LON - USM

฿16,483 Find Cheap Flights from London to Ko Samui – Compare and Save

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Everything you should know

Cheapest return flight
฿30,906
Typical prices: ฿37,147-฿53,512
Multiple Airlines
Sun 11/11Wed 21/11
LHR - USM • 2 stops
Cheapest one-way flight
฿16,652
Typical prices: ฿21,894-฿34,427
Multiple Airlines
Wed 7/11
LHR - USM • 2 stops
Direct flights
There are currently no direct flights between London and Ko Samui. You'll need to take a connecting flight to reach the destination.
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Insights
Top routes
Cheapest • 18% average savings
Most popular
Insights
Insights
Avoid delays
Most punctual • 85% on-time
Best time • Fewest delays
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 13 weeks in advance save around 22% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 16% price drop
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Cheapest • Avg ฿47,653 (return)
Shortest trip • 16h 06m (one-way)
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Insights
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We hope you enjoy your trip to Ko Samui!
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Booking Insights
Flight Deals

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

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from London to Ko Samui

Wed 11 Nov - Sat 21 Nov
Multiple Airlines Logo
12:30 - 20:25LHR  London Heathrow-USM Ko Samui
24h 55m2 stops Xiamen Gaoqi Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
07:00 - 06:25USM  Ko Samui-LHR London Heathrow
30h 25m2 stops Bangkok Suvarnabhumi Xiamen Gaoqi Intl
฿30,906Multiple Airlines
Thu 21 Jan - Fri 5 Mar
Multiple Airlines Logo
12:30 - 20:25LHR  London Heathrow-USM Ko Samui
24h 55m2 stops Shanghai Pu Dong Bangkok Suvarnabhumi
Multiple Airlines Logo
07:15 - 06:25USM  Ko Samui-LHR London Heathrow
30h 10m2 stops Bangkok Suvarnabhumi Shanghai Pu Dong
฿31,109Multiple Airlines
Mon 15 Mar - Mon 29 Mar
Multiple Airlines Logo
13:30 - 20:25LHR  London Heathrow-USM Ko Samui
23h 55m2 stops Mumbai Chhatrapati Shivaji Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
07:50 - 10:15USM  Ko Samui-LHR London Heathrow
32h 25m2 stops Bangkok Suvarnabhumi Mumbai Chhatrapati Shivaji Intl
฿31,210Multiple Airlines
Sun 22 Nov - Sun 29 Nov
Multiple Airlines Logo
21:00 - 10:40LHR  London Heathrow-USM Ko Samui
30h 40m2 stops Shanghai Pu Dong Phuket City
Multiple Airlines Logo
11:10 - 17:30USM  Ko Samui-LHR London Heathrow
37h 20m2 stops Phuket City Shanghai Pu Dong
฿31,278Multiple Airlines
Sun 22 Nov - Sun 6 Dec
Multiple Airlines Logo
21:00 - 10:40LHR  London Heathrow-USM Ko Samui
30h 40m2 stops Shanghai Pu Dong Phuket City
Multiple Airlines Logo
18:15 - 17:30USM  Ko Samui-LHR London Heathrow
30h 15m2 stops Phuket City Shanghai Pu Dong
฿31,312Multiple Airlines
Sun 17 Jan - Thu 28 Jan
Multiple Airlines Logo
22:15 - 08:00LHR  London Heathrow-USM Ko Samui
26h 45m2 stops Athens Eleftherios V. Singapore Changi
Multiple Airlines Logo
08:55 - 05:55USM  Ko Samui-LHR London Heathrow
28h 00m2 stops Singapore Changi Muscat Seeb
฿31,413Multiple Airlines
Tue 24 Nov - Tue 1 Dec
Multiple Airlines Logo
21:00 - 10:40LHR  London Heathrow-USM Ko Samui
30h 40m2 stops Shanghai Pu Dong Phuket City
Multiple Airlines Logo
18:15 - 17:30USM  Ko Samui-LHR London Heathrow
30h 15m2 stops Phuket City Shanghai Pu Dong
฿31,447Multiple Airlines
Sat 28 Nov - Fri 11 Dec
Multiple Airlines Logo
12:30 - 17:30LHR  London Heathrow-USM Ko Samui
22h 00m2 stops Shanghai Pu Dong Phuket City
Multiple Airlines Logo
18:15 - 17:30USM  Ko Samui-LHR London Heathrow
30h 15m2 stops Phuket City Shanghai Pu Dong
฿31,514Multiple Airlines
Sat 28 Nov - Fri 11 Dec
Multiple Airlines Logo
12:30 - 18:25LHR  London Heathrow-USM Ko Samui
22h 55m2 stops Shanghai Pu Dong Phuket City
Multiple Airlines Logo
18:15 - 17:30USM  Ko Samui-LHR London Heathrow
30h 15m2 stops Phuket City Shanghai Pu Dong
฿31,582Multiple Airlines
Thu 26 Nov - Wed 9 Dec
Multiple Airlines Logo
06:50 - 15:10LHR  London Heathrow-USM Ko Samui
25h 20m3 stops Brussels Bruxelles-National Chengdu Tianfu Intl Phuket City
Multiple Airlines Logo
07:55 - 11:05USM  Ko Samui-LHR London Heathrow
34h 10m2 stops Bangkok Suvarnabhumi Mumbai Chhatrapati Shivaji Intl
฿31,616Multiple Airlines
Booking Insights

