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LON - USM

Find cheap flights from London to Koh Samui from £342

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to Koh Samui departing on 31/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Thu 23/5
Thu 30/5

Search hundreds of travel sites at once for deals on flights to Koh Samui

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Koh Samui.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Koh Samui.
In the last 7 days, travellers have searched 44,632,927 times on KAYAK, and here's why:

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Cheap flight deals from London to Koh Samui (LON-USM)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from London to Koh Samui that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
12:35 - 21:35LGW-USM
27h 00m2 stops
07:00 - 06:35USM-LGW
29h 35m2 stops
Mon, 3 Jun - Sun, 16 Jun
20:25 - 21:35LHR-USM
19h 10m2 stops
21:15 - 20:30USM-LHR
29h 15m2 stops
Mon, 3 Jun - Sun, 16 Jun
11:45 - 12:45LHR-USM
19h 00m2 stops
10:55 - 08:00USM-LHR
27h 05m2 stops
Mon, 27 May - Mon, 3 Jun
21:50 - 08:35LHR-USM
28h 45m2 stops
07:00 - 18:45USM-LHR
17h 45m2 stops
£706Etihad Airways
Find Deal
Thu, 5 Sep - Thu, 26 Sep
21:50 - 07:20LHR-USM
27h 30m2 stops
19:00 - 18:45USM-LHR
29h 45m2 stops
£707Etihad Airways
Find Deal
Sun, 29 Sep - Sun, 6 Oct
21:35 - 20:55LHR-USM
17h 20m1 stop
08:45 - 19:25USM-LHR
16h 40m1 stop
£797EVA Air
Find Deal
Wed, 22 May - Wed, 29 May
21:35 - 20:55LHR-USM
17h 20m1 stop
08:00 - 19:25USM-LHR
17h 25m1 stop
£801EVA Air
Find Deal
Tue, 28 May - Fri, 7 Jun
09:00 - 10:10LGW-USM
19h 10m2 stops
15:50 - 06:40USM-LGW
20h 50m2 stops
£838Qatar Airways
Find Deal
Sun, 1 Sep - Sun, 15 Sep
09:00 - 10:10LGW-USM
19h 10m2 stops
15:50 - 06:40USM-LGW
20h 50m2 stops
£882Qatar Airways
Find Deal
Sat, 31 Aug - Sat, 14 Sep
21:25 - 20:55LHR-USM
17h 30m1 stop
08:45 - 07:15USM-LHR
28h 30m1 stop
£931Thai Airways
Find Deal
Fri, 28 Jun - Sat, 13 Jul

Flights from London to Koh Samui - Travel Insights & Trends

Get data-powered insights and trends into flights from London to Koh Samui to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from London to Koh Samui?

The average price of all flights from London to Koh Samui clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from London to Koh Samui, look for departures on Mondays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Koh Samui, Monday is the cheapest day to fly and Thursday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from London to Koh Samui, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from London to Koh Samui is May, where tickets cost £865 on average. On the other hand, the most expensive months are December and July, where the average cost of tickets is £1,497 and £1,219 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from London to Koh Samui, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from London to Koh Samui, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 79 days before departure.

Which airlines provide the cheapest flights from London to Koh Samui?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from London to Koh Samui found on KAYAK was with Gulf Air for £528. Etihad Airways proposed a return connection from £706 and Gulf Air from £772.

Good to know - Cheap tickets from London to Koh Samui

Low season

October

High season

February

Cheapest flight

£342
Best time to beat the crowds (9% less expensive on average)
Most popular time to fly and prices are also 6% lower on average.
Flight from London Luton Airport to Koh Samui

When to book flights from London to Koh Samui

Are your dates flexible? Find out the best times to travel from London to Koh Samui based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from London to Koh Samui

  • Are some flights on this route more carbon efficient than others?

    Thai Airways is a good airline to choose if you're looking to reduce your carbon footprint on your flight from London to Koh Samui. Typically leaving twice daily, just after noon and in the evening, these flights emit as around 35% less CO2 than a standard one. This is a one-stop route that takes around 14-16 hours. You'll stop at Bangkok Suvarnabhumi Airport (BKK) for about 1 hour to change planes.

