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Cheap flights from London to Ko Samui from £283

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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — USM
17 Apr — 24 Apr1
1 adult

Cheapflights Tip: The best prices from London to Ko Samui are usually found in September or October, booked 11 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 12 April 2025.

Round-trip from

£756

One-way from

£283

Popular in

December

Cheapest in

September

Average price

£1,079
Austrian Airlines
  • Austrian Airlines
  • 6/6-22/6
  • 4 total stops
  • 36h 05m total
  • London to Ko Samui
Search Deals
3/6
  • 3/6
  • 3 total stops
  • 56h 25m total
  • London to Ko Samui
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£29 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 April 2025
Search Deals

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 12 April 2025.

Fri 6/619:30LHR - USM
2 stops17h 00mAustrian Airlines
Sun 22/619:15USM - LHR
2 stops19h 05mAustrian Airlines
Deal found 11/4£756
Wed 14/513:05LCY - USM
2 stops17h 40mSWISS
Thu 29/509:30USM - LCY
2 stops29h 20mSWISS
Deal found 11/4£759
Tue 22/410:00LHR - USM
2 stops25h 05mMultiple Airlines
Tue 6/508:20USM - LHR
2 stops28h 35mMultiple Airlines
Deal found 11/4£761
Fri 26/914:40LGW - USM
3 stops23h 50mMultiple Airlines
Sun 26/1007:00USM - LGW
2 stops30h 30mMultiple Airlines
Deal found 10/4£763
Wed 14/517:10LCY - USM
2 stops19h 05mKLM
Thu 22/508:45USM - LCY
2 stops28h 30mKLM
Deal found 11/4£765
Wed 14/521:35LHR - USM
1 stop16h 55mEVA Air
Thu 29/508:45USM - LHR
1 stop16h 35mEVA Air
Deal found 11/4£779
Tue 3/609:00LGW - USM
2 stops20h 55mQatar Airways
Tue 17/615:25USM - LGW
2 stops45h 15mQatar Airways
Deal found 11/4£782
Tue 20/513:45LHR - USM
2 stops18h 00mSWISS
Tue 3/616:25USM - LHR
2 stops25h 00mSWISS
Deal found 11/4£788
Wed 5/1110:55LHR - USM
1 stop24h 35mSingapore Airlines
Wed 19/1111:45USM - LHR
1 stop25h 10mSingapore Airlines
Deal found 11/4£796
Wed 29/1008:35LHR - USM
2 stops20h 20mQatar Airways
Mon 24/1118:15USM - LHR
2 stops24h 55mQatar Airways
Deal found 11/4£799
Wed 29/1014:05STN - USM
2 stops17h 50mEmirates
Mon 24/1115:35USM - STN
2 stops27h 30mEmirates
Deal found 11/4£814
Thu 15/518:40LGW - USM
2 stops20h 30mSWISS
Sun 15/616:25USM - LGW
2 stops31h 25mSWISS
Deal found 11/4£817

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 12 April 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

