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LHR - USM

£411 Find cheap flights from London Heathrow Airport to Koh 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 Koh Samui departing on 15/9. 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
Sat 29/6
Sat 6/7

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 42,686,544 times on KAYAK, and here's why:

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Cheap flight deals from Heathrow to Koh Samui (LHR-USM)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Heathrow 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
21:50 - 07:20LHR-USM
27h 30m2 stops
07:00 - 18:45USM-LHR
17h 45m2 stops
£675Etihad Airways
Find Deal
Tue, 10 Sep - Thu, 26 Sep
21:50 - 07:20LHR-USM
27h 30m2 stops
07:00 - 18:45USM-LHR
17h 45m2 stops
£677Etihad Airways
Find Deal
Mon, 9 Sep - Tue, 24 Sep
20:55 - 07:20LHR-USM
28h 25m2 stops
07:00 - 18:45USM-LHR
17h 45m2 stops
£678Etihad Airways
Find Deal
Mon, 9 Sep - Tue, 24 Sep
22:05 - 21:15LHR-USM
17h 10m1 stop
09:00 - 15:40USM-LHR
36h 40m1 stop
£769Singapore Airlines
Find Deal
Thu, 5 Sep - Thu, 19 Sep
10:55 - 08:05LHR-USM
38h 10m1 stop
09:00 - 15:20USM-LHR
37h 20m1 stop
£781Singapore Airlines
Find Deal
Fri, 1 Nov - Thu, 14 Nov
21:35 - 20:30LHR-USM
16h 55m1 stop
08:45 - 19:25USM-LHR
16h 40m1 stop
£801EVA Air
Find Deal
Sat, 31 Aug - Thu, 12 Sep
21:20 - 19:45LHR-USM
15h 25m1 stop
10:05 - 19:20USM-LHR
16h 15m1 stop
£803EVA Air
Find Deal
Sat, 23 Nov - Sun, 1 Dec
08:35 - 09:25LHR-USM
17h 50m2 stops
07:00 - 19:50USM-LHR
19h 50m2 stops
£880Qatar Airways
Find Deal
Fri, 8 Nov - Sat, 16 Nov
06:40 - 08:35LHR-USM
19h 55m2 stops
08:45 - 19:10USM-LHR
16h 25m1 stop
£967Thai Airways
Find Deal
Mon, 16 Sep - Sun, 29 Sep
21:25 - 17:45LHR-USM
14h 20m1 stop
21:10 - 07:15USM-LHR
16h 05m1 stop
£992Thai Airways
Find Deal
Mon, 24 Jun - Mon, 9 Sep

Flights from Heathrow to Koh Samui - Travel Insights & Trends

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

The average price of all flights from London Heathrow Airport to Koh Samui clicked on KAYAK for each day over the last 12 months.
For London Heathrow Airport to Koh Samui, Wednesday is the cheapest day to fly on average and Saturday is the most expensive. Flying from Koh Samui back to London Heathrow Airport, the best deals are generally found on Tuesday, with Thursday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from London Heathrow Airport 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 Heathrow Airport to Koh Samui is May, where tickets cost £827 on average. On the other hand, the most expensive months are December and July, where the average cost of tickets is £1,360 and £1,204 respectively.

How far in advance should I book a flight from London Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport to Koh Samui, you should book around 4 days before departure. For the absolute cheapest price, our data suggests you should book 13 days before departure.

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

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The cheapest return flight ticket from London Heathrow Airport to Koh Samui found by KAYAK users in the last 72 hours was for £675 on Etihad Airways, followed by Gulf Air (£742). One-way flight deals have also been found from as low as £501 on Etihad Airways and from £540 on EVA Air.

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

Low season

November

High season

March

Cheapest flight

£411
Best time to beat the crowds (7% less expensive on average)
Most popular time to fly and prices are also 3% lower on average.
Flight from London Heathrow Airport to Koh Samui

When to book flights from Heathrow to Koh Samui

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

    In the last 3 days, the lowest price for a flight from London Heathrow Airport to Koh Samui was £523 for a one-way ticket and £860 for a return.

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

    On your way to Koh 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 Koh Samui?

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

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

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

    Bangkok is the most popular stopover city among KAYAK users travelling from London Heathrow Airport 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 £878 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 £1,082 and an overall rating of 8.2.

