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Cheap flights from London to Ko Samui from £323

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 30/10. Fares are subject to change and may not be available on all flights or dates of travel.
LON — USM
3 Sep — 10 Sep1
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 4 August 2026.

Tue 1/912:35
LGW
-
USM
2 stops23h 10m
Multiple Airlines
Tue 8/910:05
USM
-
LGW
2 stops26h 30m
Multiple Airlines
Deal found 30/7£682
Tue 24/1109:00
LHR
-
USM
2 stops18h 40m
SWISS
Thu 17/1210:00
USM
-
LHR
2 stops18h 40m
SWISS
Deal found 31/7£683
Wed 30/906:00
LHR
-
USM
2 stops29h 45m
Multiple Airlines
Thu 15/1008:45
USM
-
LHR
2 stops19h 00m
Multiple Airlines
Deal found 4/8£684
Sun 30/811:00
LGW
-
USM
2 stops25h 45m
Multiple Airlines
Wed 9/906:55
USM
-
LGW
2 stops29h 35m
Multiple Airlines
Deal found 31/7£685
Wed 30/906:00
LHR
-
USM
2 stops32h 30m
Austrian Airlines
Wed 14/1020:35
USM
-
LHR
2 stops17h 45m
Austrian Airlines
Deal found 4/8£685
Sun 1/1106:00
LHR
-
USM
2 stops26h 35m
Austrian Airlines
Mon 30/1120:20
USM
-
LHR
2 stops19h 00m
Austrian Airlines
Deal found 1/8£688
Wed 16/906:00
LHR
-
USM
2 stops32h 30m
Austrian Airlines
Wed 23/920:35
USM
-
LHR
2 stops17h 45m
Austrian Airlines
Deal found 1/8£688
Sat 17/1016:55
LGW
-
USM
2 stops18h 10m
Multiple Airlines
Tue 27/1008:30
USM
-
LGW
1 stop38h 05m
Multiple Airlines
Deal found 30/7£689
Mon 14/910:00
LHR
-
USM
2 stops25h 05m
Multiple Airlines
Mon 21/906:00
USM
-
LHR
2 stops30h 55m
Multiple Airlines
Deal found 31/7£689
Tue 13/1013:50
LHR
-
USM
2 stops17h 55m
Multiple Airlines
Wed 28/1016:25
USM
-
LHR
2 stops22h 40m
Multiple Airlines
Deal found 30/7£690
Tue 15/910:00
LHR
-
USM
2 stops20h 45m
Multiple Airlines
Tue 22/915:50
USM
-
LHR
2 stops21h 05m
Multiple Airlines
Deal found 1/8£691
Wed 2/906:00
LHR
-
USM
2 stops32h 30m
Austrian Airlines
Mon 21/920:35
USM
-
LHR
2 stops17h 45m
Austrian Airlines
Deal found 3/8£692

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 4 August 2026.

Round-trip from

£682

One-way from

£323

Popular in

December

Cheapest in

November

Average price

£970
1/9-8/9
  • 1/9-8/9
  • 4 total stops
  • 49h 40m total
  • London to Ko Samui
Search Deals
30/10
  • 30/10
  • 3 total stops
  • 43h 00m total
  • London to Ko Samui
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£85 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£34 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 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 4 August 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

LGW - USM

LGWUSM

London Gatwick

Sun 23/8

10:40-17:05

2 stops24h 25m

Ko Samui

Tue 8/9

14:35-06:55

2 stops22h 20m

£749

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Thu 27/8

05:40-18:50

3 stops31h 10m

Ko Samui

Sun 27/9

08:40-12:05

3 stops33h 25m

£754

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Tue 12/1

18:40-21:05

2 stops19h 25m

Ko Samui

Sun 24/1

16:25-07:50

2 stops22h 25m

£763

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Sat 5/9

05:40-18:50

3 stops31h 10m

Ko Samui

Fri 18/9

11:05-19:55

3 stops38h 50m

£775

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Fri 9/10

06:20-17:20

3 stops29h 00m

Ko Samui

Mon 19/10

19:45-23:55

3 stops34h 10m

£810

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Thu 14/1

18:40-21:05

2 stops19h 25m

Ko Samui

Sun 24/1

16:25-07:50

2 stops22h 25m

£812

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Thu 3/9

14:45-17:05

2 stops20h 20m

Ko Samui

Thu 17/9

06:00-18:45

2 stops18h 45m

£821

LondonKo Samui

LCY - USM

LCYUSM

London City

Wed 21/10

13:10-12:45

2 stops17h 35m

Ko Samui

Mon 26/10

16:25-08:40

2 stops23h 15m

£827

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Fri 4/9

05:40-18:50

3 stops31h 10m

Ko Samui

Fri 18/9

11:05-19:55

3 stops38h 50m

£829

LondonKo Samui

LCY - USM

LCYUSM

London City

Mon 19/10

09:15-12:45

2 stops21h 30m

Ko Samui

Sun 25/10

10:00-08:40

2 stops29h 40m

£833

Flights are sorted by cheapest return flights first.