  • Do the airports offer limited-mobility assistance?

    All London airports conform to the UK's national accessibility requirements. They are fully wheelchair accessible and also have facilities for travellers with hidden disabilities, like induction loops. Yellow lanyards are available to make it easier for assistance staff to spot you. You can also book personal assistance (at least 48 hours in advance) through your airline or travel agent. Koh Samui Airport is fully wheelchair accessible, with dedicated assistance for people with decreased mobility. Staff are constantly on hand and there's no need to book.

  • Can I hire a car at Koh Samui International Airport?

    About a half dozen of the world's most popular car hire companies have branches at Koh Samui Airport. It's a relatively small airport, so you won't have any trouble spotting these in the Arrivals terminal once you've claimed your luggage and passed through customs. As car stocks are limited, it's wise to book in advance.

  • How do I get from Koh Samui International Airport to the town centre?

    Koh Samui Airport is near the town of Bo Phut, a little way north of the island's main city of Chaweng. If you don't hire a car, your transport options to get to Bo Phut are to catch a taxi or an airport shuttle, both of which take about 10 minutes to make the trip. Getting directly to Chaweng takes roughly the same amount of time using the same transport modes, give or take a couple of minutes.

  • What is the cheapest flight from London to Koh Samui?

    In the last 3 days, the lowest price for a flight from London to Koh Samui was £422 for a one-way ticket and £776 for a return.

  • Which airports will I be using when flying from London to Koh Samui?

    London has 5 major airports: London City, London Gatwick, London Heathrow, London Luton, and London Stansted. Ko Samui is the only airport in Koh Samui. You’ll usually find the cheapest deals if you fly from London Heathrow Airport.

  • Which aircraft models fly most regularly from London to Koh Samui?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from London to Koh Samui?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between London and Koh Samui, with Star Alliance being the most commonly used for this route.

  • What is the most popular stopover when flying to Koh Samui from London?

    Bangkok is the most popular stopover city among KAYAK users travelling from London to Koh Samui.

  • Which is the best airline for flights from London to Koh Samui, EVA Air or Singapore Airlines?

    The two airlines most popular with KAYAK users for flights from London to Koh Samui are EVA Air and Singapore Airlines. With an average price for the route of £923 and an overall rating of 8.3, EVA Air is the most popular choice. Singapore Airlines is also a great choice for the route, with an average price of £958 and an overall rating of 8.2.

  • How does KAYAK find such low prices on flights from London to Koh Samui?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to Koh Samui.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to Koh Samui?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Koh Samui from London is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London to Koh Samui?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Koh Samui with an airline and back to London with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to Koh Samui?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Koh Samui from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from London to Koh Samui

  • Koh Samui is a resort island off Thailand's coast. To visit mainland cities like Phuket and Bangkok, you can catch one of the dozens of daily flights on Bangkok Airways or Thai AirAsia.
  • If you're flying to Koh Samui with children, Heathrow (LHR) and Gatwick (LGW) are convenient airports. They have supervised Stay & Play areas and Kids' Zones, where youngsters can amuse themselves while waiting for your flight.
  • EVA Air offers one of the more comfortable economy-class flights from London to Koh Samui. You can enjoy on-demand video, with power and USB outlets built into your seat. You'll generally also be served a meal.
  • Koh Samui Airport (USM) is owned and operated by Bangkok Airways, the main local Thailand air carrier. This allows you to easily and inexpensively catch connecting domestic flights to cities in the rest of the country.
  • Choose your London airport based on where you're coming from. Heathrow is on the western outskirts, with Stansted (STN) quite a way north. Gatwick is about 30 minutes south of London, while London City Airport (LCY) is close to Central London.
See more tips

Top 5 airlines serving from London to Koh Samui

 
See real verified KAYAK customer reviews for airlines flying from London to Koh Samui. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from London to Koh Samui? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.3
EVA AirOverall score based on 1557 reviews
8.2comfort
8.6crew
8.0entertainment
7.9food
8.4boarding
Airline reviews

Fast and efficient boarding. Flight was on time. Service was very good for our long flight. First time flying with this airline and I would highly recommend.

