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Cheap flights from London to Koh Samui from £456

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 15/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — USM
26 Feb — 5 Mar1
1 adult

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 Tuesday

Cheap flight deals from London to Koh Samui

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Koh 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 21 February 2025.

Round-trip from

£798

One-way from

£456

Popular in

December

Cheapest in

September

Average price

£897
Etihad Airways
  • Etihad Airways
  • 1/4-11/4
  • 4 total stops
  • 50h 55m total
  • London to Koh Samui
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15/4
  • 15/4
  • 2 total stops
  • 25h 50m total
  • London to Koh Samui
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£34 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2025
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Find flight deals from London to Koh Samui

Cheapest flights from London to Koh Samui
Explore the most affordable flight options available from London to Koh Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 February 2025.

Mon 1/1210:30LGW - USM
2 stops22h 05mMultiple Airlines
Sun 7/1209:20USM - LGW
2 stops28h 10mMultiple Airlines
Deal found 20/2£795
Tue 1/420:55LHR - USM
2 stops31h 35mEtihad Airways
Fri 11/417:25USM - LHR
2 stops19h 20mEtihad Airways
Deal found 19/2£798
Sat 1/320:05LHR - USM
2 stops17h 40mOman Air
Sat 8/317:40USM - LHR
2 stops31h 45mOman Air
Deal found 20/2£802
Wed 12/310:55LHR - USM
1 stop24h 35mMultiple Airlines
Mon 12/517:55USM - LHR
2 stops31h 15mMultiple Airlines
Deal found 20/2£814
Tue 1/414:20STN - USM
3 stops24h 25mMultiple Airlines
Tue 29/408:00USM - STN
3 stops45h 45mMultiple Airlines
Deal found 20/2£818
Mon 28/421:35LHR - USM
1 stop17h 10mEVA Air
Mon 26/509:15USM - LHR
1 stop16h 05mEVA Air
Deal found 20/2£820
Tue 27/510:15LGW - USM
1 stop18h 55mSingapore Airlines
Wed 4/608:45USM - LGW
1 stop27h 40mSingapore Airlines
Deal found 20/2£827
Thu 13/1114:05STN - USM
2 stops18h 30mEmirates
Thu 27/1119:10USM - STN
2 stops23h 55mEmirates
Deal found 20/2£827
Mon 1/1211:50LHR - USM
1 stop36h 20mThai Airways
Sun 7/1207:00USM - LHR
1 stop19h 35mThai Airways
Deal found 21/2£848
Tue 27/510:05LGW - USM
2 stops19h 35mEmirates
Wed 4/608:45USM - LGW
2 stops28h 35mEmirates
Deal found 20/2£863
Mon 24/210:55LHR - USM
1 stop24h 35mSingapore Airlines
Fri 4/408:45USM - LHR
1 stop37h 00mSingapore Airlines
Deal found 20/2£869
Thu 8/513:05LCY - USM
2 stops26h 05mSWISS
Thu 22/516:25USM - LCY
2 stops31h 05mSWISS
Deal found 20/2£870

Find flights from London to Koh Samui within your budget

Customise your flight search to find flights from London to Koh 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 21 February 2025.

