LON - USM

£260 Find Cheap Flights from London to Ko Samui

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 Ko Samui departing on 22/2. 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
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ko Samui

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Ko Samui.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Ko Samui.
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Everything you should know

Cheapest return fare
£726
Overall average: £861
Etihad Airways
Mon 23/2Wed 4/3
LHR - USM • 2 stops
Cheapest one-way flight
£268
Multiple Airlines
Sun 22/2
LTN - USM • 3 stops
Video guide: How to find cheap flights to Ko Samui
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Top airlines
British Airways
Cheapest • from £731 (return)
EVA Air
Best reviews • 8.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travellers who book at least 4 weeks in advance save around 27% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
May
Cheapest • 12% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches hundreds of sites at once to find you the best travel deals.
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from London to Ko Samui (LON-USM)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from London to Ko 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 for you by selecting your travel dates on KAYAK.

Recent return flight deals from London to Ko Samui

Mon, 23 Feb - Wed, 4 Mar
Etihad Airways Logo
19:20 - 18:15
LHR
-
USM
39h 55m
2 stops
Etihad Airways Logo
08:50 - 14:30
USM
-
LHR
60h 40m
2 stops
£726Etihad Airways
Wed, 18 Feb - Fri, 27 Feb
Multiple Airlines Logo
08:05 - 18:25
LGW
-
USM
27h 20m
3 stops
Multiple Airlines Logo
08:55 - 23:55
USM
-
LGW
46h 00m
3 stops
£728Multiple Airlines
Fri, 6 Mar - Fri, 13 Mar
Multiple Airlines Logo
07:45 - 18:25
STN
-
USM
27h 40m
3 stops
Multiple Airlines Logo
18:05 - 11:00
USM
-
STN
23h 55m
2 stops
£728Multiple Airlines
Fri, 27 Feb - Tue, 10 Mar
Multiple Airlines Logo
10:35 - 18:15
LGW
-
USM
24h 40m
2 stops
Multiple Airlines Logo
08:15 - 06:30
USM
-
LGW
29h 15m
2 stops
£729Multiple Airlines
Fri, 1 May - Wed, 13 May
British Airways Logo
22:00 - 18:15
LHR
-
USM
38h 15m
1 stop
British Airways Logo
13:30 - 05:25
USM
-
LHR
21h 55m
2 stops
£730British Airways
Mon, 6 Apr - Thu, 7 May
British Airways Logo
19:25 - 21:10
LHR
-
USM
19h 45m
1 stop
British Airways Logo
13:30 - 05:25
USM
-
LHR
21h 55m
2 stops
£731British Airways
Mon, 4 May - Fri, 15 May
SWISS Logo
09:15 - 12:45
LGW
-
USM
21h 30m
2 stops
SWISS Logo
09:15 - 08:25
USM
-
LGW
29h 10m
2 stops
£732SWISS
Thu, 9 Apr - Sun, 10 May
British Airways Logo
22:00 - 21:10
LHR
-
USM
17h 10m
1 stop
British Airways Logo
13:30 - 05:25
USM
-
LHR
21h 55m
2 stops
£732British Airways
Sat, 9 May - Mon, 18 May
SWISS Logo
12:15 - 12:45
LCY
-
USM
18h 30m
2 stops
SWISS Logo
10:05 - 08:40
USM
-
LCY
28h 35m
2 stops
£734SWISS
Tue, 17 Mar - Thu, 26 Mar
KLM Logo
17:05 - 21:05
LCY
-
USM
21h 00m
2 stops
KLM Logo
16:25 - 09:30
USM
-
LCY
24h 05m
2 stops
£856KLM
Booking Insights

KAYAK's insights & trends for London to Ko Samui flights

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

Find cheap flights to Ko Samui
Find cheap flights to Ko Samui

Planning a trip from London to Ko Samui? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

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

The average price of all round-trip flights from London to Ko Samui clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Ko Samui on a Wednesday and more expensive on a Sunday. On your return trip to London, you should consider flying back on a Friday, and avoid Mondays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London to Ko 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 Ko Samui is May, where tickets cost £788 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is £1,157 and £1,055 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London to Ko Samui, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from London to Ko Samui, you should book around 4 weeks before departure, which saves you about 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Good to know - Cheap tickets from London to Ko Samui

Low seasonOctober
Cheapest flight£268
Best time to beat the crowds (11% less expensive on average)
Most popular time to fly and prices are also 5% lower on average.
Flight from London Luton Airport to Ko Samui

When to book flights from London to Ko Samui

Are your dates flexible? Find out the best times to travel from London to Ko 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 Ko 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 Ko Samui?