10.0 ExcellentDamian, Mar 2024LAX - TPE
Read more about EVA Air reviews

Fast and efficient boarding. Flight was on time. Service was very good for our long flight. First time flying with this airline and I would highly recommend.

Eva Air's Business Class is pretty decent. With the given price, I think that the food can be better.

Eva air is a good airline. The seats on the way to Taipei could have certainly been more comfortable, but all in all it was a pretty good experience.

Fast boarding process. Flight was expected for a long haul economy flight

Boarding is fast and easy for economy class, food was ok baggage policies are good

EVA would not help with ticket issue since they were purchased through a travel agency. Even though it was EVA ticket stock. Travel agency Budget Air didn't reissue ticket after airline change which I didn’t learn until trying to checkin on Christmas Day and there was no contact number for the agency to help. I will never use Budget Air to purchase flight again and disappointed in EVA’s refusal to help. Thankfully just under 12 hrs before departure someone from the agency was available to reissue tickets. I was starting to think we would not be flying and the stress trying to resolve was completely unacceptable.

My original flight was rescheduled & EVA did a good job rescheduling my flight & connecting flight.

Everything was fantastic! The crew really went above and beyond to make it a great flight. I felt cared for with EVA.

Everything was fantastic! It was a short flight but the crew really went above and beyond to make it a great flight. I felt cared for with EVA.

My experience with Eva sir was good except the long walk in LA Lex, that was inconvenient for my age,

Extra seat belt across the chest 10 minutes before taking off and 15 minutes before landing seemed excessively safe.

The transfer from Domestic and International was a bit confusing but I am easily confused. I did not eat any food, but the food on the other leg was decent. It was nice they turned the lights off on the night flight. The plane was in good shape, but was a little cramped in economy and I am small. They gave me a customs form to fill out and nobody looked at it as I went through customs. Not a bad flight.

We are satisfied with the cabin crew serviceand the quality of meals served.

Lunch Food was tasteful and had variety. Seat was comfortable. However, when I was reserving my seats during booking, the seat configuration showed was 3-3-3, but when I boarded it was a 2-4-2 configuration? Also during booking, I had also bought travel insurance together with my TG booking. However there was no confirmation of my purchase from Allianz and TG. After several emails with TG contact, sales, reservation and Allianz was i able to confirm my insurance purchase. When the policy was issued, the birth dates of me and my wife were wrongly stated and I had to go through another round of emails with Allianz to get it corrected. Otherwise any claims would be void! It was indeed not a very good booking experience!

Check in was a disaster. 90 minutes and only 2 economy check in desks open. Had to rush to catch the flight.

I couldnt go on this flight and lost all my money over 1,000 UK Pounds as my visa to Myanmar was not accepted :(

Thai Airways is one of the best airlines in the business. Looking forward to fly again with them.

After going back and forth with the airline, they never reimbursed the airline tickets. Went around asking multiple people how to get reimbursed and kept getting put back, not satisfied with their customer service.

No working jet bridge to deplane, with priority customers deplaning last. Followed by bus to terminal.

Efficient like all the other flights with them. An outstanding budget airline!

I staff or crew they were very friendly and humbly, they done theirs service very well, I appreciate them and thank you to the company or Qatar 🇶🇦 Government for providing as good service in their flight ,once again, thank you 😊 🙏 😀 😉 👍

There’s lots of problem I faced from Bom to Doha that experience was worst I never faced before like this

From Montreal to Doha , we habe two complaints : 1) They want to charge for Seat Selection, claiming that the Class of ticket bought on Kayak did not cover seat selection. It such a penny pinching rule, I told them, since we paid almost $20,000 our 3 tickets , that rule should never exist. Also I reserved my tickets so many months ahead, I expected they will naturally put the family together or move somebody else to keep our family seating together. I filed a complaint, and NOBODY ANSWERED. 2) In Montreal, Qatar has an arrangement with the National Bank Lounge. It was so overcrowded and the Lounge is so bad in terms of service and food, amenities etc... The WORST lounge . Why Qatar not have another arrangement their Business Class clients in Montreal. The Air France KLM Lounger is better, the Air Canada Lounge is better. Qatar should send somebody to take a look ! Joseph Chung

Overall it was a very good experience. Boarding was efficient and well organized. The cabin crew were excellent. The meals were tasty and quite filling. The warm bread rolls were a nice touch. Seats were comfortable even if they were a little narrow. Entertainment selection was excellent.

