Cheap flights from London Heathrow Airport to Ko Samui from £334
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 18/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — USM
1 May — 8 May1
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 June or May, 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.
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Best
Last-minute
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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 1 April 2026.
Sat 4/421:10
LHR
-
USM
2 stops41h 15m
Multiple Airlines
Fri 24/417:55
USM
-
LHR
2 stops25h 35m
Multiple Airlines
Deal found 29/3£778
Sat 3/1014:45
LHR
-
USM
2 stops24h 05m
Multiple Airlines
Sun 18/1021:00
USM
-
LHR
2 stops21h 45m
Multiple Airlines
Deal found 28/3£779
Sat 4/409:15
LHR
-
USM
2 stops29h 10m
Multiple Airlines
Sat 11/415:25
USM
-
LHR
2 stops29h 40m
Multiple Airlines
Deal found 28/3£782
Thu 16/421:10
LHR
-
USM
2 stops18h 25m
Etihad Airways
Thu 30/406:00
USM
-
LHR
2 stops19h 20m
Etihad Airways
Deal found 31/3£782
Sun 26/421:10
LHR
-
USM
2 stops18h 25m
Etihad Airways
Tue 12/517:50
USM
-
LHR
2 stops24h 55m
Etihad Airways
Deal found 29/3£783
Mon 27/421:10
LHR
-
USM
2 stops18h 25m
Etihad Airways
Wed 29/417:50
USM
-
LHR
2 stops25h 40m
Etihad Airways
Deal found 29/3£784
Fri 20/1117:05
LHR
-
USM
2 stops21h 00m
KLM
Thu 10/1207:00
USM
-
LHR
2 stops20h 50m
KLM
Deal found 1/4£785
Mon 20/420:45
LHR
-
USM
2 stops18h 50m
Etihad Airways
Fri 1/517:55
USM
-
LHR
2 stops27h 10m
Etihad Airways
Deal found 28/3£785
Wed 30/909:30
LHR
-
USM
2 stops17h 50m
Etihad Airways
Thu 15/1021:00
USM
-
LHR
2 stops21h 45m
Etihad Airways
Deal found 31/3£786
Sun 26/409:15
LHR
-
USM
2 stops20h 25m
Etihad Airways
Wed 6/506:00
USM
-
LHR
2 stops18h 45m
Etihad Airways
Deal found 1/4£787
Fri 1/520:45
LHR
-
USM
2 stops18h 50m
Etihad Airways
Fri 15/519:00
USM
-
LHR
2 stops23h 45m
Etihad Airways
Deal found 30/3£788
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 1 April 2026.
Sun 19/421:10
LHR
-
USM
2 stops18h 25m
Etihad Airways
Wed 29/417:50
USM
-
LHR
2 stops19h 35m
Etihad Airways
Deal found 30/3£783
Tue 28/415:30
LHR
-
USM
2 stops19h 25m
Qatar Airways
Sat 9/517:55
USM
-
LHR
2 stops19h 40m
Qatar Airways
Deal found 1/4£869
Mon 20/416:50
LHR
-
USM
2 stops22h 45m
Emirates
Tue 5/514:30
USM
-
LHR
2 stops22h 35m
Emirates
Deal found 29/3£998
Wed 13/509:30
LHR
-
USM
2 stops19h 35m
Etihad Airways
Sun 17/519:00
USM
-
LHR
2 stops23h 45m
Etihad Airways
Deal found 30/3£793
Thu 28/521:45
LHR
-
USM
2 stops17h 50m
Etihad Airways
Fri 26/615:50
USM
-
LHR
2 stops26h 55m
Etihad Airways
Deal found 30/3£795
Fri 1/509:00
LHR
-
USM
2 stops19h 30m
Qatar Airways
Tue 12/506:00
USM
-
LHR
2 stops18h 00m
Qatar Airways
Deal found 29/3£902
Fri 29/514:45
LHR
-
USM
2 stops23h 40m
Etihad Airways
Thu 25/619:00
USM
-
LHR
2 stops23h 45m
Etihad Airways
Deal found 30/3£798
Fri 29/509:00
LHR
-
USM
2 stops19h 30m
Qatar Airways
Tue 30/617:55
USM
-
LHR
2 stops18h 30m
Qatar Airways
Deal found 31/3£905
Sun 31/514:45
LHR
-
USM
2 stops23h 40m
Etihad Airways
Mon 29/615:25
USM
-
LHR
2 stops27h 20m
Etihad Airways
Deal found 30/3£798
Thu 28/521:45
LHR
-
USM
2 stops17h 50m
Etihad Airways
Thu 25/621:00
USM
-
LHR
2 stops21h 45m
Etihad Airways
Deal found 1/4£799
Thu 30/414:50
LHR
-
USM
2 stops23h 35m
Etihad Airways
Sun 10/519:00
USM
-
LHR
2 stops23h 45m
Etihad Airways
Deal found 1/4£865
Last-minute flights from Heathrow to Ko Samui
Discover last-minute flight deals from Heathrow to Ko Samui. Data last updated 1 April 2026 and is based on user searches.
