Cheap flights from London Heathrow Airport to Ko Samui from £391
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — USM
4 Mar — 11 Mar1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Ko Samui are usually found in May or November, booked 2 days in advance, depart on a Wednesday or Monday and return on a Friday
Cheap flight deals from Heathrow to Ko Samui
Enter your travel dates to find the best prices.
Cheapest
Best
Last-minute
One-way
Cheapest flights from Heathrow to Ko Samui
Explore the most affordable flight options available from Heathrow to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 February 2026.
Fri 20/1108:45
LHR
-
USM
2 stops29h 20m
Lufthansa
Fri 4/1220:20
USM
-
LHR
2 stops32h 20m
Lufthansa
Deal found 1/2£717
Tue 10/1115:50
LHR
-
USM
3 stops20h 05m
Multiple Airlines
Tue 24/1109:20
USM
-
LHR
2 stops30h 00m
Multiple Airlines
Deal found 31/1£718
Fri 1/514:45
LHR
-
USM
2 stops35h 40m
Multiple Airlines
Fri 15/519:10
USM
-
LHR
2 stops25h 55m
Multiple Airlines
Deal found 2/2£719
Tue 15/909:30
LHR
-
USM
2 stops20h 25m
Etihad Airways
Thu 1/1019:10
USM
-
LHR
2 stops25h 55m
Etihad Airways
Deal found 1/2£721
Sat 13/609:30
LHR
-
USM
2 stops19h 00m
Multiple Airlines
Fri 26/606:00
USM
-
LHR
2 stops18h 45m
Multiple Airlines
Deal found 1/2£723
Fri 1/521:45
LHR
-
USM
2 stops27h 25m
Etihad Airways
Fri 15/519:10
USM
-
LHR
2 stops23h 35m
Etihad Airways
Deal found 1/2£726
Tue 12/521:45
LHR
-
USM
2 stops32h 10m
Etihad Airways
Thu 21/520:50
USM
-
LHR
2 stops24h 15m
Etihad Airways
Deal found 31/1£727
Wed 17/606:00
LHR
-
USM
2 stops32h 30m
Multiple Airlines
Wed 1/707:50
USM
-
LHR
2 stops30h 05m
Multiple Airlines
Deal found 1/2£727
Wed 11/320:55
LHR
-
USM
2 stops27h 50m
Etihad Airways
Sat 25/418:55
USM
-
LHR
2 stops23h 50m
Etihad Airways
Deal found 31/1£728
Sun 22/220:55
LHR
-
USM
2 stops27h 35m
Etihad Airways
Sun 15/319:00
USM
-
LHR
2 stops26h 30m
Etihad Airways
Deal found 31/1£729
Fri 1/520:35
LHR
-
USM
1 stop16h 15m
Singapore Airlines
Sun 7/608:40
USM
-
LHR
1 stop16h 50m
Singapore Airlines
Deal found 1/2£734
Wed 4/321:00
LHR
-
USM
2 stops28h 25m
Multiple Airlines
Wed 11/319:00
USM
-
LHR
2 stops29h 30m
Multiple Airlines
Deal found 2/2£736
Best flights from Heathrow to Ko Samui
Discover carefully curated flight deals from Heathrow to Ko Samui that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 2 February 2026.
Fri 1/514:45
LHR
-
USM
2 stops35h 40m
Multiple Airlines
Fri 15/519:10
USM
-
LHR
2 stops25h 55m
Multiple Airlines
Deal found 2/2£719
Sun 17/509:30
LHR
-
USM
2 stops19h 00m
Etihad Airways
Mon 25/519:10
USM
-
LHR
2 stops23h 35m
Etihad Airways
Deal found 31/1£727
Fri 15/509:25
LHR
-
USM
1 stop16h 20m
Singapore Airlines
Tue 26/508:40
USM
-
LHR
1 stop16h 50m
Singapore Airlines
Deal found 1/2£746
Fri 1/520:35
LHR
-
USM
1 stop16h 15m
Singapore Airlines
Wed 13/508:40
USM
-
LHR
1 stop16h 50m
Singapore Airlines
Deal found 1/2£746
Wed 20/509:30
LHR
-
USM
2 stops22h 25m
Etihad Airways
Thu 28/519:10
USM
-
LHR
2 stops25h 55m
Etihad Airways
Deal found 31/1£775
Mon 18/509:30
LHR
-
USM
2 stops19h 00m
Etihad Airways
Thu 28/519:10
USM
-
LHR
2 stops25h 55m
Etihad Airways
Deal found 31/1£775
Fri 1/520:35
LHR
-
USM
1 stop16h 15m
Singapore Airlines
Fri 15/508:40
USM
-
LHR
1 stop16h 50m
Singapore Airlines
Deal found 1/2£776
Tue 5/509:25
LHR
-
USM
1 stop16h 20m
Singapore Airlines
Sat 16/508:40
USM
-
LHR
1 stop16h 50m
Singapore Airlines
Deal found 1/2£776
Mon 4/520:35
LHR
-
USM
1 stop16h 15m
Singapore Airlines
Fri 15/508:40
USM
-
LHR
1 stop16h 50m
Singapore Airlines
Deal found 1/2£776
Last-minute flights from Heathrow to Ko Samui
Discover last-minute flight deals from Heathrow to Ko Samui. Data last updated 2 February 2026 and is based on user searches.
