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Cheap flights from London to Ko Samui from £347

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 25/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — USM
9 Jul — 16 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Ko Samui

Enter your travel dates to find the best prices.

Cheapest flights from London to Ko Samui
Explore the most affordable flight options available from London to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 June 2026.

Wed 14/1013:10
LCY
-
USM
2 stops17h 35m
SWISS
Wed 28/1016:25
USM
-
LCY
2 stops23h 15m
SWISS
Deal found 7/6£775
Wed 24/610:00
LHR
-
USM
2 stops20h 45m
Multiple Airlines
Tue 7/717:25
USM
-
LHR
2 stops19h 30m
Multiple Airlines
Deal found 7/6£776
Thu 18/609:00
LGW
-
USM
2 stops43h 30m
Qatar Airways
Sat 25/719:00
USM
-
LGW
2 stops41h 40m
Qatar Airways
Deal found 5/6£777
Thu 11/615:05
LHR
-
USM
2 stops19h 50m
Qatar Airways
Fri 19/617:55
USM
-
LHR
2 stops18h 30m
Qatar Airways
Deal found 7/6£777
Sat 13/614:45
LHR
-
USM
2 stops23h 40m
Multiple Airlines
Sat 20/608:00
USM
-
LHR
2 stops37h 05m
Multiple Airlines
Deal found 5/6£778
Sun 23/818:40
LHR
-
USM
2 stops20h 30m
SWISS
Wed 9/908:45
USM
-
LHR
2 stops29h 10m
SWISS
Deal found 6/6£779
Sun 1/1110:30
LGW
-
USM
2 stops24h 10m
Multiple Airlines
Sun 29/1119:10
USM
-
LGW
2 stops25h 50m
Multiple Airlines
Deal found 7/6£780
Thu 11/622:15
LGW
-
USM
1 stop16h 15m
British Airways
Fri 19/619:15
USM
-
LGW
1 stop16h 40m
British Airways
Deal found 7/6£780
Mon 29/610:00
LHR
-
USM
2 stops21h 45m
Multiple Airlines
Mon 13/715:50
USM
-
LHR
2 stops21h 05m
Multiple Airlines
Deal found 7/6£781
Sat 27/609:00
LGW
-
USM
2 stops43h 30m
Qatar Airways
Sat 11/717:55
USM
-
LGW
2 stops42h 45m
Qatar Airways
Deal found 8/6£782
Fri 11/913:10
LCY
-
USM
2 stops18h 35m
SWISS
Fri 25/909:15
USM
-
LCY
2 stops29h 10m
SWISS
Deal found 9/6£782
Wed 10/608:25
LHR
-
USM
2 stops27h 35m
Qatar Airways
Fri 19/615:25
USM
-
LHR
2 stops22h 35m
Qatar Airways
Deal found 5/6£782

Find flight deals from London to Ko Samui

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Ko Samui (USM). 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 9 June 2026.

Round-trip from

£775

One-way from

£347

Popular in

December

Cheapest in

November

Average price

£823
SWISS
  • SWISS
  • 14/10-28/10
  • 4 total stops
  • 40h 50m total
  • London to Ko Samui
Search Deals
25/9
  • 25/9
  • 3 total stops
  • 51h 10m total
  • London to Ko Samui
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£66 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£29 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Ko Samui 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 9 June 2026.
Use the filters below to find and compare flights from London to Ko Samui that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sun 23/8