    In the last 3 days, the lowest price for a flight from London to Ko Samui was £260 for a one-way ticket and £726 for a return.

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

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

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

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

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from London to Ko Samui are EVA Air and Singapore Airlines. With an average price for the route of £826 and an overall rating of 8.4, EVA Air is the most popular choice. Singapore Airlines is also a great choice for the route, with an average price of £889 and an overall rating of 8.1.

  • How does KAYAK find such low prices on flights from London to Ko 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 Ko Samui.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ko 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 Ko 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 Ko 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 Ko 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 Ko Samui from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from London to Ko 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.

Reviews of the top 5 airlines flying from London to Ko Samui

 
See real verified KAYAK customer reviews for airlines flying from London to Ko 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 Ko 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.
8.4
EVA AirOverall score based on 1317 reviews
8.3Comfort
8.0Entertainment
8.4Boarding
8.1Food
8.6Crew
Airline reviews

My seat arrangement was good with Eva Air. The toilet sanitary was good ( hand wash, face moist spraying, fresh air spray, hair moisturizer). But the Asian movie selection was not great at all.

8.0 ExcellentAnonymous, Jan 2026
TPE - SFO
Read more EVA Air reviews

My seat arrangement was good with Eva Air. The toilet sanitary was good ( hand wash, face moist spraying, fresh air spray, hair moisturizer). But the Asian movie selection was not great at all.

Certain flight crew member were rude and short with me when I asked questions.

Excess baggage fees are outrageous ($250 per bag). Flight crew and planes are nice.

We were very impressed with the modern plane its amenities, as well as the services of flight attendants.

Everything was great, however the seats in the back are very small. Not as Comfortable as I would have liked.

Awful had to ask for a supervisor to sit with my flight companion even t booked the tickets together weeks before

Flight Attendants could have been nicer and food portions could be bigger.

Excellent service from check in to boarding the crew is so pleasant to asked

I have never heard of EVA air before but I am so happy my wife and I were able to flight on their planes twice. Everything on these flights just felt better than their competitors. As someone with longer legs any bit of extra leg spaces is appreciated. The different options for food and drinks were also a plus. They were extra careful to make sure my wife's eating restrictions were taken care for. They had a before take off and landing announcements on the built in tablets for each seat and it gave out information that was very helpful. Such as what and how to declare your items in the specific country you landed in, any odd items that may be illegal to bring it (and even the reasoning why) and any other information you might need to make your post flight experience better. Oh and the seats were more comfortable, had more ability to lean and the headrest was much better for flight sleeping. The only downside was there were "forced" ads on the tablet at take off for maybe 5-10 minutes but honestly, this flight was the cheapest option and had all the benefits listed above that is such an easy trade off. Im keeping an eye out for EVA air going forward.

First time traveling with EVA.. great experience in economy class... Personnel very friendly..

Food was served to different people at different times and it wasn't clear why. The crew apologized for the wait. But it felt odd and inconsistent. They could use charging ports on each of the seats. Mine didn't have any. Also, they could've offered more snacks. It was a 12+ hour flight and no snacks were ever offered. Everything else was OK.

No frills airline with minimal leg room and no entertainment

The flight arrived on time. 2×2 seating meant no one needed to sit in the middle. This was a connectibf flight from Singapore and required going to 3 counters in different levels to check a golf bag

The flight crew was phenominal! We couldn't have asked for any better. They were experienced professionals.

Pleasant business class flight experience with good onboarding experience. Flight service team was excellent with usual book-the-chef menu available

Food was just okay, need to improve for other menu variations

The consistency with Singapore Airlines is fantastic. Crew are always brilliant and food delicious in business class

Wish the underseat compartment don’t have a restriction, can fit a personal item such as backpack fully like most Boeing

Best airline I think. No problems with anything. Crew were great, no problems with the airline food and entertainment and a smooth flight.