This is my first and last flight with Qatar because when we go for boarding pass in Delhi airport the team asked for money charging me for hand baggage which is technically including with my ticket so also we get one our temple pics I ask them to checking in but they tell me I have to pay $500 dollars for that additional which is not make sense than I diseased to throw away because I can’t take with us . For carry in beg also I pay some Indian n currency for the guy who help I already pay 6 passengers ticket cost me $8000 so really I’m not happy . PLUS MY 6 checked baggage was damaged I already claim for four beg at airport but now I’m worried about my stuff inside maybe broken too which is more expensive stuff me really bad experience

The flight was good but my neighbor had the vent open full power for the whole flight and because the air was blowing from the side instead of from the top and I got very cold and ended up with a sore throat.

It was pretty good overall. I just wish the crew didn't have to interrupt you every five seconds to ask you if you wanted anything, I mean that's what the help button is for. When someone is tired and sleepy and still getting their bearings, turning on DND button is maybe not the first thing on their mind.

I didn't understand why I got dropped off at departures on exiting the plane at Doha aiport. I had to find my own way to immigration/baggage reclaim which wasn't easy as staff in the departure section just tell you ti scan your boarding pass. This was very poor b qatar Airways. I spent 2 hours soyung this out and once I got to get my suitcase it was delayed. So instead of getting to the hotel at about midnight I got there at three in the morning. I wonder why I upgraded to business?

From home to the airport, you must mention the terminal ready.

Crews are very rude and unhelpful. Cramped seats in economy. Foods are useless

Overall mediocre experience. Check in was good. They're were discriminatory. They were not attentive, food choices were not vegetarian friendly. The food served was frozen.

1st time with. Etihad Airways and it was amazing from check in to crew. Great flight.

Good range of movies but lacking decent tv shows. Wifi was really expensive on this flight, considering flights under 7 hours have a $9.99 USD charge for streaming, to jump up to $24.99 for a 7 hour 40 flight seemed a little bit of a rip off. Staff are inattentive, and really need to improve on the customer experience. The new airport is fantastic, as is the new lounge, a huge upgrade from the old airport and lounge!

Good range of movies but lacking decent tv shows. Wifi was really expensive on this flight, considering flights under 7 hours have a $9.99 USD charge for streaming, to jump up to $24.99 for a 7 hour 40 flight seemed a little bit of a rip off. Staff are inattentive, and really need to improve on the customer experience.

It has been a couple of years since I flew with Etihad last, after having a unpleasant experience with them coming out of the pandemic. I can say that the experience has uplifted, but I can’t really rate the service. At Barcelona airport the service was great, with their dedicated Etihad staff very helpful. The onboard experience wasn’t great, not very personalised and it really makes sense why Etihad doesn’t feature in the top 10 2023 Skytrax awards. The crew just seemed to be inattentive and almost absent from the cabin. I felt that I had to keep getting their attention. Even after I’d finished my meal, an hour went by before I had to call them to clear the tray/plate etc.

The staff was very nice and polite but it was very very hot and no ways to have some fresh air. It would be nice to have more time to sleep since it was a night flight

The staff was kind and polite, but it was very very hot and no ways to have some fresh air.it would be also be nice to have more time to sleep, since it was a night flight

One thing is very important is you people not giving seat arrangement together to couple, senior citizen. You have to take care of senior citizen. Do not look about money. Money is not important everywhere. Make relationship strong is very very important. I like Etiyad air line out of all air line. Food was hot and delicious. Air hostess gave very good service, nice attitude, very good behaviour. I gave 10 out of 10 marks. Thanks Jivraj

1.Aircraft Comfort: The aircraft type was quite small with non-reclining, cramped seats that significantly lacked comfort. 2.In-flight Entertainment: There was no provision of in-flight entertainment screens or Wi-Fi for the majority of the flight. 3.Boarding Process at New Abu Dhabi Airport: Despite the move to a new airport, which promised enhanced experiences, the use of buses instead of jet bridges did not meet expectations, causing inconvenience. 4.Gate Change Communication: A last-minute gate change was poorly communicated, resulting in a long and difficult walk.