Fri 20/208:25
LHR
-
USM
2 stops25h 35m
Multiple Airlines
Fri 6/321:40
USM
-
LHR
2 stops51h 45m
Multiple Airlines
Deal found 1/2£833
Fri 20/210:00
LHR
-
USM
2 stops24h 00m
Multiple Airlines
Sun 8/316:30
USM
-
LHR
2 stops29h 55m
Multiple Airlines
Deal found 31/1£852
Sun 22/220:55
LHR
-
USM
2 stops27h 35m
Etihad Airways
Sun 15/319:00
USM
-
LHR
2 stops26h 30m
Etihad Airways
Deal found 31/1£729
Mon 23/221:20
LHR
-
USM
1 stop17h 00m
EVA Air
Thu 12/308:45
USM
-
LHR
1 stop17h 20m
EVA Air
Deal found 1/2£853
Mon 23/213:50
LHR
-
USM
2 stops35h 35m
Multiple Airlines
Thu 12/313:25
USM
-
LHR
2 stops23h 50m
Multiple Airlines
Deal found 1/2£860
Wed 25/213:55
LHR
-
USM
2 stops24h 25m
Etihad Airways
Sun 15/319:00
USM
-
LHR
2 stops24h 05m
Etihad Airways
Deal found 1/2£770
Thu 26/209:30
LHR
-
USM
2 stops20h 05m
Multiple Airlines
Sat 7/308:15
USM
-
LHR
2 stops29h 20m
Multiple Airlines
Deal found 1/2£740
Thu 26/209:30
LHR
-
USM
2 stops20h 15m
Multiple Airlines
Thu 12/313:25
USM
-
LHR
2 stops32h 20m
Multiple Airlines
Deal found 1/2£740
Thu 26/219:20
LHR
-
USM
2 stops19h 00m
Etihad Airways
Sun 15/319:00
USM
-
LHR
2 stops24h 05m
Etihad Airways
Deal found 1/2£777
Fri 27/216:05
LHR
-
USM
2 stops22h 15m
Multiple Airlines
Sat 7/319:35
USM
-
LHR
2 stops26h 10m
Multiple Airlines
Deal found 1/2£851
Sat 28/211:00
LHR
-
USM
2 stops21h 40m
Multiple Airlines
Thu 12/316:30
USM
-
LHR
2 stops29h 30m
Multiple Airlines
Deal found 1/2£829
One-way flights from Heathrow to Ko Samui
Search for one-way flight options from Heathrow to Ko Samui. Find affordable one-way fares based on user searches. Data last updated 2 February 2026.
Sun 5/417:30
LHR
-
USM
2 stops41h 25m
Multiple Airlines
Deal found 1/2£391
Tue 10/319:50
LHR
-
USM
2 stops39h 00m
Multiple Airlines
Deal found 1/2£403
Fri 27/215:10
LHR
-
USM
3 stops34h 15m
Multiple Airlines
Deal found 1/2£453
Tue 10/208:45
LHR
-
USM
3 stops27h 05m
Multiple Airlines
Deal found 1/2£460
Mon 11/522:10
LHR
-
USM
2 stops28h 25m
Multiple Airlines
Deal found 31/1£472
Sun 15/214:15
LHR
-
USM
3 stops24h 05m
Multiple Airlines
Deal found 1/2£535
Find flight deals from Heathrow to Ko Samui
Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Ko Samui (USM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 2 February 2026.
Customise your flight search to find flights from Heathrow to Ko Samui that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 2 February 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Ko Samui that are best for you.