Service was top notch and the attention to passengers is great. Takeoff and landing was on schedule. Food selection is good

business class is old but still done very well by the team.

Excellent airline. The plane was clean and the staff were very attentive

Good experience although the boarding gate is at the terminal extension hence need to leave lounge to head over earlier.

Thai Royal First is very good. Easy check in , Private room in the first class lounge and escort from ticketing to the plane. Once on board crew was very polite, food was outstanding, and the ride was smooth as silk. Restrooms were especially clean. Great Experience

I'm not interested in improving the airline. Therefore, I won't explain this in more detail. Next time I'll try a different one.

The flight (boarding) was delayed by 40-50 minutes and there was very crowed. They need to improve on the timeliness & boarding process. (They asked passenger to board in groups, but the 2nd group was standing there waiting for 20 minutes!). However, services from the crew was very good, also the food was good as well. I also found the legroom was quite comfortable.

Need to improve on punctuality. My flight was delayed by 1 hour.

Seats were uncomfortable and the vegetarian meal was awful. Some of the entertainment didn't work.

Except that our flight was cancelled, by mail, and later moved to 12 hours prior, then the experience was good. In Bangkok we were offered a hotel, it was fine, but would have been nice to know in advance😉

The flight was mostly fine, but I really wished that seats had an outlet to charge devices considering the length of the flight (15 hours there and 14 hours back).

Friendly and discreet staff. Could have done with a few more offers of water/snacks overnight. Movie and tv selection notably poor. Seats not especially comfortable

All great, because I was given a seat with extra legroom on this part of my trip.

I appreciated the vailability of wheelchair services for persons with mobility issues all the way up to the aircraft. What could be better would be the food choices.

Lobster starter in business class was not good, tough, served cold, and without butter. Movie selection was missing latest releases, did not offer older classic, high quality movies

My baggage is lost. Flight cancelled, Rebooked ticket through long routes. Mental stress, emotional hurt

My flight was delayed. I was rebooked twice and even the second flight that was additional connection in London was delayed too, so I ended up spending more than 24 hours flying between four different countries and to be honest I’m not sure whether I ever want to use this airline again. My luggage is still delete. It’s been more than 48 hours now so to be honest, I’m not even sure how to describe the level of frustration I have.

My entire row did not have power for the full duration of a 14.5 hour flight. Could not charge any devices such as laptop or phones for the entirety of the long flight. The flight attendants tried to remedy the issue by resetting the power, but were not successful. The only other solution provided was to move me to another seat on the plane which was in the middle row. I had paid for a “preferred” seat that was a window seat. This was a downgrade being offered due to the power issue.

I prebooked a comfort plus seat on this flight and therefore the flight was comfy. I got the correct seat in the correct section of the plane that I have booked, that's this. Flight was comfortable. Staff were average on the flight, appearing to be rushed and short in engagement with travellers, perhaps this to maximise there rest time on the flight.

Economy travel is really hard with no room to move especially when the person sitting beside you is an XL or XXL size person who if moving could hit your face

Overall the experience was neat with crew being nice and caring especially to parent with kids. The free snacks option was okay. The kiosk at Philly airport didn’t work.

Check-in experience, for business call please provide a premium experience

Lost my luggage, ran out of food choices in business class, ground crew was completely unapologetic.

Excellent. The crew and flight were great. Checking in was easy and everyone was very helpful.

Late. And service was very slow - passengers sat for well over an hour with dirty trays etc surrounding them

Entertainment devices on A380 need to be fixed, the seats might do with updates.

I like everything about British Airways. Excellence. Perfect. Exquisite service.

The plane was dirty the food was awful and the boarding process took too long

Everything. Employees offered to help me because I had to use a cane.

Check-in and boarding were great. On flight staff were rude and disrespectful. Paid for extra room and found it incredibly cramped. Bathrooms kept in poor condition. Overall negative experience.

The business class seating arrangement for LHR to MAA was very uncomfortable. The movie options were terrible.

Everything you need to know for your flight from London to Ko Samui

Other airlines flying from London to Ko Samui

Flights from the other most popular airlines that fly from London to Ko Samui according to KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.