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LHR - USM

Find cheap flights from London Heathrow Airport to Koh Samui from £404

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 31/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Thu 23/5
Thu 30/5

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

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

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Cheap flight deals from 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
20:25 - 21:35LHR-USM
19h 10m2 stops
21:15 - 20:30USM-LHR
29h 15m2 stops
Mon, 3 Jun - Sun, 16 Jun
11:45 - 12:45LHR-USM
19h 00m2 stops
10:55 - 08:00USM-LHR
27h 05m2 stops
Mon, 27 May - Mon, 3 Jun
21:50 - 08:35LHR-USM
28h 45m2 stops
07:00 - 18:45USM-LHR
17h 45m2 stops
£706Etihad Airways
Find Deal
Thu, 5 Sep - Thu, 26 Sep
21:50 - 07:20LHR-USM
27h 30m2 stops
19:00 - 18:45USM-LHR
29h 45m2 stops
£707Etihad Airways
Find Deal
Sun, 29 Sep - Sun, 6 Oct
21:35 - 20:55LHR-USM
17h 20m1 stop
08:45 - 19:25USM-LHR
16h 40m1 stop
£797EVA Air
Find Deal
Wed, 22 May - Wed, 29 May
21:35 - 20:30LHR-USM
16h 55m1 stop
08:45 - 19:25USM-LHR
16h 40m1 stop
£802EVA Air
Find Deal
Mon, 24 Jun - Mon, 8 Jul
17:35 - 21:15LHR-USM
21h 40m2 stops
08:00 - 21:25USM-LHR
19h 25m2 stops
£818Air France
Find Deal
Mon, 10 Jun - Fri, 14 Jun
06:40 - 09:20LHR-USM
20h 40m2 stops
21:15 - 07:15USM-LHR
16h 00m1 stop
£1,008Thai Airways
Find Deal
Thu, 26 Sep - Sat, 12 Oct
06:40 - 08:35LHR-USM
19h 55m2 stops
08:00 - 19:10USM-LHR
17h 10m1 stop
£1,012Thai Airways
Find Deal
Wed, 15 May - Fri, 31 May
17:35 - 21:15LHR-USM
21h 40m2 stops
10:55 - 08:00USM-LHR
27h 05m2 stops
£1,021Air France
Find Deal
Mon, 13 May - Fri, 17 May

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 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 £865 on average. On the other hand, the most expensive months are December and July, where the average cost of tickets is £1,497 and £1,219 respectively.

How far in advance should I book a flight from London 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 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 79 days before departure.

Which airlines provide the cheapest flights from London 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 £706 on Etihad Airways, followed by Gulf Air (£772). One-way flight deals have also been found from as low as £528 on Gulf Air and from £530 on EVA Air.

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

Low season

July

High season

February

Cheapest flight

£404
Best time to beat the crowds but there is an average 24% increase in price.
Most popular time to fly and prices are also 11% 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 £499 for a one-way ticket and £817 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, oneworld, and SkyTeam 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 £918 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 £1,143 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

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 1557 reviews
7.9food
8.4boarding
8.6crew
8.0entertainment
8.2comfort
Airline reviews

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

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

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

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.

Delayed due to no fault of flight crew. Efficient and worked well together.

Flight crew was the best. First time on Eva airways and we will be a repeat customer. Service was efficient and food was very good. Empty seats allowed us to stretch and sleep.

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!

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.

Everything went smooth. All flights were on time No changing gates, . No changing flights . It was like a completely different airlines tha n the last time I used Cathay Pacific . The last flight, 2 months ago, I had before this one was from Philippines also . I got changed in Manila and was told it only added 2 hours onto my flight . My 20 hour return trip ended up being 30 hours return with a 10.0 hour layover in New York with no seats anywhere . Everyone was sleeping or sitting on the floor . Unlike the hotel I was given in Manila to wait for this flight home . I never thought I would use Cathay Pacific again . But I did and this time you were great! I should have complained about the flight and layover from Hell a couple months ago. Consider that I am complaining about that august/23 flight now . Thank you got the great flying experience on my way home from philippines .

Everything was good food could be better but ok for economy on my 2nd flight the head ph jack are bad you have to hold pushed in to hear anything but other then that very nice service

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.

Ripped off and broken seats in Business class. Seats stink and need to request the staff for additional bedsheets. Crew if very friendly though

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

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

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

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

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

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

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

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

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

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

Book cheap flights from London to Koh Samui

Cheapest flights to Koh Samui from London found in 2024

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from London to Koh Samui found on KAYAK in the last 72 hours.
31/5Fri
2 stops
27h 15mLHR-USM
£404
22/5Wed
3 stops
59h 35mLHR-USM
£406
22/5Wed
2 stops
36h 50mLHR-USM
£415
1/5Wed
3 stopsGulf Air
44h 45mLHR-USM
£528
30/4Tue
1 stopEVA Air
16h 55mLHR-USM
£530
1/5Wed
1 stopEVA Air
18h 00mLHR-USM
£538
30/4Tue
1 stopThai Airways
18h 10mLHR-USM
£593
19/8Mon
3 stopsGulf Air
42h 10mLHR-USM
£779
13/7Sat
1 stopSingapore Airlines
28h 00mLHR-USM
£792
25/7Thu
1 stopThai Airways
14h 20mLHR-USM
£797

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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.
26/4Fri
multi-stopEVA Air
16h 55mLHR-USM
16/5Thu
multi-stopEVA Air
17h 25mUSM-LHR
£820
26/4Fri
multi-stopEtihad Airways
29h 20mLHR-USM
16/5Thu
multi-stopEtihad Airways
23h 45mUSM-LHR
£879
26/4Fri
multi-stopGulf Air
40h 15mLHR-USM
16/5Thu
multi-stopGulf Air
28h 10mUSM-LHR
£927
26/4Fri
multi-stop
20h 05mLHR-USM
16/5Thu
multi-stop
16h 10mUSM-LHR
£977
26/4Fri
multi-stopGulf Air
40h 15mLHR-USM
16/5Thu
multi-stopGulf Air
39h 40mUSM-LHR
£979
24/4Wed
multi-stopAustrian Airlines
26h 40mLHR-USM
27/4Sat
multi-stopAustrian Airlines
25h 05mUSM-LHR
£1,700

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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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