LON - USM

฿13,197 Find Cheap Flights from London to Ko Samui – Compare and Save

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Everything you should know

Cheapest return flight
฿29,859
Typical prices: ฿35,787-฿51,577
Multiple Airlines
Thu 11/10Thu 18/10
LGW - USM • 3 stops
Cheapest one-way flight
฿13,197
Typical prices: ฿21,644-฿33,197
Multiple Airlines
Fri 21/9
STN - USM • 3 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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Top routes
Cheapest • 17% average savings
Most popular
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Avoid delays
Most punctual • 87% on-time
Best time • Fewest delays
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Insights
When to book
in advance
Our data shows that travellers who book at least 13 weeks in advance save around 15% compared to booking last minute.
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Insights
When to travel
Cheapest • 16% price drop
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Cheapest • Avg ฿46,333 (return)
Shortest trip • 16h 06m (one-way)
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We hope you enjoy your trip to Ko Samui!
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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

Fri 23 Oct - Sun 1 Nov
Multiple Airlines Logo
06:25 - 15:25LGW  London Gatwick-USM Ko Samui
27h 00m3 stops Geneva Geneve-Cointrin Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
08:15 - 08:35USM  Ko Samui-LGW London Gatwick
31h 20m2 stops Phuket City Oslo Gardermoen
฿29,760Multiple Airlines
Sun 11 Oct - Sun 18 Oct
Multiple Airlines Logo
05:45 - 13:55LGW  London Gatwick-USM Ko Samui
26h 10m3 stops Athens Eleftherios V. Sharjah Phuket City
Multiple Airlines Logo
20:50 - 15:00USM  Ko Samui-LGW London Gatwick
24h 10m2 stops Bangkok Suvarnabhumi Shanghai Pu Dong
฿29,859Multiple Airlines
Mon 26 Oct - Mon 2 Nov
Multiple Airlines Logo
16:25 - 20:25LGW  London Gatwick-USM Ko Samui
21h 00m3 stops Václav Havel Prague Sharjah Bangkok Suvarnabhumi
Multiple Airlines Logo
11:10 - 07:45USM  Ko Samui-LGW London Gatwick
27h 35m2 stops Phuket City Sharjah
฿29,925Multiple Airlines
Fri 23 Oct - Sun 1 Nov
Multiple Airlines Logo
06:25 - 15:25LGW  London Gatwick-USM Ko Samui
27h 00m3 stops Geneva Geneve-Cointrin Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
08:15 - 10:30USM  Ko Samui-LGW London Gatwick
33h 15m3 stops Phuket City Oslo Gardermoen Stavanger Sola
฿30,024Multiple Airlines
Mon 30 Nov - Wed 23 Dec
Multiple Airlines Logo
06:00 - 15:35LHR  London Heathrow-USM Ko Samui
26h 35m2 stops Vienna Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
10:00 - 08:05USM  Ko Samui-LHR London Heathrow
29h 05m2 stops Bangkok Suvarnabhumi Zurich
฿30,287Multiple Airlines
Mon 30 Nov - Wed 23 Dec
Multiple Airlines Logo
06:00 - 15:35LHR  London Heathrow-USM Ko Samui
26h 35m2 stops Vienna Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
10:00 - 08:05USM  Ko Samui-LHR London Heathrow
29h 05m2 stops Bangkok Suvarnabhumi Zurich
฿30,287Multiple Airlines
Fri 30 Oct - Sun 8 Nov
Multiple Airlines Logo
08:45 - 11:30LHR  London Heathrow-USM Ko Samui
19h 45m2 stops New Delhi Indira Gandhi Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
12:25 - 11:35USM  Ko Samui-LHR London Heathrow
30h 10m3 stops Krabi Abu Dhabi Zayed Intl Duesseldorf Intl
฿30,386Multiple Airlines
Mon 26 Oct - Thu 5 Nov
Multiple Airlines Logo
16:25 - 19:50LGW  London Gatwick-USM Ko Samui
20h 25m3 stops Václav Havel Prague Sharjah Bangkok Suvarnabhumi
Multiple Airlines Logo
14:05 - 06:30USM  Ko Samui-LGW London Gatwick
23h 25m2 stops Bangkok Suvarnabhumi Guangzhou Baiyun
฿30,452Multiple Airlines
Thu 1 Oct - Sat 24 Oct
Multiple Airlines Logo
06:20 - 13:55LTN  London Luton-USM Ko Samui
25h 35m3 stops Athens Eleftherios V. Sharjah Phuket City
Multiple Airlines Logo
06:00 - 00:30USM  Ko Samui-LTN London Luton
24h 30m3 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl Dublin
฿30,452Multiple Airlines
Tue 2 Mar - Sat 13 Mar
Multiple Airlines Logo
10:30 - 20:25LGW  London Gatwick-USM Ko Samui
26h 55m2 stops Shanghai Pu Dong Bangkok Suvarnabhumi
Multiple Airlines Logo
07:00 - 14:00USM  Ko Samui-LGW London Gatwick
38h 00m2 stops Bangkok Suvarnabhumi Shanghai Pu Dong
฿30,485Multiple 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 from London to Ko Samui 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 ฿31,509 return. Other London to Ko Samui routes average ฿38,998, based on KAYAK data over the past 12 months.