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

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

See more FAQs

KAYAK’s top tips for finding a cheap flight from London Heathrow Airport to Koh 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.
See more tips

Top 5 airlines serving from Heathrow 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 Heathrow 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 1500 reviews
8.0Food
8.2Comfort
8.4Boarding
8.0Entertainment
8.6Crew
Airline reviews

The food was good, but we are not able to use earphones to watch a movie.

10.0 ExcellentYue, May 2024TPE - PEK
Read more about EVA Air reviews

The food was good, but we are not able to use earphones to watch a movie.

Flight was smooth no complaint. Except maybe better food choice for the long flight…

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.

Poor food on board, but seats are too small and uncomfortable

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

I hope their usb charging port works. None of their usb port is working. Boeing 777 LA to Taipei (vs)

The crew is so cold and indifferent but I have to appreciate their professionalism. The seat is too hard and not comfortable at all. Entertainment is very limited and not of many choices.

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.

I enjoyed the flight it was long but very friendly crew

The ride was comfy and crew members were nice. Really appreciate the option of the airport shuttle for passengers from near by states (NJ & PA) by EVA.

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!

The flight was cancelled. I wasn't informed where to check in, how and when. It wasn't easy to get in contact with Cathay service representative, and they were not very helpful... The staff on the airport - Air Canada (I assume) were the most helpful, kind efficient, patient... Thank you for all your help and care, for your patience, for your professionalism!!!

The flight crew was exceptionally good. Personal needs were well met. The food choices were very nice.

Crew experience was more transnational, seats were so close together (LtoR and FtoB) that it was difficult to enjoy much of anything. When the person in front leaned back, there is no space for me. Sadly it was a flight to be endured not experienced.

we were upgraded which was a blessing and tender mercy for us. I fell the day before and was in extreme pain from knee to shoulder. Sitting in a more comfortable seat during the flight was an unexpected blessing and experience.

My seat was sold off to someone else. Had to wait 9 hours to catch the next filght. Definitely will never use Cathay Pacific again. Bad, very bad airline. will comment on google reviews too.

Very poor check-in experience, and flight meal service was very disappointing with no drinks service or hot meal.

One of the worst flight in business class by qatar airways and I’m no stranger with qatar airways businesses class, I travelled with the extensively in the past 12 years

Very comfortable flights. Not so many new releases in terms of films.

The aircraft was slightly newer but the food was very bad. Bland and uninteresting. Nothing special at all.

The crew were fine. I didn’t enjoy the food at all. I found it unappetising and really had trouble eating it. The comfort level was fine and our return flight is with Cathay Pacific but honestly I probably wouldn’t fly Cathay Pacific again.

The business class experience is fantastic. The crew were polite but often unavailable even when I tried to call them! I even found myself bringing my used dishes and cutlery up to the crew because no one had come to collect it after over an hour.

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

In my opinion, Etihad Airways is a first rate airline except for one important element. On the day before my return flights, when I chose my seats on the Etihad website I was charged an additional $55 (US) in order to sit on the aisle. I was not at all happy about this additional "hidden" charge and I felt cheated.

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

I WOULD ADVISE NOT TO BOOK YOUR FLIGHT ON KAYAK. THEY SHOW BETTER FARES AND AFTER I BOOKED MINE, I FIND OUT THAT IT DID NOT INCLUDE LUGGAGE. i HAD TO PAY $800 TO CHECK IN MY BAGS.

Etihad broke my suitcase Also over charged me for luggage

Entertainment did not work from flight from Abu Dhabi to Kolkata. Emirates has a much better flight in that sector.

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.

My worst flying experience so far. This flight was delayed a total of 42 hours and diverted to New York before it was finally cancelled. It was delayed 4 and a half hours in London. As we were scanning our boarding passes at the gate they advised that the flight was being diverted to JFK since the delays caused us to missed the open hours for Charlotte international customs and immigration. We were assured multiple times by airport personnel, flight attendants, and the Pilot that we would land at JFK go through customs and immigration and then reboard the plane to fly to Charlotte in the same night. When we landed in New York the pilot advised us as we were retrieving our carry on luggage that we were delayed till 10am the next morning and to see guest services to get a room for the night. During this time I had to purchase a room for a family member in Charlotte which drove over 4 and a half hours to pick us up from Charlotte. This could have been avoided if American Airlines had been up front about the delay. Then after standing in line for over 2 and a half hours at guest services we were taken by taxi to a hotel 30 minutes out of the way. Luckily I looked for other flights that night and found one at 8 am to get on. The initial flight which we were scheduled to fly to charlotte in was delayed 12 more times and was finally cancelled 42 hours after it was supposed to land. I am unaware of what happened to the guest that were supposed to fly on the flight after we were placed on another flight but 42 hours in delays for a direct flight is absolutely ridiculous.

