Find flights
When to book
Airlines
FAQs

Cheap flights from London to Ko Samui from £343

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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — USM
6 Aug — 13 Aug1
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 7 July 2026.

Mon 30/1111:30
LHR
-
USM
2 stops26h 35m
Multiple Airlines
Wed 16/1209:20
USM
-
LHR
2 stops19h 20m
Multiple Airlines
Deal found 5/7£701
Thu 27/817:10
LHR
-
USM
3 stops21h 35m
Multiple Airlines
Fri 11/909:15
USM
-
LHR
2 stops35h 50m
Multiple Airlines
Deal found 6/7£703
Sat 12/907:30
STN
-
USM
3 stops32h 05m
Multiple Airlines
Sat 26/918:15
USM
-
STN
2 stops23h 40m
Multiple Airlines
Deal found 4/7£704
Thu 24/907:05
LGW
-
USM
3 stops27h 50m
Multiple Airlines
Tue 29/911:05
USM
-
LGW
3 stops26h 20m
Multiple Airlines
Deal found 6/7£704
Sat 12/908:55
LGW
-
USM
3 stops29h 35m
Multiple Airlines
Sat 26/913:30
USM
-
LGW
2 stops23h 25m
Multiple Airlines
Deal found 4/7£705
Tue 15/908:30
STN
-
USM
3 stops30h 20m
Multiple Airlines
Sun 4/1006:00
USM
-
STN
3 stops24h 40m
Multiple Airlines
Deal found 4/7£705
Wed 30/913:50
LHR
-
USM
2 stops17h 20m
SWISS
Wed 14/1009:15
USM
-
LHR
2 stops18h 30m
SWISS
Deal found 7/7£706
Mon 31/806:45
LGW
-
USM
3 stops22h 00m
Multiple Airlines
Mon 14/917:55
USM
-
LGW
3 stops34h 55m
Multiple Airlines
Deal found 2/7£707
Mon 24/807:30
STN
-
USM
3 stops30h 55m
Multiple Airlines
Thu 3/914:30
USM
-
STN
3 stops39h 25m
Multiple Airlines
Deal found 3/7£707
Mon 9/1119:05
LCY
-
USM
2 stops19h 00m
SWISS
Mon 23/1110:00
USM
-
LCY
2 stops29h 40m
SWISS
Deal found 3/7£708
Sun 15/1109:00
LHR
-
USM
2 stops22h 55m
SWISS
Tue 24/1109:20
USM
-
LHR
2 stops19h 20m
SWISS
Deal found 7/7£708
Mon 9/1110:30
LGW
-
USM
2 stops24h 10m
Multiple Airlines
Tue 17/1108:55
USM
-
LGW
3 stops28h 30m
Multiple Airlines
Deal found 6/7£709

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 7 July 2026.

Round-trip from

£701

One-way from

£343

Popular in

December

Cheapest in

November

Average price

£971
SWISS
  • SWISS
  • 30/11-16/12
  • 4 total stops
  • 45h 55m total
  • London to Ko Samui
Search Deals
12/9
  • 12/9
  • 2 total stops
  • 28h 50m total
  • London to Ko Samui
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£70 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£28 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 7 July 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

LTN - USM

LTNUSM

London Luton

Thu 27/8

15:00-20:45

3 stops23h 45m

Ko Samui

Fri 11/9

19:00-00:30

3 stops35h 30m

£712

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Sun 15/11

10:30-17:40

2 stops24h 10m

Ko Samui

Tue 24/11

21:30-15:35

1 stop25h 05m

£720

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Mon 24/8

16:10-21:35

3 stops23h 25m

Ko Samui

Thu 3/9

19:00-23:25

3 stops34h 25m

£728

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Sun 23/8

06:20-14:40

3 stops26h 20m

Ko Samui

Tue 8/9

17:55-13:25

3 stops25h 30m

£752

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Thu 27/8

15:00-20:45

3 stops23h 45m

Ko Samui

Mon 31/8

09:15-22:50

3 stops43h 35m

£752

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Mon 24/8

07:15-13:45

3 stops24h 30m

Ko Samui

Mon 7/9

17:25-19:55

3 stops32h 30m

£773

LondonKo Samui

LCY - USM

LCYUSM

London City

Tue 1/12

19:05-21:05

2 stops19h 00m

Ko Samui

Tue 22/12

10:00-08:40

2 stops29h 40m

£787

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Sat 5/12

12:15-18:50

3 stops47h 35m

Ko Samui

Wed 6/1

08:55-21:40

3 stops43h 45m

£814

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Wed 26/8

06:15-16:55

3 stops28h 40m

Ko Samui

Fri 4/9

09:15-00:30

3 stops45h 15m

£841

LondonKo Samui

STN - USM

STNUSM

London Stansted

Mon 7/9

14:55-18:00

2 stops21h 05m

Ko Samui

Tue 15/9

19:00-18:45

2 stops29h 45m

£882

Flights are sorted by cheapest return flights first.

Deals found on 4/7

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
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, 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 £1,050). 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 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 £401.

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 152 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 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 7 July 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
1,489 reviews
Check prices

Comfort

8.3

Entertainment

8.0

Overall

8.5

Crew

8.7

Boarding

8.4

Food

8.1

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
1,489 reviews
EVA Air
8.5
Very Good
1,489 reviews
Check prices

Comfort

8.3

Entertainment

8.0

Overall

8.5

Crew

8.7

Boarding

8.4

Food

8.1

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
1,563 reviews
EVA Air
8.5
Very Good
1,489 reviews
Check prices

Comfort

8.3

Entertainment

8.0

Overall

8.5

Crew

8.7

Boarding

8.4

Food

8.1

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
409 reviews
EVA Air
8.5
Very Good
1,489 reviews
Check prices

Comfort

8.3

Entertainment

8.0

Overall

8.5

Crew

8.7

Boarding

8.4

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CRK - TPE

What about midnight snacks to add? Used to have that before..
Qatar Airways
7.3
Good
3,743 reviews
EVA Air
8.5
Very Good
1,489 reviews
Check prices

Comfort

8.3

Entertainment

8.0

Overall

8.5

Crew

8.7

Boarding

8.4

Food

8.1

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
8,099 reviews
EVA Air
8.5
Very Good
1,489 reviews
Check prices

Comfort

8.3

Entertainment

8.0

Overall

8.5

Crew

8.7

Boarding

8.4

Food

8.1

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 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 19h. The distance between London and Ko Samui is about 6123 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 (£118), Oman Air (£464), and Austrian Airlines (£593) 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 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 £17 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 £1,050). 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

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

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 7 July 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 7 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Bangkok AirwaysCheapest£118Average£143FlexibilityNo cancel feeOn-time74%
Search Bangkok Airways flights
Oman AirCheapest£464Average£954FlexibilityNo cancel feeOn-time76%
Search Oman Air flights
Austrian AirlinesCheapest£593Average£687FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
LufthansaCheapest£604Average£695FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Etihad AirwaysCheapest£615Average£791FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
SWISSCheapest£616Average£712FlexibilityNo cancel feeOn-time79%
Search SWISS flights
KLMCheapest£637Average£771FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£720Average£1,109FlexibilityNo cancel feeOn-time70%
Search British Airways flights
EVA AirCheapest£721Average£842FlexibilityNo cancel feeOn-time74%
Search EVA Air flights
Qatar AirwaysCheapest£757Average£894FlexibilityNo cancel feeOn-time68%
Search Qatar Airways 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.

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.