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Cheap flights from London to Ko Samui from £318

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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — USM
4 Mar — 11 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Ko Samui are usually found in May or November, booked 80 days in advance, depart on a Wednesday or Tuesday and return on a Friday

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 2 February 2026.

Sun 26/410:25
LGW
-
USM
2 stops28h 45m
Air France
Mon 11/516:25
USM
-
LGW
2 stops23h 15m
Air France
Deal found 1/2£716
Fri 20/1108:45
LHR
-
USM
2 stops29h 20m
Lufthansa
Fri 4/1220:20
USM
-
LHR
2 stops32h 20m
Lufthansa
Deal found 1/2£717
Tue 10/1115:50
LHR
-
USM
3 stops20h 05m
Multiple Airlines
Tue 24/1109:20
USM
-
LHR
2 stops30h 00m
Multiple Airlines
Deal found 31/1£718
Fri 1/515:35
LGW
-
USM
2 stops23h 15m
Multiple Airlines
Sun 7/607:50
USM
-
LGW
2 stops31h 05m
Multiple Airlines
Deal found 1/2£719
Wed 10/613:10
LCY
-
USM
2 stops17h 35m
Multiple Airlines
Thu 18/616:25
USM
-
LCY
2 stops22h 15m
Multiple Airlines
Deal found 1/2£719
Fri 1/514:45
LHR
-
USM
2 stops35h 40m
Multiple Airlines
Fri 15/519:10
USM
-
LHR
2 stops25h 55m
Multiple Airlines
Deal found 2/2£719
Thu 24/915:35
LGW
-
USM
2 stops22h 55m
Multiple Airlines
Sun 4/1007:50
USM
-
LGW
2 stops31h 05m
Multiple Airlines
Deal found 31/1£721
Wed 21/1010:00
LGW
-
USM
2 stops19h 55m
Multiple Airlines
Thu 29/1007:00
USM
-
LGW
1 stop22h 25m
Multiple Airlines
Deal found 1/2£721
Wed 6/509:15
LCY
-
USM
2 stops21h 30m
SWISS
Wed 27/510:05
USM
-
LCY
2 stops28h 35m
SWISS
Deal found 1/2£721
Tue 15/909:30
LHR
-
USM
2 stops20h 25m
Etihad Airways
Thu 1/1019:10
USM
-
LHR
2 stops25h 55m
Etihad Airways
Deal found 1/2£721
Mon 11/509:15
LGW
-
USM
2 stops21h 30m
SWISS
Sat 23/509:15
USM
-
LGW
2 stops38h 35m
SWISS
Deal found 31/1£723
Sat 13/609:30
LHR
-
USM
2 stops19h 00m
Multiple Airlines
Fri 26/606:00
USM
-
LHR
2 stops18h 45m
Multiple Airlines
Deal found 1/2£723

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 2 February 2026.

Round-trip from

£716

One-way from

£318

Popular in

December

Cheapest in

May

Average price

£861
Air France
  • Air France
  • 26/4-11/5
  • 4 total stops
  • 52h 00m total
  • London to Ko Samui
Search Deals
5/4
  • 5/4
  • 3 total stops
  • 50h 25m total
  • London to Ko Samui
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£31 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£18 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 2 February 2026.
Use the filters below to find and compare flights from London to Ko Samui that are best for you.

Fly from

London

Fly to

Ko Samui

Route

Depart

Return

Price

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Fri 1/5

14:45-08:25

2 stops35h 40m

Ko Samui

Fri 15/5

19:10-15:05

2 stops25h 55m

£719

LondonKo Samui

LCY - USM

LCYUSM

London City

Thu 11/6

13:10-12:45

2 stops17h 35m

Ko Samui

Tue 16/6

10:05-08:40

2 stops28h 35m

£724

LondonKo Samui

LCY - USM

LCYUSM

London City

Mon 18/5

09:15-12:45

2 stops21h 30m

Ko Samui

Tue 26/5

10:05-08:40

2 stops28h 35m

£724

LondonKo Samui

LCY - USM

LCYUSM

London City

Mon 18/5

09:15-12:45

2 stops21h 30m

Ko Samui

Mon 25/5

10:05-08:40

2 stops28h 35m

£724

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Sun 17/5

09:30-10:30

2 stops19h 00m

Ko Samui

Mon 25/5

19:10-12:45

2 stops23h 35m

£727

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Sun 3/5

06:20-20:50

3 stops32h 30m

Ko Samui

Wed 6/5

17:50-11:50

3 stops24h 00m

£743

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Fri 15/5

09:25-07:45

1 stop16h 20m

Ko Samui

Tue 26/5

08:40-19:30

1 stop16h 50m

£746

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Fri 1/5

20:35-18:50

1 stop16h 15m

Ko Samui

Wed 13/5

08:40-19:30

1 stop16h 50m

£746

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Sun 10/5

09:25-12:45

2 stops21h 20m

Ko Samui

Sat 23/5

09:15-08:20

2 stops29h 05m

£760

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Wed 3/6

14:55-15:45

2 stops18h 50m

Ko Samui

Sat 27/6

17:50-06:40

2 stops18h 50m

£763

Flights are sorted by cheapest return flights first.

