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Cheap flights from London to Ko Samui from £291

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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — USM
16 Jul — 23 Jul1
1 adult

Cheapflights Tip: The best prices from London to Ko Samui are usually found in September or May, booked 80 days in advance, depart on a Wednesday or Tuesday and return on a Friday

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 11 July 2025.

Round-trip from

£715

One-way from

£291

Popular in

December

Cheapest in

September

Average price

£1,149
7/9-20/9
  • 7/9-20/9
  • 4 total stops
  • 58h 20m total
  • London to Ko Samui
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10/9
  • 10/9
  • 3 total stops
  • 51h 30m total
  • London to Ko Samui
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£27 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£18 potential savings vs. average return price).
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Average for round-trip flights in July 2025
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Find flight deals from London to Ko Samui

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 11 July 2025.

Sun 7/906:00LHR - USM
2 stops33h 10mMultiple Airlines
Sat 20/913:30USM - LHR
2 stops25h 10mMultiple Airlines
Deal found 10/7£715
Mon 3/1117:10LHR - USM
2 stops20h 55mSWISS
Mon 1/1210:00USM - LHR
2 stops18h 40mSWISS
Deal found 9/7£717
Mon 3/1113:30LCY - USM
2 stops24h 35mMultiple Airlines
Mon 1/1209:20USM - LCY
2 stops38h 45mMultiple Airlines
Deal found 11/7£717
Mon 20/1021:20LGW - USM
3 stops37h 25mMultiple Airlines
Sat 1/1112:25USM - LGW
3 stops34h 25mMultiple Airlines
Deal found 9/7£718
Tue 2/920:25LHR - USM
2 stops38h 25mLufthansa
Fri 12/913:30USM - LHR
2 stops25h 10mLufthansa
Deal found 10/7£722
Mon 20/1011:40LTN - USM
3 stops47h 05mMultiple Airlines
Sat 1/1112:25USM - LTN
3 stops36h 50mMultiple Airlines
Deal found 9/7£723
Mon 24/1117:05LHR - USM
2 stops21h 00mKLM
Sat 6/1207:00USM - LHR
2 stops20h 50mKLM
Deal found 10/7£724
Mon 6/1008:10LCY - USM
2 stops31h 00mSWISS
Mon 13/1008:45USM - LCY
2 stops30h 05mSWISS
Deal found 11/7£758
Tue 2/914:55LGW - USM
2 stops39h 00mQatar Airways
Fri 12/908:00USM - LGW
2 stops35h 25mQatar Airways
Deal found 11/7£763
Wed 29/1020:35LHR - USM
1 stop28h 25mSingapore Airlines
Mon 10/1119:25USM - LHR
1 stop26h 55mSingapore Airlines
Deal found 9/7£770
Mon 10/1109:20LGW - USM
1 stop26h 10mSingapore Airlines
Sat 22/1119:25USM - LGW
1 stop18h 00mSingapore Airlines
Deal found 10/7£771
Mon 27/1011:50LHR - USM
1 stop20h 45mThai Airways
Sat 8/1107:00USM - LHR
1 stop19h 35mThai Airways
Deal found 9/7£777

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 11 July 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 7/9