Very unfriendly team. It was very difficult to get a cup of coffee. Legroom was extremely small. Old, dilapidated plane.

Self check in Kiosk did not recognize that I had prepaid for my luggage. This caused a 40 minute delay even though I had my British Airways email receipt for the prepaid luggage.

Crew were very friendly and helpful. They explained to us in detail the delay in our takeoff due to the storm that rolled in from Belfast and did their best to make up the time. Always great to fly BA!

Staff were very helpful. The free WiFi for messages was also very useful to keep in touch

Crew was more interested on looking at their phones than welcoming passengers during boarding.

The crew was very attentive and kept busy serving a variety of treats!

Terrible. Missed my flight to final destination because of delayed British Airways flight. Had to spend 12 hours in airport and $1500 for new plane tickets

The crew on board were all very pleasant and happy to help. The flight had the old business class seats. The departure board in the business lounge did not update and kept on saying ' gate open' but never said boarding. When I got nervous about the departure time and walked to the gate I was told off rudely for being late.

Offered vegetable curry when it was actually tofu which I don’t care for.

The flight was good the crew excellent…but take off delayed three hours!!!

The boarding process was a disaster. No one respects the boarding groups—tired old aeroplane. There are no sockets to charge phones. The cushion seats are ancient and hurts back and gluts

Book cheap flights from London to Koh Samui

Cheapest flights to Koh Samui from London found in 2024

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from London to Koh Samui found on KAYAK in the last 72 hours.
31/5Fri
3 stops
52h 50mLTN-USM
£342
22/5Wed
3 stops
54h 05mLGW-USM
£345
30/4Tue
1 stopEVA Air
16h 55mLHR-USM
£530
1/5Wed
1 stopEVA Air
17h 20mLHR-USM
£531
30/4Tue
1 stopThai Airways
18h 10mLHR-USM
£593
13/7Sat
1 stopSingapore Airlines
28h 00mLHR-USM
£792
25/7Thu
1 stopThai Airways
14h 20mLHR-USM
£797
13/7Sat
2 stopsEmirates
41h 30mLGW-USM
£805
19/8Mon
1 stopSingapore Airlines
29h 00mLGW-USM
£850
13/7Sat
2 stopsEmirates
42h 05mSTN-USM
£852

Search by stops

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Last minute flights from London to Koh Samui

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from London to Koh Samui that are departing in the next 10 days.
26/4Fri
multi-stopEVA Air
16h 55mLHR-USM
16/5Thu
multi-stopEVA Air
17h 25mUSM-LHR
£820
26/4Fri
multi-stop
28h 50mLGW-USM
16/5Thu
multi-stop
24h 45mUSM-LGW
£838
26/4Fri
multi-stopEtihad Airways
29h 20mLHR-USM
16/5Thu
multi-stopEtihad Airways
23h 45mUSM-LHR
£879
26/4Fri
multi-stopGulf Air
40h 15mLHR-USM
16/5Thu
multi-stopGulf Air
28h 10mUSM-LHR
£927
26/4Fri
multi-stop
20h 05mLHR-USM
16/5Thu
multi-stop
16h 10mUSM-LHR
£977
26/4Fri
multi-stopGulf Air
40h 15mLHR-USM
16/5Thu
multi-stopGulf Air
39h 40mUSM-LHR
£979
26/4Fri
multi-stop
17h 45mSTN-USM
16/5Thu
multi-stop
21h 45mUSM-STN
£1,011
26/4Fri
multi-stopQatar Airways
35h 20mLGW-USM
16/5Thu
multi-stopQatar Airways
45h 15mUSM-LGW
£1,070
24/4Wed
multi-stopAustrian Airlines
26h 40mLHR-USM
27/4Sat
multi-stopAustrian Airlines
25h 05mUSM-LHR
£1,700
26/4Fri
multi-stopKLM
23h 25mLCY-USM
16/5Thu
multi-stopKLM
17h 30mUSM-LCY
£2,468

Search by stops

Search by airline

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London - Koh Samui Flights

Destination:

Koh Samui (USM)Thailand

Return flight deals:

Koh Samui - London

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