LHR - USM

$563 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 11/15. 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

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, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Ko Samui, as well as popular online travel agencies
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Flights Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip 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 round-trip flight deals from London to Ko Samui

Mon, Nov 17 - Mon, Nov 24
SWISS Logo
6:40 pm - 9:05 pmLHR-USM
19h 25m2 stops
SWISS Logo
10:00 am - 9:40 pmUSM-LHR
18h 40m2 stops
$830SWISS
Find Deal
Mon, Nov 17 - Mon, Nov 24
SWISS Logo
6:40 pm - 9:05 pmLHR-USM
19h 25m2 stops
SWISS Logo
9:20 am - 9:40 pmUSM-LHR
19h 20m2 stops
$834SWISS
Find Deal
Thu, Sep 11 - Tue, Sep 23
 Logo
5:50 pm - 5:45 pmLHR-USM
17h 55m2 stops
 Logo
8:45 am - 9:45 pmUSM-LHR
19h 00m2 stops
Tue, Oct 28 - Wed, Nov 26
 Logo
5:50 pm - 8:00 amLHR-USM
31h 10m2 stops
 Logo
9:20 am - 9:40 pmUSM-LHR
19h 20m2 stops
Thu, Sep 11 - Tue, Sep 23
 Logo
5:50 pm - 5:05 pmLHR-USM
17h 15m2 stops
 Logo
9:15 am - 9:45 pmUSM-LHR
18h 30m2 stops
Thu, Sep 11 - Tue, Sep 23
 Logo
5:50 pm - 5:45 pmLHR-USM
17h 55m2 stops
 Logo
9:15 am - 9:45 pmUSM-LHR
18h 30m2 stops
Sun, Jan 25 - Sun, Feb 8
Lufthansa Logo
1:50 pm - 7:50 pmLHR-USM
23h 00m2 stops
Lufthansa Logo
1:25 pm - 9:45 amUSM-LHR
27h 20m2 stops
$841Lufthansa
Find Deal
Tue, Oct 28 - Wed, Nov 26
Lufthansa Logo
1:50 pm - 9:05 pmLHR-USM
24h 15m2 stops
Lufthansa Logo
4:25 pm - 8:45 amUSM-LHR
23h 20m2 stops
$856Lufthansa
Find Deal
Fri, Aug 29 - Thu, Sep 11
EVA Air Logo
9:35 pm - 8:50 pmLHR-USM
17h 15m1 stop
EVA Air Logo
8:45 am - 7:20 pmUSM-LHR
16h 35m1 stop
$1,119EVA Air
Find Deal
Thu, Jan 22 - Mon, Feb 16
Thai Airways Logo
9:35 pm - 8:25 pmLHR-USM
15h 50m1 stop
Thai Airways Logo
8:30 am - 7:35 pmUSM-LHR
18h 05m1 stop
$1,125Thai Airways
Find Deal
Expert advice

Expert advice for your flight from London to Ko Samui

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
American Airlines

Consider Main Cabin Extra for early boarding and complimentary drinks on long-haul flights.


American Airlines offers Premium Economy with upgraded seats and amenity kits for long-haul flights.

JetBlue

JetBlue's Mint cabin offers lie-flat seats and priority boarding on transatlantic flights.


Enjoy free gate-to-gate Wi-Fi and live TV on JetBlue flights.

Read more about JetBlueby Harriet Baskas
Delta

Delta's Delta One Suites offer privacy with sliding doors on select aircraft.


Delta offers free Wi-Fi for SkyMiles members on most flights.

Read more about Deltaby Stefanie Waldek
Iberia

Iberia's Business Class offers all-aisle access and Wi-Fi on long-haul flights.


Preview in-flight dining online for Iberia's Premium Economy long-haul flights.

Read more about Iberiaby Marisa Garcia
Virgin Atlantic

Virgin Atlantic's Upper Class offers fully flat beds and exclusive lounges.


Access Upper Class Wing at Heathrow for private check-in and security.

British Airways

BA's premium economy offers more legroom and priority boarding on long-haul flights.


Check for modern aircraft on BA long-haul flights for better comfort.

Our travel experts
Harriet Baskas

Harriet Baskas

Expert on American Airlines and JetBlue

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on Delta

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

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, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Laura Ratliff

Laura Ratliff

Expert on Virgin Atlantic

Laura Ratliff

Laura Ratliff

Laura Ratliff is a New York-based writer and editor. She lives in downtown Brooklyn with her husband and their beloved dogs. Originally from Texas, she now considers New York City her home. She typically spends more than 200,000 miles on a plane each year and stays in plenty of hotels.

