Find flights
When to book
FAQs

Cheap flights from Ko Samui to London from £329

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 20/6. Fares are subject to change and may not be available on all flights or dates of travel.
USM — LON
12 Jun — 19 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ko Samui to London

Enter your travel dates to find the best prices.

Cheapest flights from Ko Samui to London
Explore the most affordable flight options available from Ko Samui to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 May 2026.

Thu 18/611:25
USM
-
LHR
2 stops25h 35m
Multiple Airlines
Sat 27/614:45
LHR
-
USM
2 stops23h 40m
Multiple Airlines
Deal found 9/5£737
Thu 11/615:25
USM
-
LHR
2 stops29h 55m
Multiple Airlines
Thu 18/610:00
LHR
-
USM
2 stops20h 45m
Multiple Airlines
Deal found 12/5£763
Thu 3/907:50
USM
-
LGW
3 stops29h 15m
Multiple Airlines
Mon 21/910:25
LGW
-
USM
3 stops27h 20m
Multiple Airlines
Deal found 10/5£799
Mon 22/617:25
USM
-
LHR
2 stops19h 30m
Multiple Airlines
Mon 29/614:45
LHR
-
USM
2 stops24h 05m
Multiple Airlines
Deal found 8/5£814
Tue 15/915:25
USM
-
LHR
2 stops29h 55m
Gulf Air
Tue 6/1022:05
LHR
-
USM
2 stops34h 40m
Gulf Air
Deal found 9/5£829
Sat 12/915:50
USM
-
LGW
2 stops21h 05m
Multiple Airlines
Wed 30/910:40
LGW
-
USM
2 stops21h 05m
Multiple Airlines
Deal found 9/5£833
Fri 11/913:30
USM
-
LHR
2 stops31h 50m
Multiple Airlines
Wed 30/914:45
LHR
-
USM
2 stops23h 45m
Multiple Airlines
Deal found 9/5£851
Thu 11/613:30
USM
-
LGW
2 stops47h 50m
Qatar Airways
Thu 18/609:00
LGW
-
USM
2 stops43h 30m
Qatar Airways
Deal found 12/5£880
Sat 12/917:25
USM
-
LHR
2 stops19h 30m
Multiple Airlines
Thu 1/1014:45
LHR
-
USM
2 stops23h 45m
Multiple Airlines
Deal found 9/5£881
Thu 18/613:30
USM
-
LGW
2 stops47h 10m
Qatar Airways
Sat 27/609:00
LGW
-
USM
2 stops43h 30m
Qatar Airways
Deal found 9/5£898
Sat 12/914:30
USM
-
LGW
2 stops22h 10m
Qatar Airways
Mon 28/908:10
LGW
-
USM
2 stops20h 20m
Qatar Airways
Deal found 9/5£903
Sun 13/914:30
USM
-
LGW
2 stops22h 50m
Emirates
Mon 28/921:45
LGW
-
USM
2 stops17h 50m
Emirates
Deal found 9/5£918

Find flight deals from Ko Samui to London

Discover tips and strategies to find the most affordable flight options for your journey from Ko Samui (USM) to London (LON). 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 13 May 2026.

Round-trip from

£737

One-way from

£329
18/6-27/6
  • 18/6-27/6
  • 4 total stops
  • 49h 15m total
  • Ko Samui to London
Search Deals
20/6
  • 20/6
  • 2 total stops
  • 35h 35m total
  • Ko Samui to London
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ko Samui to London 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 13 May 2026.
Use the filters below to find and compare flights from Ko Samui to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Thu 3/9

07:50-07:05

3 stops29h 15m

London Gatwick

Mon 21/9

10:25-19:45

3 stops27h 20m

£799

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 15/9

15:50-15:20

2 stops29h 30m

London Heathrow

Tue 6/10

22:05-16:30

2 stops36h 25m

£819

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Mon 22/6

15:30-06:55

2 stops21h 25m

London Heathrow

Mon 29/6

14:45-20:50

2 stops24h 05m

£848

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Thu 11/6

13:30-07:20

2 stops47h 50m

London Gatwick

Thu 18/6

09:00-10:30

2 stops43h 30m

£880

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Tue 15/9

15:25-06:55

2 stops21h 30m

London Heathrow

Sat 3/10

22:05-13:45

2 stops33h 40m

£880

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Sat 12/9

11:25-06:40

2 stops25h 15m

London Gatwick

Thu 1/10

08:10-10:30

2 stops20h 20m

£903

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Tue 15/9

14:30-07:20

2 stops22h 50m

London Gatwick

Thu 1/10

21:45-21:35

2 stops17h 50m

£918

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Sun 13/9

14:30-07:20

2 stops22h 50m

London Gatwick

Thu 1/10

21:45-21:35

2 stops17h 50m

£918

Ko SamuiLondon

USM - LHR

USMLHR

Ko Samui

Thu 3/9

07:50-06:25

2 stops28h 35m

London Heathrow

Mon 21/9

10:50-15:10

2 stops22h 20m

£918

Ko SamuiLondon

USM - LGW

USMLGW

Ko Samui

Mon 14/9

17:55-06:40

2 stops18h 45m

London Gatwick

Wed 30/9

08:10-09:20

2 stops19h 10m

£927

Flights are sorted by cheapest return flights first.

Deals found on 10/5

Showing 1-10 of 47 resultsSorted by cheapest first
1
2
3
...
5

Best time to book a flight from Ko Samui to London

Have a flexible travel schedule? Discover the best time to fly to London 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
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Ko Samui to London. 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?

    If you book a flight to London from Ko Samui, you will be flying from Ko Samui, which is the city’s only airport. Ko Samui (USM) is located 2.1 mi from the center of Ko Samui. There are 0 flights from Ko Samui to London per day from 0 different airlines.

  • How long is the flight from Ko Samui to London?

    Gulf Air, Qatar Airways, and Emirates can get you from Ko Samui to London in just under 22h 50m. Your travel time can differ by up to 25h. Ko Samui and London are separated by a distance of 6138 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most popular routes from Ko Samui to London?

    When deciding which route to take from Ko Samui to London consider Ko Samui - London Gatwick, Ko Samui - London Heathrow or Ko Samui - London City as they are the most popular.

  • Can I find deals for flights from Ko Samui to London that include hotel bookings?

    Yes. In addition to deals on Ko Samui to London flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Ko Samui to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ko Samui to London.

  • Can I find deals for business class flights from Ko Samui to London?

    Yes. Cheapflights offers flight deals from Ko Samui to London 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?

Book flights to London if you plan to visit one of these locations
Milton Keynes
Hounslow
Croydon
Wembley
Luton
Gatwick
Slough
Ilford
Hayes
Brentford
Colchester
Romford
Watford
Kingston upon Thames
Eastbourne
Ipswich
Southend-on-Sea
Guildford
Southall
Chelmsford

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ko Samui to London. 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 London?

Cheapflights helps you find that perfect flight to London from Ko Samui by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Ko Samui to London with no change fees?

Yes! Cheapflights helps users easily find flights from Ko Samui to London with no change fees.

Can Cheapflights notify me if prices for flights from Ko Samui to London become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to London from Ko Samui today and book when prices fit your budget.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.