Price, demand, and travel trends for London to Ko Samui flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

What is the cheapest London to Ko Samui flight route?

London City Airport (LCY) to Ko Samui (USM) is the cheapest London to Ko Samui route, averaging ฿32,258 return. Other London to Ko Samui routes average ฿40,824, based on KAYAK data over the past 12 months.

What's the cheapest day of the week to fly from London to Ko Samui?

Based on deals KAYAK users found in the last 12 months, Sunday is the cheapest day of the week to fly from London to Ko Samui. It's 7% cheaper than the average day, while Saturday is the most expensive, with prices 7% higher.

What is the cheapest month to fly from London to Ko Samui?

•November is the cheapest month to fly from London to Ko Samui at ฿36,547 return.
•December (฿55,868) and July (฿50,700) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 52% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from London to Ko Samui the cheapest?

Flights from London to Ko Samui are cheapest 13 weeks before departure. Booking in this window typically costs about 22% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Key details for London to Ko Samui flights

Low season

October

Cheapest flight

฿16,652
Beat the crowds with an average 48% drop in travellers.
The most popular month to fly with an average 35% increase in travellers.
One-way flight from London Heathrow Airport 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 return price

Your London to Ko Samui flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines, and booking tips.

  • Which cabin classes can I book on flights from London to Ko Samui?

    Only Economy class is available on flights from London to Ko Samui.

  • How long is a flight from London to Ko Samui?

    A direct flight from London to Ko Samui takes 00m, covering 15,877 km.

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

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a London to Ko Samui flight?

    Return flights from London to Ko Samui range from ฿37,147 to ฿53,512, with an average of ฿43,739 over the past 12 months. Anything below ฿37,147 counts as a good deal.

  • How expensive are last-minute London to Ko Samui flights?

    Last-minute fares on this route (booked within two weeks of departure) run 10% above the ฿43,739 route average. Book 13 weeks before departure for the lowest fares.

  • How does on-time performance compare across airlines flying from London to Ko Samui?

    บริติชแอร์เวย์ is the only airline operating London to Ko Samui flights. 85% of its flights are on time.

  • Have flight prices from London to Ko Samui changed much recently?

    Yes. Based on fares seen in the past 5 days, return flight prices on this route showed a wide range, from about ฿30,906 to ฿219,789. That means the highest observed fare was about 7x higher than the lowest one.

  • How are flight prices from London to Ko Samui looking right now?

    One-way fares from London to Ko Samui are currently lower than usual. Average one-way flight prices are about ฿17,578, which is 36% below the typical average for this route.

  • Which car hire options are available at Ko Samui Airport (USM)?

    Ko Samui Airport (USM) hosts 5 major car rental companies, with daily rates starting from around ฿431 for economy cars. Top options include:

    • Drive Car Rental
    • Alamo
    • Sixt
    • Enterprise Rent-A-Car
    • Thai Rent

  • Which airports can I use when flying from London to Ko Samui?

    Flights from London to Ko Samui may depart from several airports in London area, including London City (LCY), London Gatwick (LGW), London Heathrow (LHR), London Luton (LTN), London Southend (SEN) and London Stansted (STN). Flights usually arrive at Ko Samui (USM).

  • What time of day has the fewest delays on flights from London to Ko Samui?

    Afternoon flights have the fewest delays on this route.

  • At what point is a flight considered delayed from London to Ko Samui?

    A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the London to Ko Samui route, 15% of flights were delayed in the past three months, with delays averaging 1h 50m.

  • Which airports do connecting flights from London to Ko Samui pass through?

