

21:35-21:35

1 stop18h 00m

£908

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 21/5

17:35-07:05

2 stops19h 30m

London Heathrow

Mon 25/5

14:25-16:55

2 stops20h 30m

£912
Fastest return journey

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 11/6

08:45-19:20

1 stop16h 35m

London Heathrow

Mon 15/6

21:35-20:30

1 stop16h 55m

£915
Cheapest one-way

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 7/5

06:00-19:30

3 stops43h 30m

£288

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 19/5

07:50-17:45

2 stops39h 55m

£302

Flights are sorted by cheapest return flights first.

Deals found on 18/3

Showing 1-10 of 17 resultsSorted by cheapest first
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?

    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 21h 05m. Gulf Air provides one of the quickest options available for as low as £845. The distance from Ko Samui to London Heathrow Airport is about 6144 mi.

  • 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
Wembley
Croydon
Northampton
Luton
Hounslow
Slough
Gatwick
Ilford
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Eastbourne
Romford
Ipswich
Swindon
Bedford

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

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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?

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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