Sat 4/421:10
LHR
-
USM
2 stops41h 15m
Multiple Airlines
Fri 24/417:55
USM
-
LHR
2 stops25h 35m
Multiple Airlines
Deal found 29/3£778
Sat 4/409:15
LHR
-
USM
2 stops29h 10m
Multiple Airlines
Sat 11/415:25
USM
-
LHR
2 stops29h 40m
Multiple Airlines
Deal found 28/3£782
Sat 4/409:15
LHR
-
USM
2 stops29h 10m
Multiple Airlines
Sat 18/409:15
USM
-
LHR
2 stops35h 50m
Multiple Airlines
Deal found 28/3£791
Wed 8/415:30
LHR
-
USM
2 stops19h 25m
Qatar Airways
Thu 23/417:55
USM
-
LHR
2 stops18h 30m
Qatar Airways
Deal found 28/3£793
Thu 16/421:10
LHR
-
USM
2 stops18h 25m
Etihad Airways
Thu 30/406:00
USM
-
LHR
2 stops19h 20m
Etihad Airways
Deal found 31/3£782
Mon 20/420:45
LHR
-
USM
2 stops18h 50m
Etihad Airways
Fri 1/517:55
USM
-
LHR
2 stops27h 10m
Etihad Airways
Deal found 28/3£785
Sun 26/421:10
LHR
-
USM
2 stops18h 25m
Etihad Airways
Tue 12/517:50
USM
-
LHR
2 stops24h 55m
Etihad Airways
Deal found 29/3£783
Sun 26/421:10
LHR
-
USM
2 stops29h 15m
Multiple Airlines
Sun 3/508:00
USM
-
LHR
2 stops29h 00m
Multiple Airlines
Deal found 27/3£785
Sun 26/409:15
LHR
-
USM
2 stops20h 25m
Etihad Airways
Thu 30/406:00
USM
-
LHR
2 stops19h 20m
Etihad Airways
Deal found 29/3£794
Mon 27/421:10
LHR
-
USM
2 stops18h 25m
Etihad Airways
Wed 29/417:50
USM
-
LHR
2 stops25h 40m
Etihad Airways
Deal found 29/3£784
Tue 28/421:10
LHR
-
USM
2 stops18h 25m
Etihad Airways
Thu 7/506:00
USM
-
LHR
2 stops18h 45m
Etihad Airways
Deal found 29/3£795
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 1 April 2026.