    One-stop flights from London to Ko Samui most commonly connect through:

    • Bangkok Suvarnabhumi (BKK) – 80% of one-stop connections
    • Singapore Changi (SIN) – 18% of one-stop connections
    • Hong Kong Intl (HKG) – 2% of one-stop connections
    • Phuket City (HKT) – 0% of one-stop connections

  • Can I save money by using flexible dates for flights from London to Ko Samui?

    Yes. Flexible dates can save you up to 13% on flights from London to Ko Samui. Sunday is the cheapest departure day at ฿41,006 return on average, while Saturday is the most expensive at ฿47,052, a difference of ฿6,046.

    Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

  • How much time can I save by choosing a different stopover airport from London to Ko Samui?

    Flying via Phuket City (HKT) gives the shortest average 1-stop total travel time of 16h 06m, compared to 16h 17m via Bangkok Suvarnabhumi (BKK) and 18h 26m via Singapore Changi (SIN).

  • What is the time difference between London and Ko Samui?

    Ko Samui is 7 hours ahead of London (Indochina Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Ko Samui?

    Some of the most popular sights in Ko Samui are Chaweng Beach, Lamai Beach, and Bophut Beach. These are among the most viewed places in Ko Samui on KAYAK.

  • Are some flights on this route more carbon efficient than others?

    Thai Airways is a good airline to choose if you're looking to reduce your carbon footprint on your flight from London to Koh Samui. Typically leaving twice daily, just after noon and in the evening, these flights emit as around 35% less CO2 than a standard one. This is a one-stop route that takes around 14-16 hours. You'll stop at Bangkok Suvarnabhumi Airport (BKK) for about 1 hour to change planes.

  • Do the airports offer limited-mobility assistance?

    All London airports conform to the UK's national accessibility requirements. They are fully wheelchair accessible and also have facilities for travellers with hidden disabilities, like induction loops. Yellow lanyards are available to make it easier for assistance staff to spot you. You can also book personal assistance (at least 48 hours in advance) through your airline or travel agent. Koh Samui Airport is fully wheelchair accessible, with dedicated assistance for people with decreased mobility. Staff are constantly on hand and there's no need to book.

  • Can I hire a car at Koh Samui International Airport?

    About a half dozen of the world's most popular car hire companies have branches at Koh Samui Airport. It's a relatively small airport, so you won't have any trouble spotting these in the Arrivals terminal once you've claimed your luggage and passed through customs. As car stocks are limited, it's wise to book in advance.

  • How do I get from Koh Samui International Airport to the town centre?

    Koh Samui Airport is near the town of Bo Phut, a little way north of the island's main city of Chaweng. If you don't hire a car, your transport options to get to Bo Phut are to catch a taxi or an airport shuttle, both of which take about 10 minutes to make the trip. Getting directly to Chaweng takes roughly the same amount of time using the same transport modes, give or take a couple of minutes.

Your guide to booking London to Ko Samui flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Sunday departure and avoid flying on Saturday. On this route, Sunday flights average ฿41,006, which is about ฿6,046 less than Saturday fares (13% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 13 weeks before you fly. On this route, that window historically saves about 22% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your London to Ko Samui trip for November. Fares historically average ฿36,547 return in that month – typically ฿19,321 less than the most expensive month, which is December (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Ko Samui Airport.

    • Ozo Chaweng Samui - Sha Extra Plus
    • Melia Koh Samui
    • Royal Muang Samui Villas
  • Koh Samui is a resort island off Thailand's coast. To visit mainland cities like Phuket and Bangkok, you can catch one of the dozens of daily flights on Bangkok Airways or Thai AirAsia.
  • If you're flying to Koh Samui with children, Heathrow (LHR) and Gatwick (LGW) are convenient airports. They have supervised Stay & Play areas and Kids' Zones, where youngsters can amuse themselves while waiting for your flight.
  • EVA Air offers one of the more comfortable economy-class flights from London to Koh Samui. You can enjoy on-demand video, with power and USB outlets built into your seat. You'll generally also be served a meal.
  • Koh Samui Airport (USM) is owned and operated by Bangkok Airways, the main local Thailand air carrier. This allows you to easily and inexpensively catch connecting domestic flights to cities in the rest of the country.
  • Choose your London airport based on where you're coming from. Heathrow is on the western outskirts, with Stansted (STN) quite a way north. Gatwick is about 30 minutes south of London, while London City Airport (LCY) is close to Central London.

More options for your flight from London to Ko Samui

Complete your trip to Ko Samui with a hotel stay or car hire