06:00-21:10

2 stops33h 10m

Ko Samui

Sat 20/9

13:30-08:40

2 stops25h 10m

£715

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 3/11

17:10-21:05

2 stops20h 55m

Ko Samui

Mon 1/12

10:00-21:40

2 stops18h 40m

£717

LondonKo Samui

LCY - USM

LCYUSM

London City

Mon 3/11

13:30-21:05

2 stops24h 35m

Ko Samui

Mon 1/12

09:20-17:05

2 stops38h 45m

£717

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 5/1

19:30-21:05

2 stops42h 35m

Ko Samui

Mon 19/1

16:25-08:45

2 stops23h 20m

£718

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Mon 20/10

21:20-16:45

3 stops37h 25m

Ko Samui

Sat 1/11

12:25-15:50

3 stops34h 25m

£718

LondonKo Samui

LTN - USM

LTNUSM

London Luton

Mon 20/10

11:40-16:45

3 stops47h 05m

Ko Samui

Sat 1/11

12:25-18:15

3 stops36h 50m

£723

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Mon 24/11

17:05-21:05

2 stops21h 00m

Ko Samui

Sat 6/12

07:00-20:50

2 stops20h 50m

£724

LondonKo Samui

LCY - USM

LCYUSM

London City

Mon 6/10

08:10-21:10

2 stops31h 00m

Ko Samui

Mon 13/10

08:45-08:50

2 stops30h 05m

£758

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Tue 2/9

14:55-11:55

2 stops39h 00m

Ko Samui

Fri 12/9

08:00-13:25

2 stops35h 25m

£763

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Wed 29/10

20:35-08:00

1 stop28h 25m

Ko Samui

Mon 10/11

19:25-15:20

1 stop26h 55m

£770

Flights are sorted by cheapest return flights first.

Deals found on 9/7

Showing 1-10 of 34 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 27 June 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, August is the cheapest month in which you can book a flight from London to Ko Samui (average of £1,019). Flying from London to Ko Samui in December is currently the most expensive (average of £1,669). 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 11 July 2025.

It’s optimal to fly from London to Ko Samui in the afternoon. By choosing this option you can save up to 39% on the cost of your flight, compared to a flight at midday.

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?

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 11 July 2025.
Check out reviews from past customers who have flown with EVA Air, Emirates, andSingapore Airlines 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
1,215 reviews
Check prices

Entertainment

8.0

Food

8.1

Comfort

8.3

Boarding

8.4

Overall

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very Good
1,215 reviews
EVA Air
8.4
Very Good
1,215 reviews
Check prices

Entertainment

8.0

Food

8.1

Comfort

8.3

Boarding

8.4

Overall

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Emirates
8.1
Very Good
3,285 reviews
EVA Air
8.4
Very Good
1,215 reviews
Check prices

Entertainment

8.0

Food

8.1

Comfort

8.3

Boarding

8.4

Overall

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Singapore Airlines
8.1
Very Good
1,324 reviews
EVA Air
8.4
Very Good
1,215 reviews
Check prices

Entertainment

8.0

Food

8.1

Comfort

8.3

Boarding

8.4

Overall

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
KLM
7.8
Good
1,372 reviews
EVA Air
8.4
Very Good
1,215 reviews
Check prices

Entertainment

8.0

Food

8.1

Comfort

8.3

Boarding

8.4

Overall

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Thai Airways
7.7
Good
336 reviews
EVA Air
8.4
Very Good
1,215 reviews
Check prices

Entertainment

8.0

Food

8.1

Comfort

8.3

Boarding

8.4

Overall

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

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.

  • What are the cheapest airlines flying from London to Ko Samui round-trip?

    According to our current data, SWISS (£717), Lufthansa (£718), and KLM (£724) offers the cheapest pricing from London to Ko Samui. Users have found that SWISS is 21% 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 SWISS, with whom users have recently found tickets for as low as £419. However, be on the lookout for offers from Lufthansa and Qatar Airways, 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 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, Thailand Cultural Center, and Patpong Night Market are currently the most popular points of interest in Bangkok at the moment. Pratunam, Thailand Cultural Center, and Patpong Night Market are located about 14.8 mi, 13.1 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, August is the cheapest month in which you can book a flight from London to Ko Samui (average of £1,019). Flying from London to Ko Samui in December is currently the most expensive (average of £1,669). 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 London?

Book flights to London 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 11 July 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 11 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Bangkok AirwaysCheapest£107Average£143FlexibilityNo cancel feeOn-time74%
Search Bangkok Airways flights
Air FranceCheapest£596Average£727FlexibilityNo cancel feeOn-time77%
Search Air France flights
SWISSCheapest£601Average£710FlexibilityNo cancel feeOn-time79%
Search SWISS flights
KLMCheapest£605Average£722FlexibilityNo cancel feeOn-time75%
Search KLM flights
EmiratesCheapest£615Average£818FlexibilityNo cancel feeOn-time75%
Search Emirates flights
LufthansaCheapest£628Average£713FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£663Average£730FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
Etihad AirwaysCheapest£670Average£724FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
EVA AirCheapest£714Average£810FlexibilityNo cancel feeOn-time74%
Search EVA Air flights
British AirwaysCheapest£732Average£1,042FlexibilityNo 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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