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Cheap flights from London to Ko Samui from £250

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 23/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — USM
13 Dec — 20 Dec1
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

Find flight deals from London to Ko Samui

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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 13 November 2025.

Fri 21/1110:30LGW - USM
2 stops27h 00mMultiple Airlines
Wed 3/1207:55USM - LGW
1 stop17h 35mMultiple Airlines
Deal found 12/11£712
Tue 25/1110:30LGW - USM
2 stops24h 55mMultiple Airlines
Wed 3/1207:55USM - LGW
1 stop17h 35mMultiple Airlines
Deal found 12/11£714
Sat 22/1110:30LGW - USM
2 stops26h 55mMultiple Airlines
Mon 1/1207:55USM - LGW
2 stops29h 35mMultiple Airlines
Deal found 12/11£718
Tue 18/1106:30STN - USM
3 stops30h 45mMultiple Airlines
Fri 28/1118:05USM - STN
2 stops26h 05mMultiple Airlines
Deal found 12/11£718
Thu 4/1213:45LHR - USM
2 stops23h 40mMultiple Airlines
Tue 9/1218:05USM - LHR
2 stops21h 00mMultiple Airlines
Deal found 11/11£718
Mon 24/1110:30LGW - USM
2 stops27h 00mMultiple Airlines
Thu 4/1207:55USM - LGW
1 stop17h 25mMultiple Airlines
Deal found 12/11£719
Tue 18/1120:25LHR - USM
2 stops31h 10mMultiple Airlines
Fri 28/1114:30USM - LHR
2 stops32h 25mMultiple Airlines
Deal found 12/11£719
Thu 20/1108:05LGW - USM
2 stops40h 55mMultiple Airlines
Mon 1/1208:30USM - LGW
1 stop17h 00mMultiple Airlines
Deal found 12/11£720
Wed 19/1110:30LGW - USM
2 stops26h 55mMultiple Airlines
Wed 3/1207:55USM - LGW
1 stop17h 35mMultiple Airlines
Deal found 12/11£721
Sun 16/1106:25LGW - USM
3 stops29h 25mMultiple Airlines
Wed 26/1107:55USM - LGW
1 stop17h 35mMultiple Airlines
Deal found 11/11£722
Sun 30/1109:30LHR - USM
2 stops25h 45mMultiple Airlines
Thu 29/108:15USM - LHR
2 stops37h 30mMultiple Airlines
Deal found 11/11£722
Tue 25/1116:00LGW - USM
1 stop17h 25mMultiple Airlines
Tue 9/1208:15USM - LGW
2 stops31h 20mMultiple Airlines
Deal found 12/11£727

Cheap 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 13 November 2025.

Round-trip from

£710

One-way from

£250

Popular in

December

Cheapest in

May

Average price

£818
Etihad Airways
  • Etihad Airways
  • 7/4-30/4
  • 4 total stops
  • 55h 00m total
  • London to Ko Samui
Search Deals
23/3
  • 23/3
  • 3 total stops
  • 34h 35m total
  • London to Ko Samui
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£30 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£19 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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 13 November 2025.
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

Sun 10/5

21:45-10:10

2 stops30h 25m

Ko Samui

Tue 26/5

20:50-18:45

2 stops27h 55m

£714

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Tue 20/1

06:25-19:45

3 stops30h 20m

Ko Samui

Tue 3/3

12:25-23:10

3 stops41h 45m

£718

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Thu 9/4

20:55-07:20

2 stops28h 25m

Ko Samui

Sun 10/5

19:30-15:15

2 stops25h 45m

£720

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 2/2

20:55-21:20

2 stops17h 25m

Ko Samui

Wed 11/3

19:00-12:05

2 stops24h 05m

£727

LondonKo Samui

STN - USM

STNUSM

London Stansted

Fri 27/2

06:10-11:35

3 stops22h 25m

Ko Samui

Fri 13/3

08:55-13:10

2 stops35h 15m

£742

LondonKo Samui

LCY - USM

LCYUSM

London City

Fri 1/5

19:20-13:45

2 stops36h 25m

Ko Samui

Wed 13/5

10:05-17:15

2 stops37h 10m

£758

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Thu 11/12

08:00-21:20

3 stops30h 20m

Ko Samui

Thu 18/12

07:15-23:10

3 stops46h 55m

£765

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Mon 4/5

18:35-12:45

2 stops36h 10m

Ko Samui

Fri 15/5

10:05-17:50

2 stops37h 45m

£778

LondonKo Samui

LCY - USM

LCYUSM

London City

Mon 9/2

17:50-08:00

2 stops31h 10m

Ko Samui

Wed 4/3

13:25-12:55

2 stops30h 30m

£783

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 19/1

18:40-21:05

2 stops19h 25m

Ko Samui

Thu 29/1

09:20-21:40

2 stops19h 20m

£783

Flights are sorted by cheapest return flights first.

Deals found on 10/11

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 7 November 2025.

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, December is the cheapest month in which you can book a flight from London to Ko Samui (average of £331). Flying from London to Ko Samui in February is currently the most expensive (average of £734). 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 13 November 2025.

It’s optimal to fly from London to Ko Samui at midday. By choosing this option you can save up to 24% 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 16 December 2024.

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. Sunday evenings 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 80% 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.

New Delhi (DEL) is the most affordable one-stop option, with an average return flight price of £420.

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.

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 13 November 2025.
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
1,275 reviews
Check prices

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.6

Entertainment

8.0

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.
EVA Air
8.4
Very Good
1,275 reviews
EVA Air
8.4
Very Good
1,275 reviews
Check prices

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.6

Entertainment

8.0

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.
Singapore Airlines
8.1
Very Good
1,400 reviews
EVA Air
8.4
Very Good
1,275 reviews
Check prices

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.6

Entertainment

8.0

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.
Thai Airways
7.8
Good
361 reviews
EVA Air
8.4
Very Good
1,275 reviews
Check prices

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.6

Entertainment

8.0

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.
Qatar Airways
7.4
Good
3,660 reviews
EVA Air
8.4
Very Good
1,275 reviews
Check prices

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.6

Entertainment

8.0

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.
British Airways
6.7
Okay
7,513 reviews
EVA Air
8.4
Very Good
1,275 reviews
Check prices

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.6

Entertainment

8.0

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2025

TPE - YYZ

All was well. Despite the flight being delayed a few minutes, passengers were made sure to be informed and updated on the status of the delay.

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 24h 30m. 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 (£116), Air India (£420), and Austrian Airlines (£613) 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 £21 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, December is the cheapest month in which you can book a flight from London to Ko Samui (average of £331). Flying from London to Ko Samui in February is currently the most expensive (average of £734). 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 13 November 2025.
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 13 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Bangkok AirwaysCheapest£116Average£146FlexibilityNo cancel feeOn-time74%
Search Bangkok Airways flights
Air IndiaCheapest£420Average£502FlexibilityNo cancel feeOn-timeN/A
Search Air India flights
Austrian AirlinesCheapest£613Average£714FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
SWISSCheapest£622Average£709FlexibilityNo cancel feeOn-time79%
Search SWISS flights
KLMCheapest£648Average£775FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapest£650Average£719FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Etihad AirwaysCheapest£660Average£745FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Air FranceCheapest£674Average£748FlexibilityNo cancel feeOn-time77%
Search Air France flights
EVA AirCheapest£744Average£850FlexibilityNo cancel feeOn-time74%
Search EVA Air flights
British AirwaysCheapest£757Average£1,113FlexibilityNo 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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