Really quick check in and security at Heathrow Terminal 5. Staff on board were lovely and very friendly. Could have provided a few more drinks on the flight but they were available at the back of the plane.

Flight boarded and took off late for unknown reasons. Crew insisted we check our hand luggage due to full flight, which it was not even close to full. Then had to wait almost an hour a and a half for the hand luggage to come onto the luggage belt since it was loaded last. This came after many hours of traveling pregnant with my 6 year old daughter. Really didn’t appreciate the unnecessary delays. What the hell?

Left late. Crowded like cattle. Standing and waiting. Food on board getting worse.

Terrible- the flight time was delayed and then I was denied boarding because I arrived at the new time of departure

Flight delayed an hour due to plane maintenance issues after getting in line to board. Issue was plane galley ovens which eliminated hot meals for overseas flight. Cold selections were limited due to availability. Drink and meal service (already an hour delayed) was very slow. Upon arrival in Nashville, had to sit at gate for about 15 minutes before disembarking with no explanation. Local police then boarded plane as we were disembarking so maybe that was the issue.

Boarding good. Seats uncomfortable when lie flat. Food was awful. Tasted stale and chicken was dry. No live tv or flight map. Had to pay for internet.

Poor technical details on this plane. 1) There was no WiFi on an 8 hour long-haul flight. So no work could be done. That's below the standard expected for airlines these days. 2) The power outlet at my seat was busted and not working. 3) The headphone jack was loose and I had to keep adjusting my headphones to get good reception, or when it slipped out. - The flight was delayed to due mechanics. Sometimes this can't be avoided, I understand, and it's a big inconvenience to arrive that much later when traveling across time zones (then arriving at 4am from the prior time zone). - Also unique to this flight, the northern lights were visible on the right side of the aircraft, but I only found out after we landed (b/c again no wifi). I understand there are considerations about people being out of their seats to look, but I feel extremely disappointed and resentful that I wasn't told so that I could have a chance to look at this probably once-in-a-lifetime cosmic event from a view in the sky. - Flight crew was otherwise friendly and helpful.

Our flight was delayed by over 6 hours. We then had to deplane, stay overnight in a hotel then fly out the next day, 23 hours late.

I would have preferred something lighter for the second meal. Maybe a small sandwich .

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.
15/9Sun
3 stops
28h 55mLHR-USM
£411
30/8Fri
2 stops
27h 30mLHR-USM
£443
15/9Sun
2 stops
27h 30mLHR-USM
£447
30/8Fri
2 stopsEtihad Airways
27h 30mLHR-USM
£501
30/8Fri
1 stopEVA Air
17h 20mLHR-USM
£540
30/8Fri
1 stopEVA Air
14h 55mLHR-USM
£542
30/8Fri
3 stopsGulf Air
39h 20mLHR-USM
£736
2/9Mon
3 stopsGulf Air
45h 45mLHR-USM
£757
24/6Mon
1 stopThai Airways
15h 40mLHR-USM
£1,578
2/7Tue
1 stopThai Airways
14h 05mLHR-USM
£2,207

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Last minute flights from Heathrow 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.
3/6Mon
multi-stopEtihad Airways
28h 25mLHR-USM
16/6Sun
multi-stopEtihad Airways
28h 45mUSM-LHR
£697
3/6Mon
multi-stopEVA Air
17h 20mLHR-USM
16/6Sun
multi-stopEVA Air
27h 55mUSM-LHR
£816
3/6Mon
multi-stop
27h 30mLHR-USM
16/6Sun
multi-stop
27h 55mUSM-LHR
£909
3/6Mon
multi-stopGulf Air
40h 15mLHR-USM
16/6Sun
multi-stopGulf Air
28h 10mUSM-LHR
£974

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London Heathrow Airport - Koh Samui Flights

Departure:

London Heathrow Airport (LHR)United Kingdom

Destination:

Koh Samui (USM)Thailand

Return flight deals:

Koh Samui - London Heathrow Airport

Cabin classes:

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