18:40-21:10

2 stops20h 30m

Ko Samui

Wed 9/9

08:45-07:55

2 stops29h 10m

£779

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Sun 13/9

10:40-16:30

2 stops23h 50m

Ko Samui

Thu 17/9

14:00-06:55

2 stops22h 55m

£784

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Tue 18/8

22:15-21:35

1 stop17h 20m

Ko Samui

Sun 6/9

19:10-05:55

1 stop16h 45m

£811

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sun 13/9

10:00-15:10

2 stops23h 10m

Ko Samui

Thu 17/9

15:25-15:20

2 stops29h 55m

£812

LondonKo Samui

LCY - USM

LCYUSM

London City

Fri 28/8

13:10-13:45

2 stops18h 35m

Ko Samui

Wed 16/9

09:15-08:40

2 stops29h 25m

£828

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Sat 21/11

16:45-21:05

2 stops21h 20m

Ko Samui

Thu 3/12

11:40-15:45

2 stops35h 05m

£844

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 1/9

19:25-18:15

1 stop16h 50m

Ko Samui

Tue 29/9

16:25-06:35

1 stop20h 10m

£859

LondonKo Samui

LCY - USM

LCYUSM

London City

Sun 8/11

13:20-14:55

2 stops18h 35m

Ko Samui

Sun 22/11

10:00-08:40

2 stops29h 40m

£864

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Wed 7/10

19:25-21:10

1 stop19h 45m

Ko Samui

Sun 13/12

16:25-05:55

1 stop20h 30m

£908

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sun 1/11

18:40-18:15

1 stop16h 35m

Ko Samui

Fri 13/11

16:25-05:55

1 stop20h 30m

£909

Flights are sorted by cheapest return flights first.

Deals found on 5/6

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from London to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from London 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 London to Ko Samui

What is the cheapest month to book a flight from London to Ko Samui?

Currently, October is the cheapest month in which you can book a flight from London to Ko Samui (average of £112). Flying from London to Ko Samui in March is currently the most expensive (average of £964). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost for a return flight from London to Ko Samui?

What’s the top stopover airport for flights from London to Ko Samui?

Share of one-stop return flights from London to Ko Samui chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Bangkok (BKK) – chosen by Cheapflights users on 76% of one-stop itineraries from London to Ko Samui on Cheapflights.

What’s the cheapest stopover airport for flights from London to Ko Samui?

Average return fare for one-stop flights from London to Ko Samui, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Shanghai (PVG) is the most affordable one-stop option, with an average return flight price of £404.

What’s the fastest stopover option from London to Ko Samui?

Shortest average travel time for one-stop one-way flights from London to Ko Samui, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Vienna (VIE) have the shortest average one-way travel time for one-stop routes: 13h 13m.

Which airport typically offers the quickest stopover for flights from London to Ko Samui?

Average stopover duration for one-stop one-way flights from London to Ko Samui, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Vienna (VIE) offer the fastest connection on this route, with an average stopover time of 0h 48m.

How often are flights from London to Ko Samui delayed?

About 7% of weekly flights between London and Ko Samui have experienced delays in the past year, with the average delay time being 155 minutes.

What is the most punctual flight time for London to Ko Samui flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Friday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Ko Samui flights?

Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 5% of flights being delayed.

How far ahead should I book a flight from London to Ko Samui?

The best time to book flights from London to Ko Samui is 72 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Ko Samui

Get insights into the airlines that provide service to Ko Samui. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ko Samui. Reviews last updated 9 June 2026.
Check out reviews from past customers who have flown with EVA Air,Singapore Airlines, andThai Airways from London to Ko Samui to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.5
Very Good
1,470 reviews
Check prices

Food

8.1

Boarding

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.0

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!
EVA Air
8.5
Very Good
1,470 reviews
EVA Air
8.5
Very Good
1,470 reviews
Check prices

Food

8.1

Boarding

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.0

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!
Singapore Airlines
8.2
Very Good
1,539 reviews
EVA Air
8.5
Very Good
1,470 reviews
Check prices

Food

8.1

Boarding

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.0

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!
Thai Airways
7.9
Good
406 reviews
EVA Air
8.5
Very Good
1,470 reviews
Check prices

Food

8.1

Boarding

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.0

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!
Qatar Airways
7.4
Good
3,729 reviews
EVA Air
8.5
Very Good
1,470 reviews
Check prices

Food

8.1

Boarding

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.0

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!
British Airways
6.7
Okay
8,034 reviews
EVA Air
8.5
Very Good
1,470 reviews
Check prices

Food

8.1

Boarding

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.0

Overall

8.5

Reviews

1 / 20
10.0
Excellent

Daisy,May 2026

SFO - TPE

This ways excellent experience when I took the EVA airline. We will take EVA again!