Fly from
Heathrow
Fly to
Ko Samui
Route
Depart
Return
Price
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Fri 1/5
14:45-08:25
2 stops35h 40m
Ko Samui
Fri 15/5
19:10-15:05
2 stops25h 55m
£719
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Sun 17/5
09:30-10:30
2 stops19h 00m
Ko Samui
Mon 25/5
19:10-12:45
2 stops23h 35m
£727
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Fri 15/5
09:25-07:45
1 stop16h 20m
Ko Samui
Tue 26/5
08:40-19:30
1 stop16h 50m
£746
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Fri 1/5
20:35-18:50
1 stop16h 15m
Ko Samui
Wed 13/5
08:40-19:30
1 stop16h 50m
£746
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Wed 20/5
09:30-13:55
2 stops22h 25m
Ko Samui
Thu 28/5
19:10-15:05
2 stops25h 55m
£775
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Mon 18/5
09:30-10:30
2 stops19h 00m
Ko Samui
Thu 28/5
19:10-15:05
2 stops25h 55m
£775
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Fri 1/5
20:35-18:50
1 stop16h 15m
Ko Samui
Fri 15/5
08:40-19:30
1 stop16h 50m
£776
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Tue 5/5
09:25-07:45
1 stop16h 20m
Ko Samui
Sat 16/5
08:40-19:30
1 stop16h 50m
£776
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Mon 4/5
20:35-18:50
1 stop16h 15m
Ko Samui
Fri 15/5
08:40-19:30
1 stop16h 50m
£776
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Sun 5/4
17:30-16:55
2 stops41h 25m
£391
Flights are sorted by cheapest return flights first.
Deals found on 1/2
Showing 1-10 of 17 results
1
2
Best time to book a flight from Heathrow to Ko Samui
Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Heathrow with our price prediction graph.
LHR-USM
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from London Heathrow Airport to Ko Samui
Prices
Delays
More
How far ahead should I book a flight from London Heathrow Airport to Ko Samui?
Use this chart to determine the optimal time to book a return flight from Heathrow to Ko Samui. Price data was last updated on 30 January 2026.
The best time to book flights from London Heathrow Airport to Ko Samui is 2 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from London Heathrow Airport to Ko Samui?
Currently, October is the cheapest month in which you can book a flight from London Heathrow Airport to Ko Samui (average of £481). Flying from London Heathrow Airport to Ko Samui in December is currently the most expensive (average of £754). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from LHR to USM?
Find hourly flight availability from Heathrow to Ko Samui. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 2 February 2026.
A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Ko Samui at midday. If you’re flexible enough to do this you can expect to save up to 37% on your trip compared to booking a flight in the morning.
What is the cheapest day to fly from London Heathrow Airport to Ko Samui?
Use this chart to determine the cheapest time to fly return from Heathrow to Ko Samui. Price data was last updated on 30 March 2025.
Travellers seeking maximum savings on their London Heathrow Airport to Ko Samui flight should consider departing on Wednesday at midday when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
How often are flights from London to Ko Samui delayed?
About 9% of weekly flights between London and Ko Samui have experienced delays in the past year, with the average delay time being 154 minutes.
What is the most punctual flight time for London to Ko Samui flights?
Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Saturday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on London to Ko Samui flights?
Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 4% of flights being delayed.
What’s the top stopover airport for flights from London Heathrow Airport to Ko Samui?
Share of one-stop return flights from London Heathrow Airport to Ko Samui chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Bangkok (BKK) – chosen by Cheapflights users on 84% of one-stop itineraries from London Heathrow Airport to Ko Samui on Cheapflights.
What’s the cheapest stopover airport for flights from London Heathrow Airport to Ko Samui?
Average return fare for one-stop flights from London Heathrow Airport to Ko Samui, chosen by Cheapflights users in the past 12 months, with the same stopover each way.
Muscat (MCT) is the most affordable one-stop option, with an average return flight price of £518.
What’s the fastest stopover option from London Heathrow Airport to Ko Samui?
Shortest average travel time for one-stop one-way flights from London Heathrow Airport to Ko Samui, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via Vienna (VIE) have the shortest average one-way travel time for one-stop routes: 13h 13m.
Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Ko Samui?
Average stopover duration for one-stop one-way flights from London Heathrow Airport to Ko Samui, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Vienna (VIE) offer the fastest connection on this route, with an average stopover time of 0h 48m.
Reviews of airlines servicing Ko Samui
Get insights into the airlines that provide service to Ko Samui. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ko Samui. Reviews last updated 2 February 2026.
Read through reviews of airlines operating flights from London Heathrow Airport to Ko Samui, such as EVA Air, Singapore Airlines, andThai Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Everything was good. I asked for aisle seating as I must stretch my leg out because of back and pelvis issues. Sometimes I don't always get it. But I did for all 3 of my flights for my destination. It was very nice.
Everything was good. I asked for aisle seating as I must stretch my leg out because of back and pelvis issues. Sometimes I don't always get it. But I did for all 3 of my flights for my destination. It was very nice.
Everything was good. I asked for aisle seating as I must stretch my leg out because of back and pelvis issues. Sometimes I don't always get it. But I did for all 3 of my flights for my destination. It was very nice.
Everything was good. I asked for aisle seating as I must stretch my leg out because of back and pelvis issues. Sometimes I don't always get it. But I did for all 3 of my flights for my destination. It was very nice.