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
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.

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 Heathrow Airport 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 Friday and more expensive on a Tuesday. On your return trip to London, you should consider flying back on a Wednesday, and avoid Thursdays for better deals.

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 September, where tickets cost $1,057 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $1,675 and $1,533 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 14% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Good to know

Low seasonJuly
Cheapest flight$563
Best time to beat the crowds but there is an average 25% increase in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from London 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 round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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 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 $563 for a one-way ticket and $830 for a round-trip.

  • Do I need a passport to fly between London and Ko Samui?

    Yes

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from London to Ko Samui are EVA Air and Thai Airways. With an average price for the route of $1,157 and an overall rating of 8.4, EVA Air is the most popular choice. Thai Airways is also a great choice for the route, with an average price of $1,347 and an overall rating of 7.8.

  • 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 round-trip ticket. You could then fly to Ko Samui with an airline and back to London with another airline. Booking your flights between London and USM can sometimes prove cheaper using this method.

  • 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 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 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 1222 reviews
8.0Entertainment
8.3Comfort
8.6Crew
8.4Boarding
8.1Food
Airline reviews

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

8.0 ExcellentKaye, Jul 2025JFK - TPE
Read more EVA Air reviews

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

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.

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) was kept clean and replenished

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.

I appreciate the email reminders for online check-in which made my entry to the lines less stressful. The flight was on schedule and on time. The baording staff were proactively helpful and approachable. The airplane inflight food, entertainment and comfies as well as provisions are excellent even in the economy seating. The airline transfer was smooth and easy! Luggage safe and intact! Thank you EVA airline for making my trip a reliable safe and comfortable experience.

Very smooth flight. Superb crew, great food and service. Slept most of the way. Excellent airline.

Excellent food. Good service. Crammed Premium Economy seats. I Asked to change seats during check in. They told me the flight was fully booked. But on board I saw empty seats where I could have been easily relocated.

Good. Please add a non- applicable category to your questions.

The app was awful. No accurate info. Paying for internet is a negative (Delta is free). The crew was very nice for the most part although you are not guaranteed to get good service. Some crew would ignore requests for things as simple as a cup of water if you were sleeping when the first serving was made. Food was great. Male crew member was exceptionally kind and responsive.

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).

Although booked meal of fruit only The crew had not received this special meal The same happened on my flight Bangkok / CAN The films are so old that best is to use own computer to watch downloads . Serve nuts but they do not warm up . Service is attentive , WC clean

Terrible. It’s like they are stuck in the dark ages. I brought a standard carry on suitcase and a back pack - I was told I could only carry on 7kg per bag - in business class, I was forced to remove articles from the suitcase and put them into my backpack! That’s the most ridiculous thing I’ve ever encountered in all my years of flying. The two bags weighed the same amount but one could not be more than 7kg. Holy cow.

They used Thai Smile plane, which is a smaller model and used to service only domestic flights; hence, the plane is small and quite compact. No entertainment on the flight. While boarding was delayed, it was done in a quick manner.

I give EVA 5 stars in every category. I enjoy this airline and it's great team of employees. I always highly recommend EVA to friends and family and everyone.

The flight was delayed going out of the gate at BKK that made it a difficult challenge to get through immigration transfer at tapei and make it to my departure on time. This appears to be a recurring issue. The flight crew and cabin crew were excellent. The food was very nice.

The boarding efficiency was good. A couple of the flight attendants did not seem in the best of moods. Overall it was a good experience.

The setting configuration of the aircraft stinks. Nobody should pay business class fares and be so uncomfortable. The design of facing fellow passengers is a brilliant nincompoop.

Entertainment is limited with a relatively old catalogue. Wi-Fi never works and the cabin and lavatory had evidence of a lot of scuff marks and temporary repairs. Nothing unsafe, but a bit tatty in places.

Delayed flight in Singapore caused the transfer at Bangkok to be very stressful. Fortunately, no elderly were in this trip, else it will not be possible to catch the connecting flight. There were also several occasions throughout the flight journey where some of the passengers were not wearing their seat belts despite several remainders from the stewardess.

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

Information on your arrival and departure airports

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