Deals found on 1/2

Showing 1-10 of 60 results
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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

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

Use this chart to determine the optimal time to book a return flight from London to Ko Samui. Price data was last updated on 30 January 2026.

The best time to book flights from London to Ko Samui is 80 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.

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

Currently, January is the cheapest month in which you can book a flight from London to Ko Samui (average of £246). Flying from London to Ko Samui in February is currently the most expensive (average of £702). 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.

What is the cheapest time of day to fly from LON to USM?

Find hourly flight availability from London to Ko Samui. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 2 February 2026.

It’s optimal to fly from London to Ko Samui at midday. By choosing this option you can save up to 27% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from London to Ko Samui?

Use this chart to determine the cheapest time to fly return from London to Ko Samui. Price data was last updated on 30 March 2025.

Travellers seeking maximum savings on their London to Ko Samui flight should consider departing on Wednesday at midday when fares are most often at their lowest. Tuesday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

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 81% 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 £416.

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 10% of weekly flights between London and Ko Samui have experienced delays in the past year, with the average delay time being 150 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?

Wednesday 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 4% of flights being delayed.

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 2 February 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
8.4
Very Good
1,338 reviews
Check prices

Comfort

8.3

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Jolene,Jan 2026

SGN - TPE

Everything was good. I asked for aisle seating as I must stretch my leg out because of back and pelvis issues. Sometimes I don't always get it. But I did for all 3 of my flights for my destination. It was very nice.
EVA Air
8.4
Very Good
1,338 reviews
EVA Air
8.4
Very Good
1,338 reviews
Check prices

Comfort

8.3

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Jolene,Jan 2026

SGN - TPE

Everything was good. I asked for aisle seating as I must stretch my leg out because of back and pelvis issues. Sometimes I don't always get it. But I did for all 3 of my flights for my destination. It was very nice.
Singapore Airlines
8.2
Very Good
1,443 reviews
EVA Air
8.4
Very Good
1,338 reviews
Check prices

Comfort

8.3

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Jolene,Jan 2026

SGN - TPE

Everything was good. I asked for aisle seating as I must stretch my leg out because of back and pelvis issues. Sometimes I don't always get it. But I did for all 3 of my flights for my destination. It was very nice.
Thai Airways
7.8
Good
381 reviews
EVA Air
8.4
Very Good
1,338 reviews
Check prices

Comfort

8.3

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Jolene,Jan 2026

SGN - TPE

Everything was good. I asked for aisle seating as I must stretch my leg out because of back and pelvis issues. Sometimes I don't always get it. But I did for all 3 of my flights for my destination. It was very nice.
Qatar Airways
7.4
Good
3,729 reviews
EVA Air
8.4
Very Good
1,338 reviews
Check prices

Comfort

8.3

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Jolene,Jan 2026

SGN - TPE

Everything was good. I asked for aisle seating as I must stretch my leg out because of back and pelvis issues. Sometimes I don't always get it. But I did for all 3 of my flights for my destination. It was very nice.
British Airways
6.7
Okay
7,709 reviews
EVA Air
8.4
Very Good
1,338 reviews
Check prices

Comfort

8.3

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Jolene,Jan 2026

SGN - TPE

Everything was good. I asked for aisle seating as I must stretch my leg out because of back and pelvis issues. Sometimes I don't always get it. But I did for all 3 of my flights for my destination. It was very nice.

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 14 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 16h 20m. The distance between London and Ko Samui is about 6144 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 (£111), Air India (£425), and Etihad Airways (£430) 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 cheapest airlines to fly from London to Ko Samui one-way?

    The cheapest airline one-way is EVA Air, with whom users have recently found tickets for as low as £485. However, be on the lookout for offers from Thai Airways and Singapore Airlines, as they are both options that can get you from London to Ko Samui for a low price.

  • 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 £20 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, January is the cheapest month in which you can book a flight from London to Ko Samui (average of £246). Flying from London to Ko Samui in February is currently the most expensive (average of £702). 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

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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 2 February 2026.
EVA Air flights from London to Ko Samui
Thai Airways 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 2 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Bangkok AirwaysCheapest£111Average£140FlexibilityNo cancel feeOn-time74%
Search Bangkok Airways flights
Air IndiaCheapest£425Average£482FlexibilityNo cancel feeOn-timeN/A
Search Air India flights
Etihad AirwaysCheapest£430Average£759FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Austrian AirlinesCheapest£588Average£681FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
LufthansaCheapest£590Average£686FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
SWISSCheapest£593Average£680FlexibilityNo cancel feeOn-time79%
Search SWISS flights
KLMCheapest£621Average£752FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air FranceCheapest£646Average£714FlexibilityNo cancel feeOn-time77%
Search Air France flights
EVA AirCheapest£712Average£813FlexibilityNo cancel feeOn-time74%
Search EVA Air flights
British AirwaysCheapest£714Average£1,059FlexibilityNo cancel feeOn-time70%
Search British 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.

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