Everything was good. I asked for aisle seating as I must stretch my leg out because of back and pelvis issues. Sometimes I don't always get it. But I did for all 3 of my flights for my destination. It was very nice.
Everything was good. I asked for aisle seating as I must stretch my leg out because of back and pelvis issues. Sometimes I don't always get it. But I did for all 3 of my flights for my destination. It was very nice.
Related info for your journey
Find useful and relevant information for your journey from Heathrow to Ko Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
What airport do you fly into for flights to Ko Samui from London Heathrow?
Most people fly into Ko Samui (USM) if they book a flight to Ko Samui from London Heathrow. On average, Ko Samui has 0 inbound flights from London Heathrow per day from 13 airlines. Ko Samui is conveniently located just 2.1 mi from Ko Samui’s city center.
How long is the flight from London Heathrow Airport to Ko Samui?
There are many flights that can get you from London Heathrow Airport to Ko Samui in 16h 20m. Fly via Etihad Airways or Singapore Airlines to get the fastest option. London Heathrow Airport and Ko Samui are separated by a distance of 6144 mi. This flight may include one or multiple stops.
What are the cheapest airlines flying from London Heathrow Airport to Ko Samui round-trip?
Currently priced at £111, Bangkok Airways will fly you from London Heathrow Airport to Ko Samui and back. In addition to Bangkok Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Air India and Etihad Airways - these airlines can fly you to your destination from £425 and £430, respectively. Bangkok Airways is currently priced 87% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from London Heathrow Airport to Ko Samui one-way?
The cheapest airline one-way is EVA Air, with whom users have recently found tickets for as low as £485. However, be on the lookout for offers from Thai Airways and Singapore Airlines, as they are both options that can get you from London Heathrow Airport to Ko Samui for a low price.
Where are the most common stopover locations when flying from London Heathrow Airport to Ko Samui?
The most popular stopover on flights from London Heathrow Airport to Ko Samui is Bangkok.
What are some popular things to do or see while on a stopover in Bangkok?
Bangkok travellers tend to visit Pratunam, Siam Square, and Thailand Cultural Center more than anywhere else. Travelers on a layover in Bangkok can visit Pratunam, Siam Square, and Thailand Cultural Center, by traveling 14.8 mi, 15.1 mi, and 13.1 mi, respectively after landing at Bangkok Suvarnabhumi. Those looking to explore during their stopover in Bangkok can hire a car from Bangkok Suvarnabhumi for about £20 per day.
Where are the least popular stopover locations for London Heathrow Airport to Ko Samui flights?
London Heathrow Airport to Ko Samui flights that have stopovers will least frequently stop in Singapore.
Can I find deals for flights from Heathrow to Ko Samui that include hotel bookings?
Yes. In addition to deals on Heathrow to Ko Samui flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Ko Samui?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Ko Samui.
Can I find deals for business class flights from Heathrow to Ko Samui?
Yes. Cheapflights offers flight deals from Heathrow to Ko Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London Heathrow Airport to Ko Samui?
Currently, October is the cheapest month in which you can book a flight from London Heathrow Airport to Ko Samui (average of £481). Flying from London Heathrow Airport to Ko Samui in December is currently the most expensive (average of £754). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Explore flights to Ko Samui departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 2 February 2026.
Browse through other flights departing from Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 2 February 2026.
Discover the top 10 airlines that operate flights from Heathrow to Ko Samui. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 2 February 2026.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Heathrow to Ko Samui?
Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Ko Samui. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.
Why should you use Cheapflights to find cheap flight tickets from Heathrow to Ko Samui?
Cheapflights simply makes it quick and affordable to book flights from Heathrow to Ko Samui by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.
Can Cheapflights find flights from Heathrow to Ko Samui with no change fees?
Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Ko Samui, users can toggle the no change fees filter when performing a flight search.
Can Cheapflights notify me if prices for flights from Heathrow to Ko Samui become cheaper?
Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Ko Samui from Heathrow today and book when prices fit your budget.
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
We value your privacy
Cheapflights and its partners wish to use cookies or similar technologies to store and/or access information on and about your device and process personal data such as your IP address, device identifiers etc., in order to improve your experience on the site, to analyse navigation, to offer and measure personalised advertising, and to facilitate sharing on social networks. We also allow the use of third-party cookies (including those from our advertising partners) on our sites.
By clicking 'Accept', you consent to your data being processed by 0 vendors on this web site for the purposes described in this notice. You can review the vendors and their individual processing purposes on the .
To review individual processing purposes and cookie categories, please click ’Select individual purposes’. You can review your choices and withdraw your consent at any time by clicking the ’Privacy Preferences’ link in the page side navigation.