Fly from

London

Fly to

Koh Samui

Route

Depart

Return

Price

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

Tue 1/4

20:55-10:30

2 stops31h 35m

Ko Samui

Fri 11/4

17:25-06:45

2 stops19h 20m

£798

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

Wed 12/3

10:55-18:30

1 stop24h 35m

Ko Samui

Mon 12/5

17:55-19:10

2 stops31h 15m

£814

LondonKoh Samui

STN - USM

STNUSM

London Stansted

Tue 1/4

14:20-20:45

3 stops24h 25m

Ko Samui

Tue 29/4

08:00-23:45

3 stops45h 45m

£818

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

Mon 28/4

21:35-20:45

1 stop17h 10m

Ko Samui

Mon 26/5

09:15-19:20

1 stop16h 05m

£820

LondonKoh Samui

LGW - USM

LGWUSM

London Gatwick

Tue 27/5

10:15-11:10

1 stop18h 55m

Ko Samui

Wed 4/6

08:45-06:25

1 stop27h 40m

£827

LondonKoh Samui

LGW - USM

LGWUSM

London Gatwick

Wed 12/3

16:35-20:45

3 stops21h 10m

Ko Samui

Mon 12/5

10:55-06:40

2 stops25h 45m

£838

LondonKoh Samui

LGW - USM

LGWUSM

London Gatwick

Tue 27/5

10:05-11:40

2 stops19h 35m

Ko Samui

Wed 4/6

08:45-07:20

2 stops28h 35m

£863

LondonKoh Samui

LCY - USM

LCYUSM

London City

Thu 8/5

13:05-21:10

2 stops26h 05m

Ko Samui

Thu 22/5

16:25-17:30

2 stops31h 05m

£870

LondonKoh Samui

LGW - USM

LGWUSM

London Gatwick

Sat 24/5

09:00-10:30

2 stops43h 30m

Ko Samui

Wed 11/6

14:30-06:40

2 stops22h 10m

£886

LondonKoh Samui

LHR - USM

LHRUSM

London Heathrow

Tue 20/5

12:10-12:45

2 stops18h 35m

Ko Samui

Tue 3/6

09:15-21:45

2 stops18h 30m

£901

Flights are sorted by cheapest return flights first.

Deals found on 20/2

Showing 1-10 of 46 results
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Best time to book a flight from London to Koh Samui

Have a flexible travel schedule? Discover the best time to fly to Koh 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.

Travel insights for flights from London to Koh Samui

Get recent, data-driven insights about flights from London to Koh Samui including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a return flight from London to Koh Samui. Price data was last updated on 14 February 2025.

To ensure you get the cheapest price possible for a flight from London to Koh Samui, you should look to book at least 11 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, August is the cheapest month in which you can book a flight from London to Koh Samui (average of £1,019). Flying from London to Koh Samui in December is currently the most expensive (average of £1,594). 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 Koh Samui. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 February 2025.

It’s optimal to fly from London to Koh Samui in the afternoon. By choosing this option you can save up to 40% on the cost of your flight, compared to a flight in the morning.

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

Use this chart to determine the cheapest time to fly return from London to Koh Samui. Price data was last updated on 12 May 2024.

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

Rainfall in Koh Samui by month

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

In terms of precipitation, rainfall in Koh 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 Koh Samui when rainfall is around 58.0 mm.

Temperature in Koh Samui by month

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

If weather is an important factor for your trip to Koh 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 Koh Samui

Get insights into the airlines that provide service to Koh 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 Koh Samui. Reviews last updated 21 February 2025.
Read reviews from past customers who have flown EVA Air, Emirates and Singapore Airlines from London to Koh 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
1,200 reviews
Check prices

Crew

8.6

Entertainment

8.0

Overall

8.4

Food

8.0

Boarding

8.4

Comfort

8.2

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

EVA Air
8.4
Very Good
1,200 reviews
EVA Air
8.4
Very Good
1,200 reviews
Check prices

Crew

8.6

Entertainment

8.0

Overall

8.4

Food

8.0

Boarding

8.4

Comfort

8.2

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Emirates
8.1
Very Good
3,279 reviews
EVA Air
8.4
Very Good
1,200 reviews
Check prices

Crew

8.6

Entertainment

8.0

Overall

8.4

Food

8.0

Boarding

8.4

Comfort

8.2

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Singapore Airlines
8.1
Very Good
1,299 reviews
EVA Air
8.4
Very Good
1,200 reviews
Check prices

Crew

8.6

Entertainment

8.0

Overall

8.4

Food

8.0

Boarding

8.4

Comfort

8.2

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

KLM
7.8
Good
1,333 reviews
EVA Air
8.4
Very Good
1,200 reviews
Check prices

Crew

8.6

Entertainment

8.0

Overall

8.4

Food

8.0

Boarding

8.4

Comfort

8.2

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Related info for your journey

Find useful and relevant information for your journey from London to Koh 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 Koh Samui from London?