Fri 6/6

19:30-18:30

2 stops17h 00m

Ko Samui

Sun 22/6

19:15-08:20

2 stops19h 05m

£756

LondonKo Samui

LCY - USM

LCYUSM

London City

Wed 14/5

13:05-12:45

2 stops17h 40m

Ko Samui

Thu 29/5

09:30-08:50

2 stops29h 20m

£759

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 22/4

10:00-17:05

2 stops25h 05m

Ko Samui

Tue 6/5

08:20-06:55

2 stops28h 35m

£761

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Fri 26/9

14:40-20:30

3 stops23h 50m

Ko Samui

Sun 26/10

07:00-07:30

2 stops30h 30m

£763

LondonKo Samui

LCY - USM

LCYUSM

London City

Wed 14/5

17:10-18:15

2 stops19h 05m

Ko Samui

Thu 22/5

08:45-07:15

2 stops28h 30m

£765

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Wed 14/5

21:35-20:30

1 stop16h 55m

Ko Samui

Thu 29/5

08:45-19:20

1 stop16h 35m

£779

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Tue 3/6

09:00-11:55

2 stops20h 55m

Ko Samui

Tue 17/6

15:25-06:40

2 stops45h 15m

£782

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Tue 20/5

13:45-13:45

2 stops18h 00m

Ko Samui

Tue 3/6

16:25-11:25

2 stops25h 00m

£788

LondonKo Samui

LGW - USM

LGWUSM

London Gatwick

Thu 15/5

18:40-21:10

2 stops20h 30m

Ko Samui

Sun 15/6

16:25-17:50

2 stops31h 25m

£817

LondonKo Samui

LHR - USM

LHRUSM

London Heathrow

Fri 26/9

21:25-07:20

1 stop27h 55m

Ko Samui

Sun 26/10

07:55-20:35

1 stop18h 40m

£824

Flights are sorted by cheapest return flights first.

Deals found on 11/4

Showing 1-10 of 39 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 11 April 2025.

The best time to book flights from London to Ko Samui is 11 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 £1,621). 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 12 April 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 12 May 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.

Rainfall in Ko Samui by month

Plan your trip to Ko Samui by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ko Samui ranges from 58.0 - 490.0 inches per month. November is typically the wettest month, when rainfall can reach 490.0 mm. February is typically the driest time to visit Ko Samui when rainfall is around 58.0 mm.

Temperature in Ko Samui by month

Plan your trip to Ko Samui by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ko Samui, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 29.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 27.0 C).

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 12 April 2025.
Read reviews from past customers who have flown EVA Air, Singapore Airlines and Emirates from London to Ko Samui. 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
1,172 reviews
Check prices

Overall

8.4

Food

8.1

Crew

8.6

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
EVA Air
8.4
Very Good
1,172 reviews
EVA Air
8.4
Very Good
1,172 reviews
Check prices

Overall

8.4

Food

8.1

Crew

8.6

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Singapore Airlines
8.1
Very Good
1,288 reviews
EVA Air
8.4
Very Good
1,172 reviews
Check prices

Overall

8.4

Food

8.1

Crew

8.6

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Emirates
8.0
Very Good
3,197 reviews
EVA Air
8.4
Very Good
1,172 reviews
Check prices

Overall

8.4

Food

8.1

Crew

8.6

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
KLM
7.8
Good
1,321 reviews
EVA Air
8.4
Very Good
1,172 reviews
Check prices

Overall

8.4

Food

8.1

Crew

8.6

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Thai Airways
7.7
Good
322 reviews
EVA Air
8.4
Very Good
1,172 reviews
Check prices

Overall

8.4

Food

8.1

Crew

8.6

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.

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 10 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, Austrian Airlines (£756), SWISS (£759), and KLM (£762) offers the cheapest pricing from London to Ko Samui. Users have found that Austrian Airlines is 19% 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 Emirates, with whom users have recently found tickets for as low as £484. However, be on the lookout for offers from SWISS 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 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, Thailand Cultural Center, and Siam Square are currently the most popular points of interest in Bangkok at the moment. Pratunam, Thailand Cultural Center, and Siam Square are located about 14.8 mi, 13.1 mi, and 15.1 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 £1,621). 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 Tao
Ko Pha Ngan

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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 12 April 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 12 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest£613Average£757FlexibilityNo cancel feeOn-time77%
Search Air France flights
KLMCheapest£628Average£694FlexibilityNo cancel feeOn-time75%
Search KLM flights
Etihad AirwaysCheapest£640Average£711FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Singapore AirlinesCheapest£695Average£1,069FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Austrian AirlinesCheapest£713Average£857FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
EVA AirCheapest£735Average£826FlexibilityNo cancel feeOn-time74%
Search EVA Air flights
British AirwaysCheapest£750Average£1,051FlexibilityNo cancel feeOn-time70%
Search British Airways flights
EmiratesCheapest£784Average£844FlexibilityNo cancel feeOn-time75%
Search Emirates flights
Qatar AirwaysCheapest£799Average£1,182FlexibilityNo cancel feeOn-time68%
Search Qatar Airways flights
Thai AirwaysCheapest£803Average£1,049FlexibilityNo cancel feeOn-time77%
Search Thai 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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