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Cheap flights from Ko Samui to London Heathrow Airport from £309

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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LHR
5 Jun — 12 Jun1
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 6 May 2026.

Mon 15/606:00
USM
-
LHR
2 stops19h 10m
Oman Air
Mon 22/620:50
LHR
-
USM
2 stops35h 55m
Oman Air
Deal found 1/5£724
Wed 16/914:00
USM
-
LHR
2 stops46h 30m
Oman Air
Wed 7/1020:50
LHR
-
USM
2 stops33h 55m
Oman Air
Deal found 1/5£741
Thu 17/915:30
USM
-
LHR
2 stops21h 25m
Multiple Airlines
Sun 27/921:45
LHR
-
USM
2 stops28h 30m
Multiple Airlines
Deal found 5/5£774
Thu 18/615:30
USM
-
LHR
2 stops21h 25m
Multiple Airlines
Thu 25/620:50
LHR
-
USM
2 stops29h 25m
Multiple Airlines
Deal found 4/5£813
Tue 15/915:25
USM
-
LHR
2 stops21h 30m
Gulf Air
Tue 6/1022:05
LHR
-
USM
2 stops36h 25m
Gulf Air
Deal found 1/5£814
Fri 19/619:00
USM
-
LHR
2 stops22h 30m
Multiple Airlines
Fri 26/612:30
LHR
-
USM
2 stops22h 20m
Multiple Airlines
Deal found 5/5£818
Sun 26/713:30
USM
-
LHR
2 stops23h 00m
Oman Air
Sun 16/808:25
LHR
-
USM
2 stops20h 40m
Oman Air
Deal found 2/5£834
Tue 23/615:30
USM
-
LHR
2 stops21h 25m
Multiple Airlines
Tue 7/721:45
LHR
-
USM
2 stops27h 45m
Multiple Airlines
Deal found 3/5£842

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 6 May 2026.

Round-trip from

£724

One-way from

£309
Oman Air
  • Oman Air
  • 15/6-22/6
  • 4 total stops
  • 55h 05m total
  • Ko Samui to London
Search Deals
11/6
  • 11/6
  • 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 6 May 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

Mon 15/6

06:00-19:10

2 stops19h 10m

London Heathrow

Mon 22/6

20:50-14:45

2 stops35h 55m

£724

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 17/9

15:50-15:20

2 stops29h 30m

London Heathrow

Sun 27/9

21:45-08:15

2 stops28h 30m

£779

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 15/9

15:25-06:55

2 stops21h 30m

London Heathrow

Tue 6/10

22:05-16:30

2 stops36h 25m

£814

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 26/7

13:30-06:30

2 stops23h 00m

London Heathrow

Sun 16/8

08:25-11:05

2 stops20h 40m

£834

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 13/9

17:55-19:10

2 stops31h 15m

London Heathrow

Fri 2/10

08:25-20:30

2 stops30h 05m

£887
Fastest return journey

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 13/9

19:00-12:25

2 stops23h 25m

London Heathrow

Mon 28/9

20:40-21:35

2 stops18h 55m

£944

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 13/9

19:00-12:25

2 stops23h 25m

London Heathrow

Tue 29/9

19:50-21:35

2 stops19h 45m

£944

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 18/6

11:25-07:00

2 stops25h 35m

London Heathrow

Thu 25/6

14:45-08:15

3 stops35h 30m

£946
Cheapest one-way

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 26/5

15:25-06:55

2 stops21h 30m

£336

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Sun 31/5

15:25-19:10

2 stops33h 45m

£380

Flights are sorted by cheapest return flights first.

Deals found on 1/5

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 19h 10m. Oman Air provides one of the quickest options available for as low as £724. 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
Wembley
Croydon
Northampton
Hounslow
Luton
Gatwick
Ilford
Slough
Hayes
Brentford
Colchester
Romford
Watford
Kingston upon Thames
Eastbourne
Swindon
Ipswich
Southend-on-Sea
Guildford

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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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