LHR - USM

£346 Find Cheap Flights from London Heathrow Airport 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 Heathrow to Ko Samui departing on 15/3. 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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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
£346
Typical prices: £510-£566
Multiple Airlines
Sun 15/3
LHR - USM • 2 stops
Our travellers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
Finnair's A350 offers a more comfortable long-haul journey.
BA's cabin crew are known for professionalism and service.
Expert advice
Expert advice
Expert advice
Expert advice
Video guide: How to find cheap flights to Ko Samui
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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 • 13% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
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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
Expert advice
Flight Deals

Cheap Flights from Heathrow to Ko Samui (LHR-USM)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Heathrow 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 Heathrow 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
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, 4 May - Fri, 15 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
£731British Airways
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
Mon, 16 Mar - Thu, 19 Mar
Multiple Airlines Logo
08:25 - 21:20
LHR
-
USM
29h 55m
2 stops
Multiple Airlines Logo
07:15 - 05:55
USM
-
LHR
29h 40m
2 stops
£734Multiple Airlines
Mon, 6 Apr - Thu, 7 May
Etihad Airways Logo
14:45 - 07:10
LHR
-
USM
34h 25m
2 stops
Etihad Airways Logo
20:35 - 15:05
USM
-
LHR
24h 30m
2 stops
£735Etihad Airways
Fri, 12 Jun - Fri, 26 Jun
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
£742British Airways
Sun, 26 Apr - Mon, 11 May
British Airways Logo
19:25 - 18:15
LHR
-
USM
16h 50m
1 stop
British Airways Logo
13:30 - 05:25
USM
-
LHR
21h 55m
2 stops
£744British Airways
Fri, 5 Jun - Sat, 20 Jun
Multiple Airlines Logo
14:50 - 17:45
LHR
-
USM
20h 55m
3 stops
Multiple Airlines Logo
13:30 - 08:40
USM
-
LHR
25h 10m
2 stops
£750Multiple Airlines
Sun, 12 Apr - Wed, 1 Jul
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
£753British Airways
Booking Insights

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

Get data-powered insights and trends into flights from Heathrow 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 Heathrow 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 Heathrow Airport to Ko Samui?

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

If you are looking for a flight deal from London Heathrow Airport to Ko Samui, look for departures on Wednesdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Ko Samui, Friday is the cheapest day to fly and Monday is the most expensive.

What is the cheapest month to fly from London Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport to Ko Samui is May, where tickets cost £782 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is £1,238 and £1,043 respectively.

How far in advance should I book a flight from London Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport 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.

Expert advice

Expert advice for your flight from Heathrow to Ko Samui

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Finnair

Finnair's A350 offers lower cabin altitude and higher humidity for a more comfortable long-haul journey.


Economy Comfort seats provide extra legroom for a small fee, enhancing comfort on long flights.

Iberia

Iberia's A350 offers Bluetooth headphone pairing for enhanced in-flight entertainment.


Iberia's premium economy provides wider seats and adjustable headrests for added comfort on long flights.

British Airways

BA's premium economy offers 18 cm extra legroom, ideal for long-haul comfort.


BA's cabin crew are known for professionalism and proactive service, enhancing the travel experience.

Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on Finnair

Gabriel Leigh

Gabriel Leigh

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Marisa Garcia

Marisa Garcia

Expert on Iberia

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialising in airline interiors and regulations. 10 years ago, she pivoted to journalism. She shares her insights in leading aviation, travel and business publications and on her site, FlightChic.

Read more
Duncan Madden

Duncan Madden

Expert on British Airways

Duncan Madden

Duncan Madden

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Read more

Good to know - Cheap tickets from London Heathrow Airport to Ko Samui

Low seasonNovember
Cheapest flight£346
Best time to beat the crowds (11% less expensive on average)
Most popular time to fly and prices are also 4% lower on average.
Flight from London Heathrow Airport to Ko Samui

When to book flights from Heathrow to Ko Samui

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

  • How do you get from downtown London to London Heathrow Airport?

    London Heathrow’s central bus station operates 24h, and it is a few minutes’ walk from Terminal 2 and 3. National Express and Megabus operate buses from various destinations in the city to the airport. Several car rental services, including Hertz, Europcar, SIXT, and Budget, have pickup points across London city. Piccadilly Line trains, rideshare cabs, the Heathrow Express train are alternative transfer options from downtown London to Heathrow.

  • Are there designated smoking areas at London Heathrow?

    There are no designated smoking zones past the security area. Passengers in transit aren’t permitted to smoke during the connection process. Smoking areas are located outside the terminal, so you will have to pass through security control before being allowed into the departure lounge.

  • Are there lounges at London Heathrow?

    There are numerous lounges at London Heathrow, including Plaza Premium Lounge in Terminal 2 and Club Aspire in Terminal 3. Terminal 4 users will have access to Sky Lounge, while Terminal 5 users can take advantage of Aspire Lounge & Spa.

  • Are there lounges at Koh Samui Airport?

    There are lounges for arriving passengers at Koh Samui Airport, irrespective of their airline. You can access a lounge through a membership program or purchase a lounge pass or pay at the door. Blue Ribbon Club Lounge is available at all terminals, and its services include restrooms, reading areas, magazines and newspapers, beverages, foods, and Thai massage.

  • Are there transportation options from Koh Samui Airport to the city centre?

    Taxis from the airport to the city centre are readily available in the ground transportation area. Ride-share and private minivans are a cheaper alternative transfer option to Chaweng Beach. A taxi ride to Chewang Beach from the airport takes around 9min, and it costs approximately ฿120 (£3).

