Cheap flights from London to Ko Samui from £291
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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
Cheapflights Tip: The best prices from London to Ko Samui are usually found in September or May, booked 80 days in advance, depart on a Wednesday or Tuesday and return on a Friday
Cheap flight deals from London to Ko Samui
Discover tips and strategies to find the most affordable flight options for your journey from London (LON) 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 11 July 2025.
Round-trip from | £715 |
---|---|
One-way from | £291 |
Popular in | December |
Cheapest in | September |
Average price | £1,149 |
Find flight deals from London to Ko Samui
Cheapest flights from London to Ko SamuiExplore the most affordable flight options available from London to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.
Explore the most affordable flight options available from London to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from London 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 11 July 2025.
Use the filters below to find and compare flights from London to Ko Samui that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Sun 7/9
06:00-21:10
2 stops33h 10m
Ko Samui
Sat 20/9
13:30-08:40
2 stops25h 10m
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Mon 3/11
17:10-21:05
2 stops20h 55m
Ko Samui
Mon 1/12
10:00-21:40
2 stops18h 40m
LondonKo Samui
LCY - USM
LCYUSM
London City
Mon 3/11
13:30-21:05
2 stops24h 35m
Ko Samui
Mon 1/12
09:20-17:05
2 stops38h 45m
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Mon 5/1
19:30-21:05
2 stops42h 35m
Ko Samui
Mon 19/1
16:25-08:45
2 stops23h 20m
LondonKo Samui
LGW - USM
LGWUSM
London Gatwick
Mon 20/10
21:20-16:45
3 stops37h 25m
Ko Samui
Sat 1/11
12:25-15:50
3 stops34h 25m
LondonKo Samui
LTN - USM
LTNUSM
London Luton
Mon 20/10
11:40-16:45
3 stops47h 05m
Ko Samui
Sat 1/11
12:25-18:15
3 stops36h 50m
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Mon 24/11
17:05-21:05
2 stops21h 00m
Ko Samui
Sat 6/12
07:00-20:50
2 stops20h 50m
LondonKo Samui
LCY - USM
LCYUSM
London City
Mon 6/10
08:10-21:10
2 stops31h 00m
Ko Samui
Mon 13/10
08:45-08:50
2 stops30h 05m
LondonKo Samui
LGW - USM
LGWUSM
London Gatwick
Tue 2/9
14:55-11:55
2 stops39h 00m
Ko Samui
Fri 12/9
08:00-13:25
2 stops35h 25m
LondonKo Samui
LHR - USM
LHRUSM
London Heathrow
Wed 29/10
20:35-08:00
1 stop28h 25m
Ko Samui
Mon 10/11
19:25-15:20
1 stop26h 55m
Best time to book a flight from London to Ko Samui
Have a flexible travel schedule? Discover the best time to fly to Ko Samui from London with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from London to Ko Samui
How far ahead should I book a flight from London to Ko Samui?
Use this chart to determine the optimal time to book a return flight from London to Ko Samui. Price data was last updated on 27 June 2025.
The best time to book flights from London to Ko Samui is 80 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 to Ko Samui?
Currently, August is the cheapest month in which you can book a flight from London to Ko Samui (average of £1,019). Flying from London to Ko Samui in December is currently the most expensive (average of £1,669). 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 LON to USM?
Find hourly flight availability from London 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 11 July 2025.
It’s optimal to fly from London to Ko Samui in the afternoon. By choosing this option you can save up to 39% on the cost of your flight, compared to a flight at midday.
What is the cheapest day to fly from London to Ko Samui?
Use this chart to determine the cheapest time to fly return from London to Ko Samui. Price data was last updated on 16 December 2024.
Travellers seeking maximum savings on their London to Ko Samui flight should consider departing on Wednesday at midday when fares are most often at their lowest. Sunday evenings 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 to Ko Samui?
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 11 July 2025.
Check out reviews from past customers who have flown with EVA Air, Emirates, andSingapore Airlines from London to Ko Samui to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
Food
Comfort
Boarding
Overall
Crew
Reviews
Dale,May 2025
TPE - SFO
Entertainment
Food
Comfort
Boarding
Overall
Crew
Reviews
Dale,May 2025
TPE - SFO
Entertainment
Food
Comfort
Boarding
Overall
Crew
Reviews
Dale,May 2025
TPE - SFO
Entertainment
Food
Comfort
Boarding
Overall
Crew
Reviews
Dale,May 2025
TPE - SFO
Entertainment
Food
Comfort
Boarding
Overall
Crew
Reviews
Dale,May 2025
TPE - SFO
Entertainment
Food
Comfort
Boarding
Overall
Crew
Reviews
Dale,May 2025
TPE - SFO
Related info for your journey
Find useful and relevant information for your journey from London to Ko Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Fly from London to Ko Samui on these airlines
Choose from the following airlines for your flight from London to Ko Samui. Flights are based on user searches made on Cheapflights and were last updated on 11 July 2025.
Top 10 airlines flying from London to Ko Samui
Discover the top 10 airlines that operate flights from London 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 11 July 2025.
Fly with Cheapflights
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 London to Ko Samui?
When you search for this flight from London to Ko Samui, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.
Why should you use Cheapflights to find cheap flight tickets from London to Ko Samui?
Cheapflights simply makes it quick and affordable to book flights from London 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 London to Ko Samui with no change fees?
Need flexible booking options for your flight to Ko Samui from London? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.
Can Cheapflights notify me if prices for flights from London to Ko Samui become cheaper?
Not ready to book yet? You can track prices for flights from London to Ko Samui on Cheapflights with our Price Alert feature and get notified when better prices are available.