Related info for your journey

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

    Most people fly into Ko Samui (USM) if they book a flight to Ko Samui from London. On average, Ko Samui has 0 inbound flights from London per day from 13 airlines. Ko Samui is conveniently located just 2.1 mi from Ko Samui’s city center.

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

    Departing from London to Ko Samui will take you 17h 20m. The distance between London and Ko Samui is about 6138 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 flying from London to Ko Samui round-trip?

    According to our current data, Bangkok Airways (£114), Oman Air (£464), and Austrian Airlines (£594) offers the cheapest pricing from London to Ko Samui. Users have found that Bangkok Airways is 87% cheaper than the other options available to this destination.

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

    The most popular route from London to Ko Samui is London Heathrow - Ko Samui. You may also consider London Gatwick - Ko Samui or London City - Ko Samui.

  • Where are the most common stopover locations when flying from London to Ko Samui?

    The most popular stopover on flights from London to Ko Samui is Bangkok.

  • What are some popular things to do or see while on a stopover in Bangkok?

    Pratunam, Siam Square, and Thailand Cultural Center are currently the most popular points of interest in Bangkok at the moment. Pratunam, Siam Square, and Thailand Cultural Center are located about 14.8 mi, 15.1 mi, and 13.1 mi, respectively from Bangkok Suvarnabhumi. Travellers in need of a car in Bangkok can hire one for about £16 per day.

  • Where are the least popular stopover locations for London to Ko Samui flights?

    London to Ko Samui flights have a stopover in Singapore the least frequently.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London to Ko Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London to Ko Samui?

    Currently, October is the cheapest month in which you can book a flight from London to Ko Samui (average of £112). Flying from London to Ko Samui in March is currently the most expensive (average of £964). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Ko Samui?

Book flights to Ko Samui if you plan to visit one of these locations
Ko Pha Ngan
Ko Tao
Khanom

Browse thousands of different options on Cheapflights for your next trip

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Fly from London to Ko Samui on these airlines

Choose from the following airlines for your flight from London to Ko Samui. Flights are based on user searches made on Cheapflights and were last updated on 9 June 2026.
Thai Airways flights from London to Ko Samui
EVA Air flights from London to Ko Samui
Etihad Airways flights from London to Ko Samui

Top 10 airlines flying from London to Ko Samui

Discover the top 10 airlines that operate flights from London to Ko Samui. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 9 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Bangkok AirwaysCheapest£114Average£143FlexibilityNo cancel feeOn-time74%
Search Bangkok Airways flights
Oman AirCheapest£464Average£835FlexibilityNo cancel feeOn-time76%
Search Oman Air flights
Austrian AirlinesCheapest£594Average£687FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
LufthansaCheapest£605Average£704FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
SWISSCheapest£609Average£698FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Etihad AirwaysCheapest£616Average£792FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
KLMCheapest£638Average£790FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£721Average£1,085FlexibilityNo cancel feeOn-time70%
Search British Airways flights
EVA AirCheapest£725Average£846FlexibilityNo cancel feeOn-time74%
Search EVA Air flights
Singapore AirlinesCheapest£748Average£974FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights

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 London to Ko Samui?

When you search for this flight from London to Ko Samui, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from London to Ko Samui?

Cheapflights simply makes it quick and affordable to book flights from London to Ko Samui by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Need flexible booking options for your flight to Ko Samui from London? 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 London to Ko Samui become cheaper?

Not ready to book yet? You can track prices for flights from London to Ko Samui on Cheapflights with our Price Alert feature and get notified when better prices are available.

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