Mon 18/509:30
LHR
-
USM
2 stops27h 45m
Multiple Airlines
Deal found 30/3£334
Wed 16/922:40
LHR
-
USM
2 stops26h 30m
Multiple Airlines
Deal found 28/3£362
Mon 11/510:00
LHR
-
USM
2 stops28h 50m
Multiple Airlines
Deal found 31/3£371
Fri 15/509:30
LHR
-
USM
2 stops27h 45m
Multiple Airlines
Deal found 30/3£373
Wed 13/522:40
LHR
-
USM
2 stops26h 30m
Multiple Airlines
Deal found 31/3£381
Tue 12/520:25
LHR
-
USM
2 stops28h 45m
Multiple Airlines
Deal found 31/3£384
Tue 21/422:10
LHR
-
USM
2 stops27h 25m
Multiple Airlines
Deal found 30/3£384
Mon 15/622:00
LHR
-
USM
3 stops51h 10m
Multiple Airlines
Deal found 27/3£385
Mon 25/522:00
LHR
-
USM
3 stops51h 10m
Multiple Airlines
Deal found 30/3£395
Wed 22/410:10
LHR
-
USM
2 stops29h 25m
Multiple Airlines
Deal found 29/3£399
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 1 April 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 1 April 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Ko Samui that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest return flight
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Sun 19/4
21:10-21:35
2 stops18h 25m
Ko Samui
Wed 29/4
17:50-07:25
2 stops19h 35m
£783
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Wed 13/5
09:30-11:05
2 stops19h 35m
Ko Samui
Sun 17/5
19:00-12:45
2 stops23h 45m
£793
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Thu 28/5
21:45-21:35
2 stops17h 50m
Ko Samui
Fri 26/6
15:50-12:45
2 stops26h 55m
£795
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Fri 29/5
14:45-20:25
2 stops23h 40m
Ko Samui
Thu 25/6
19:00-12:45
2 stops23h 45m
£798
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Sun 31/5
14:45-20:25
2 stops23h 40m
Ko Samui
Mon 29/6
15:25-12:45
2 stops27h 20m
£798
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Thu 28/5
21:45-21:35
2 stops17h 50m
Ko Samui
Thu 25/6
21:00-12:45
2 stops21h 45m
£799
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Thu 30/4
14:50-20:25
2 stops23h 35m
Ko Samui
Sun 10/5
19:00-12:45
2 stops23h 45m
£865
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Tue 28/4
15:30-16:55
2 stops19h 25m
Ko Samui
Sat 9/5
17:55-07:35
2 stops19h 40m
£869
Fastest return journey
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Fri 1/5
09:00-10:30
2 stops19h 30m
Ko Samui
Tue 12/5
06:00-18:00
2 stops18h 00m
£902
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Fri 29/5
09:00-10:30
2 stops19h 30m
Ko Samui
Tue 30/6
17:55-06:25
2 stops18h 30m
£905
Flights are sorted by cheapest return flights first.
Deals found on 31/3
Showing 1-10 of 19 resultsSorted by cheapest first
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 13 March 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 £506). Flying from London Heathrow Airport to Ko Samui in September is currently the most expensive (average of £703). 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 1 April 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 much does it cost for a return flight from London Heathrow Airport to Ko Samui?
How often are flights from London to Ko Samui delayed?
About 11% of weekly flights between London and Ko Samui have experienced delays in the past year, with the average delay time being 155 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?
Monday 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 5% 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 83% 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 £537.
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 1 April 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.
Why when we’re about to board they suddenly announced the letters ABC to board first .. so what is the use us waiting at the door (with wheelchairs) ended up almost at the end to board and I can see people walking boarding first? Is this something new? You go by letters now?
Why when we’re about to board they suddenly announced the letters ABC to board first .. so what is the use us waiting at the door (with wheelchairs) ended up almost at the end to board and I can see people walking boarding first? Is this something new? You go by letters now?
Why when we’re about to board they suddenly announced the letters ABC to board first .. so what is the use us waiting at the door (with wheelchairs) ended up almost at the end to board and I can see people walking boarding first? Is this something new? You go by letters now?
Why when we’re about to board they suddenly announced the letters ABC to board first .. so what is the use us waiting at the door (with wheelchairs) ended up almost at the end to board and I can see people walking boarding first? Is this something new? You go by letters now?
Why when we’re about to board they suddenly announced the letters ABC to board first .. so what is the use us waiting at the door (with wheelchairs) ended up almost at the end to board and I can see people walking boarding first? Is this something new? You go by letters now?
Why when we’re about to board they suddenly announced the letters ABC to board first .. so what is the use us waiting at the door (with wheelchairs) ended up almost at the end to board and I can see people walking boarding first? Is this something new? You go by letters now?
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 14 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 18h 25m. Fly via Etihad Airways to get the fastest option. London Heathrow Airport and Ko Samui are separated by a distance of 6144 mi.
What are the cheapest airlines flying from London Heathrow Airport to Ko Samui round-trip?
Currently priced at £116, 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 £440 and £446, 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 £481. 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 £22 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 £506). Flying from London Heathrow Airport to Ko Samui in September is currently the most expensive (average of £703). 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 1 April 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 1 April 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.
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