    Most people fly into Ko Samui (USM) if they book a flight to Koh Samui from London. On average, Ko Samui has 0 inbound flights from London per day from 11 airlines. Ko Samui is conveniently located just 2.1 mi from Koh Samui’s city center.

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

    Our cheapest airline available from London to Koh Samui is Etihad Airways. Our recent data shows that you can find tickets from as low as £798 on this airline. Additional options worth looking into are Oman Air and EVA Air, starting at £802 and £820 round-trip. Etihad Airways is priced at 17% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from London to Koh Samui one-way?

    One-way options have recently been found by users for as low as £464 on Etihad Airways. Other airlines that offer cheap prices include Gulf Air from £473 and Emirates from £488 one-way.

  • What are the most popular routes from London to Koh Samui?

    The most popular route from London to Koh 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 Koh Samui?

    The most popular stopover on flights from London to Koh Samui is Bangkok.

  • What are some popular things to do or see while on a stopover in Bangkok?

    If you're on a stopover in Bangkok and looking for things to do, consider visiting Pratunam, Thailand Cultural Center, or Patpong Night Market. Pratunam, Thailand Cultural Center, and Patpong Night Market can be accessed by travelling approximately 14.8 mi, 13.1 mi, and 14.9 mi, respectively from Bangkok Suvarnabhumi. Travellers can rent a car at Bangkok Suvarnabhumi for an average daily rate of £23 to make sightseeing during their stopover a little easier.

  • Where are the least popular stopover locations for London to Koh Samui flights?

    The least popular stopover on flights from London to Koh Samui is Singapore.

  • Can I find deals for flights from London to Koh Samui that include hotel bookings?

    Yes. In addition to deals on London to Koh Samui flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Koh Samui?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Koh Samui.

  • Can I find deals for business class flights from London to Koh Samui?

    Yes. Cheapflights offers flight deals from London to Koh 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 Koh Samui?

    Currently, August is the cheapest month in which you can book a flight from London to Koh Samui (average of £1,019). Flying from London to Koh Samui in December is currently the most expensive (average of £1,594). 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 Koh Samui on these airlines

Choose from the following airlines for your flight from London to Koh Samui. Flights are based on user searches made on Cheapflights and were last updated on 21 February 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 Koh Samui

Discover the top 10 airlines that operate flights from London to Koh 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 21 February 2025.
AirlineCheapestAverageFlexibilityOn-time
Bangkok AirwaysCheapest£106Average£172FlexibilityNo cancel feeOn-time74%
Search Bangkok Airways flights
Air FranceCheapest£635Average£783FlexibilityNo cancel feeOn-time77%
Search Air France flights
KLMCheapest£650Average£755FlexibilityNo cancel feeOn-time75%
Search KLM flights
Etihad AirwaysCheapest£662Average£734FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Singapore AirlinesCheapest£699Average£1,116FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
EVA AirCheapest£757Average£874FlexibilityNo cancel feeOn-time74%
Search EVA Air flights
Austrian AirlinesCheapest£772Average£920FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
British AirwaysCheapest£773Average£1,074FlexibilityNo cancel feeOn-time70%
Search British Airways flights
EmiratesCheapest£812Average£875FlexibilityNo cancel feeOn-time75%
Search Emirates flights
Qatar AirwaysCheapest£827Average£1,220FlexibilityNo 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 Koh Samui?

When you search for this flight from London to Koh 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 Koh Samui?

Cheapflights simply makes it quick and affordable to book flights from London to Koh 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 Koh Samui with no change fees?

Need flexible booking options for your flight to Koh 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 Koh Samui become cheaper?

Not ready to book yet? You can track prices for flights from London to Koh Samui on Cheapflights with our Price Alert feature and get notified when better prices are available.

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