Deals found on 3/8

Showing 1-10 of 60 resultsSorted by cheapest first
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2
3
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6

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, November is the cheapest month in which you can book a flight from London to Ko Samui (average of £792). Flying from London to Ko Samui in December is currently the most expensive (average of £1,345). 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?

Airfare is below average for this route at the moment.
London to Ko Samui flights typically cost between £821 and £1,122 in September.
The cheapest return price found within the last 5 days was £682 on Multiple Airlines (1 Sept–8 Sept).

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 75% 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 £398.

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 9% of weekly flights between London and Ko Samui have experienced delays in the past year, with the average delay time being 154 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 early afternoon tend to experience delays more often.

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

Saturday tends to have the lowest number of delays on this route, whereas Tuesday 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 26 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 4 August 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
1,511 reviews
Check prices

Entertainment

8.0

Overall

8.5

Food

8.1

Boarding

8.5

Comfort

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CRK - TPE

What about midnight snacks to add? Used to have that before..
EVA Air
8.5
Very Good
1,511 reviews
EVA Air
8.5
Very Good
1,511 reviews
Check prices

Entertainment

8.0

Overall

8.5

Food

8.1

Boarding

8.5

Comfort

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CRK - TPE

What about midnight snacks to add? Used to have that before..
Singapore Airlines
8.2
Very Good
1,584 reviews
EVA Air
8.5
Very Good
1,511 reviews
Check prices

Entertainment

8.0

Overall

8.5

Food

8.1

Boarding

8.5

Comfort

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CRK - TPE

What about midnight snacks to add? Used to have that before..
Thai Airways
7.9
Good
413 reviews
EVA Air
8.5
Very Good
1,511 reviews
Check prices

Entertainment

8.0

Overall

8.5

Food

8.1

Boarding

8.5

Comfort

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CRK - TPE

What about midnight snacks to add? Used to have that before..
Qatar Airways
7.4
Good
3,736 reviews
EVA Air
8.5
Very Good
1,511 reviews
Check prices

Entertainment

8.0

Overall

8.5

Food

8.1

Boarding

8.5

Comfort

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CRK - TPE

What about midnight snacks to add? Used to have that before..
British Airways
6.7
Okay
8,147 reviews
EVA Air
8.5
Very Good
1,511 reviews
Check prices

Entertainment

8.0

Overall

8.5

Food

8.1

Boarding

8.5

Comfort

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CRK - TPE

What about midnight snacks to add? Used to have that before..

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 12 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 19h 25m. 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 (£115), Oman Air (£461), and Austrian Airlines (£589) 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 Stansted - 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 Patpong Night Market are currently the most popular points of interest in Bangkok at the moment. Pratunam, Siam Square, and Patpong Night Market are located about 14.8 mi, 15.1 mi, and 14.9 mi, respectively from Bangkok Suvarnabhumi. Travellers in need of a car in Bangkok can hire one for about £18 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, November is the cheapest month in which you can book a flight from London to Ko Samui (average of £792). Flying from London to Ko Samui in December is currently the most expensive (average of £1,345). 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 4 August 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 4 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Bangkok AirwaysCheapest£115Average£138FlexibilityNo cancel feeOn-time74%
Search Bangkok Airways flights
Oman AirCheapest£461Average£947FlexibilityNo cancel feeOn-time76%
Search Oman Air flights
Austrian AirlinesCheapest£589Average£683FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
LufthansaCheapest£600Average£752FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Etihad AirwaysCheapest£611Average£788FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
SWISSCheapest£612Average£699FlexibilityNo cancel feeOn-time79%
Search SWISS flights
British AirwaysCheapest£715Average£996FlexibilityNo cancel feeOn-time70%
Search British Airways flights
EVA AirCheapest£722Average£843FlexibilityNo cancel feeOn-time74%
Search EVA Air flights
Qatar AirwaysCheapest£752Average£868FlexibilityNo cancel feeOn-time68%
Search Qatar Airways flights
Singapore AirlinesCheapest£753Average£957FlexibilityNo 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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