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

Monday is the cheapest day of the week to fly from London to Ko Samui and is 6% cheaper than the average day. Friday is the most expensive day with flight prices 6% higher than average. Based on deals found by KAYAK users in the last 12 months.

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 ฿35,269 return.
  • December (฿54,768) and July (฿47,807) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 55% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices 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 15% 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

฿13,197
Best time to beat the crowds (5% less expensive on average)
Most popular time to fly and prices are also 4% lower on average.
Flights from London Stansted 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 route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • 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.

  • 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).

  • 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.

  • 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) – 82% of one-stop connections
    • Singapore Changi (SIN) – 17% of one-stop connections
    • Hong Kong Intl (HKG) – 1% of one-stop connections
    • Phuket City (HKT) – 0% of one-stop connections

    Bangkok Suvarnabhumi (BKK) handles the largest share of one-stop connections on this route.

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

    Yes. Being flexible with your travel dates can save you up to 12% on the London to Ko Samui route. Monday is the cheapest departure day at ฿39,394 return on average, while Friday is the most expensive at ฿44,408, a difference of ฿5,015. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • At what point is a flight considered delayed on the route 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, 13% of flights were delayed in the past 3 months, with delays averaging 2 hours 23 minutes.

  • What popular places can I visit in Ko Samui?

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

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

    Last-minute fares on this route (booked within 2 weeks of departure) run 7% above the route average of ฿41,822. Book 13 weeks before departure for the lowest fares.

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

    A direct flight from London to Ko Samui takes 0h 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 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 ฿13,709, which is 48% below the typical average for this route.

  • How does บริติชแอร์เวย์'s on-time performance compare to other airlines on London to Ko Samui flights?

    บริติชแอร์เวย์ is the only airline operating London to Ko Samui flights. 87% of its flights are on time.

  • How do delay rates compare for morning and evening flights from London to Ko Samui?

    Morning flights have the fewest delays on this route. Delays tend to pile up throughout the day as one late flight pushes the next, so earlier departures are usually more reliable.

  • 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 15m via Bangkok Suvarnabhumi (BKK) and 18h 29m via Singapore Changi (SIN).

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

    Ko Samui is 6 hours ahead of London (Indochina Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

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

    Ko Samui Airport (USM) hosts 5 major car hire companies, with daily rates starting from around ฿448 for economy cars. Top options include:
    • Drive Car Rental
    • Alamo
    • Sixt
    • Enterprise Rent-A-Car
    • Hertz

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

    Return flights from London to Ko Samui range from ฿35,787 to ฿51,577, with an average of ฿41,822 over the past 12 months. Anything below ฿35,787 counts as a good deal.

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 Monday departure instead of Friday. On this route, Monday flights average ฿39,394 – about ฿5,015 less than Friday (11% 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 15% 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 ฿35,269 return in that month – typically ฿19,499 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
    - Cosi Samui Chaweng Beach
    - Melia Koh Samui
  • 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