LON - USM

£269 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 10/3. 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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest return fare
£759
Overall average: £860
Multiple Airlines
Sat 11/4Sat 16/5
LGW - USM • 1 stop
Cheapest one-way flight
£269
Multiple Airlines
Tue 10/3
STN - USM • 2 stops
Top airlines
Etihad Airways
Cheapest • from £759 (return)
EVA Air
Best reviews • 8.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
Not available
There are currently no direct flights between London and Ko Samui. You’ll need at least 1 connection.
Insights
Insights
Insights
Insights
Top stopover airports
Frankfurt am Main (FRA)
Cheapest • Avg £429 (return)
Vienna (VIE)
Shortest trip • 13h 20m (one-way)
Insights
Insights
Insights
Insights
Avoid delays
Virgin Atlantic
Most punctual • 96% on-time
Night flights
Best time • Fewest delays
Insights
Insights
Insights
Insights
When to book
4 weeks
in advance
Our data shows that travellers who book at least 4 weeks in advance save around 26% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
May
Cheapest • 14% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Ko Samui!
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

Sat, 11 Apr - Sat, 16 May
Multiple Airlines Logo
16:00 - 20:50
LGW
-
USM
22h 50m
1 stop
Multiple Airlines Logo
11:05 - 06:55
USM
-
LGW
25h 50m
2 stops
£759Multiple Airlines
Fri, 8 May - Mon, 22 Jun
Etihad Airways Logo
14:45 - 15:10
LHR
-
USM
18h 25m
2 stops
Etihad Airways Logo
21:00 - 12:45
USM
-
LHR
21h 45m
2 stops
£759Etihad Airways
Sun, 15 Mar - Thu, 19 Mar
Multiple Airlines Logo
17:00 - 21:20
LGW
-
USM
21h 20m
2 stops
Multiple Airlines Logo
07:55 - 06:30
USM
-
LGW
29h 35m
3 stops
£760Multiple Airlines
Sun, 19 Apr - Sun, 21 Jun
SWISS Logo
09:25 - 21:10
LGW
-
USM
29h 45m
2 stops
SWISS Logo
16:25 - 08:25
USM
-
LGW
22h 00m
2 stops
£763SWISS
Thu, 7 May - Sat, 23 May
Singapore Airlines Logo
10:15 - 18:50
LGW
-
USM
26h 35m
1 stop
Singapore Airlines Logo
18:15 - 06:55
USM
-
LGW
18h 40m
1 stop
£766Singapore Airlines
Wed, 27 May - Thu, 25 Jun
Qatar Airways Logo
09:00 - 10:30
LGW
-
USM
19h 30m
2 stops
Qatar Airways Logo
15:25 - 06:40
USM
-
LGW
21h 15m
2 stops
£769Qatar Airways
Wed, 27 May - Wed, 24 Jun
Qatar Airways Logo
09:00 - 10:30
LGW
-
USM
19h 30m
2 stops
Qatar Airways Logo
12:10 - 06:40
USM
-
LGW
24h 30m
2 stops
£769Qatar Airways
Tue, 2 Jun - Sun, 14 Jun
KLM Logo
17:10 - 18:15
LCY
-
USM
19h 05m
2 stops
KLM Logo
09:15 - 20:15
USM
-
LCY
17h 00m
2 stops
£772KLM
Fri, 15 May - Sun, 24 May
SWISS Logo
13:10 - 12:45
LCY
-
USM
17h 35m
2 stops
SWISS Logo
10:05 - 09:10
USM
-
LCY
29h 05m
2 stops
£783SWISS
Mon, 1 Jun - Sun, 14 Jun
KLM Logo
17:50 - 19:40
LCY
-
USM
19h 50m
2 stops
KLM Logo
09:15 - 20:15
USM
-
LCY
17h 00m
2 stops
£801KLM
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.

How much is a return flight from London to Ko Samui?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from London to Ko Samui departing in April.

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 £789 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is £1,300 and £1,041 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 26% 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£269
Best time to beat the crowds (12% less expensive on average)
Most popular time to fly and prices are also 2% lower on average.
Flight from London Stansted 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 £269 for a one-way ticket and £759 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 City.

  • 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 £835 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 £884 and an overall rating of 8.2.

  • 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 1361 reviews
8.6Crew
8.0Entertainment
8.3Comfort
8.4Boarding
8.1Food
Airline reviews

Very nice, I feel I got good value for the price.

10.0 ExcellentJimmy, Jan 2026
ORD - TPE
Read more EVA Air reviews

Very nice, I feel I got good value for the price.

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.

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.

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..

Sub sandwhich for a snack through mid flight and giving a bottle water was a good idea

I felt that the whole experience went very smoothly. The aircraft was extremely clean and tidy on boarding. The cabin crew were beautifully turned out very, very efficient and were a credit to Singapore Airlines who are now my favourite carrier.

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.

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).

Same as already mentioned. This was more comforting as I got my aisle seat for my knee.

excellent! movie selection just ok, but everything else was wonderful.

Qatar Airways is an excellent service provider. The crew members were attentive and helpful. The aircraft was very clean. This was the longest leg of our journey, so it would have been nice to have more leg room for comfort. We appreciated the crew's service of four hot meals to all of us during this long flight. Also, it was helpful that the crew asked us to keep the window shades down for the entire journey, allowing the environment to get lots of rest during the trip. For families traveling with little children, this was helpful to them to keep them settled.

The boarding experience did not follow the Zones that were listed on the boarding passes. This was a two-level aircraft with many passengers. Because zones were not called out by the airline staff, there was simply a mob trying to board and it was not a pleasant experience.

This flight was a very good trip for us. The crew were very friendly and helpful. They made arrangements for my husband to have assistance in boarding. We were not expecting a meal, so it was a pleasant surprise on this short flight to have a meal and beverage from a very courteous crew.

Flight departed punctually on time. Unfortunately it seems because the destination airport is a secondary airport the airline sees it fit to operate a plane with lower comfort and offerings. There was no inflight entertainment, wifi or let alone a screen to at least track flight status for remaining flight time.

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

The luggage problem I previously mentioned was actually this flight

The flight was delayed due to snow in Frankfurt. There wasn't much information from BA or the airport, but Kayak was great and kept me informed of the delay and gate changes.

Late takeoff, but on time landing. Lost bags, 3 days to find them, still in transit to my location. Power outlets broken, Wi-Fi not working, so much for working on the long flight.

Good. For a long flight. The comfort of the seat could be better. Also, the food was « normal » plane food. Not indian plane food unfortunately! Everything else was smooth and great.

The seats were comfortable. So many empty seats allowed for stretching out and sleeping. The onboard entertainment was pretty good. The cabin crew were so kind and kept the passengers well- hydrated, and well fed.

We had American Airlines on our return and it was confusing if we were going with Aa or BA I had 2 different flight numbers and didn’t get our gate until it was boarding. So we were a bit nervous as the which it was

No WiFi. No food. 250 ml of water only drink option. No entertainment options. Extremely bare bones flight

Economy seats were good and spacious. Much better than virgin by a mile.

It’s the old style plane with the old Ying Yang seats doesn’t compare to other airlines with newer planes.

I was unable to board this flight because of visa changes that I was not alerted about and I’ve been unable to contact Kayak to obtain a refund / credit anything.

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.