  • Where do you fly through from London Heathrow to Samui Airport?

    Flights from London Heathrow to Samui Airport stops at least twice at Zurich and Bangkok before the plane touches down at Samui Airport. You may also fly to Samui Airport from Heathrow through Vienna and Bangkok, but your flight will be a little longer.

  • What is the cheapest flight from London Heathrow Airport to Ko Samui?

    In the last 3 days, the lowest price for a flight from London Heathrow Airport to Ko Samui was £346 for a one-way ticket and £726 for a return.

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

    On your way to Ko Samui, you’ll fly out from London Heathrow. You’ll be landing at Ko Samui.

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

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

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

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between London Heathrow Airport 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 Heathrow Airport?

    Bangkok is the most popular stopover city among KAYAK users travelling from London Heathrow Airport 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 £820 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 £970 and an overall rating of 8.1.

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

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London Heathrow Airport 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 Heathrow Airport is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London Heathrow Airport 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 Heathrow Airport with another airline.

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

  • Koh Samui Airport is the hub for Bangkok Airlines. Airlines that operate flights from London Heathrow to Kho Samui Airport include SWISS, Bangkok Airlines, Turkish Airlines, and Etihad Airways.
  • There are no baggage storage and lockers at Koh Samui Airport (USM), but there are free luggage trolleys to help you move with your bags from one terminal to another
  • There are several ways to keep yourself engaged as you await your flight from London Heathrow (LHR) to Koh Samui. Head to Terminal 5 and find an art gallery near Premium Check-in counters.
  • Heathrow Airport has observation areas at the Wondertree in Terminal 2 and the Traveller Lounge in Terminal 3. If you are in Terminal 5, head to Gates 15 and 16 and watch planes as they land and take off in the Southern Runway. The Gordon Ramsay Plane Food at Terminal 5 offers fantastic viewing points.
  • London Heathrow offers resting zones with recliner seats across all terminals. Terminal 3 Departures level has a resting zone with snack machines, lounges, and sofas.

Reviews of the top 5 airlines flying from Heathrow 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 Heathrow 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
8.4Boarding
8.6Crew
8.1Food
8.3Comfort
8.0Entertainment
Airline reviews

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

10.0 ExcellentWalter, Nov 2025
TPE - BKK
Read more EVA Air reviews

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

Eva airlines has very goin service, despite being low cost. Meals and fin, not amazing, restrooms always clean and staff polite and helpful

everything was so good! Especially Food. It was the best I've ever had! However,I requested to add mileage point to Star alliance group ANA; it hasn't been added yet.... 😞

The crews are very efficient. Other airlines should learn from them when it comes to boarding and departing from the airplane. They also display efficiency in serving meals. They don't keep the aisles blocked for hours like some other airlines. The food is poor. Generally the food was unrecognizable and poorly prepared. The only thing that made it better than US flag carriers is that there was a fresh fruit bowl with each meal.

The EVA air staff at Narita did a terrible job with signage and communication. Despite getting to the airport hours before, they had me queue in line and did not communicate that passengers for Kaohsiung need to step out of line to go to a different line. If you put the flight number at the front of the line, people will think that’s their line. If your staff walk silently down the line with a sign of the flight number, how are we supposed to know you want us to follow unless you speak or write that? I even asked the staff with this sign when we could check our bags and they assumed I was on the later flight to Taipei. Later, Wl only 30 minutes remaining I called for help, and the staff looked at me like I was in the wrong. I had to rush through security and customs and had no time to eat or buy a gift. I’m deeply disappointed in the way they handled it, and it caused unnecessary stress on my vacation.

Staff show very stress with delayed flight more than passenger.

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

The food from Los Angeles to Taipei made me throw up. The flight is also not comfort. But the staffs are very friendly and nice.

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.

seats are pitched well. you don't feel too tight.

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

toilets could be cleaned more frequently, everything else was pretty good.

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

SQ service is great as always. However, the food quality seems to have gotten a lot worse recently.

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.

I was in a middle seat where I felt a bit too cramped otherwise the trip was good

Airline should consider adding a small meal at the last leg of the flight, right now there is 7 hours of no meal break.

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).

Most of the crew members were rude, flight arrived late and we missed our connecting flight, they damaged my friends suitcase so badly that two wheels had been destroyed.

Loved the courtesy and punctuality. Very professional and most importantly on time.

Great! They got my vegetarian meal right, flight was comfortable, they helped store my heavy luggage. Pleasant crew and flight staff.

My layover in Vienna was supposed to be 35 minutes but because my flight was canceled I had to wait in the airport for an additional 8 hours.

Very limited legroom in a 10 hour flight.very old plane.

They had me unpack a handbag 2 lbs overweight into another handbag 8 lbs underweight for a Bible.

One thing I really liked about Austrian Airlines was that the flight attendants were very kind, and the in-flight entertainment offered many choices. One thing that could be improved is the meal service, since only a vegetarian option was offered — it would be better to have at least two choices

One thing I really liked about Austrian Airlines was that the flight attendants were very kind, and the in-flight entertainment offered many choices. One thing that could be improved is the meal service, since only a vegetarian option was offered — it would be better to have at least two choices.

Austrian Airlines help and service was fine, but Kayak misled us into believing we had purchased a Business Class ticket. In fact, the tickets were only upgraded Coach Class tickets with luggage restrictions that belonged to the Coach Class. Very disappointed! Paid over $$$$ 9K for the two tickets. Very disappointing!

Quick and organized boarding process, friendly staff but not as many snacks and drinks as the previous flight overnight

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 Heathrow to Ko Samui

Information on your arrival and departure airports