USM - LON

£253 Find Cheap Flights from Ko Samui to London – Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest return flight
£746
Typical prices: £961-£1,229
Multiple Airlines
Mon 17/12Sat 20/1
USM - LHR • 2 stops
Cheapest one-way flight
£229
Typical prices: £447-£594
Multiple Airlines
Wed 12/12
USM - LGW • 1 stop
Direct flights
Not available
There are currently no direct flights between Ko Samui and London. You'll need to take a connecting flight to reach the destination.
Insights
Insights
Top routes
USM - LGW
Cheapest • 21% average savings
USM - LHR
Most popular
Insights
Insights
When to travel
September
Cheapest • 23% price drop
August
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Bangkok Suvarnabhumi (BKK)
Cheapest • Avg £1,039 (return)
Singapore Changi (SIN)
Shortest trip • 17h 59m (one-way)
Insights
Insights
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We hope you enjoy your trip to London!
Flight Deals
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Expert advice
Flight Deals

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

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

Recent return flight deals from Ko Samui to London

Thu, 17 Dec - Wed, 20 Jan
Multiple Airlines Logo
17:40 - 11:30USM  Ko Samui-LHR London Heathrow
24h 50m2 stops Bangkok Suvarnabhumi New Delhi Indira Gandhi Intl
Multiple Airlines Logo
21:00 - 09:20LHR  London Heathrow-USM Ko Samui
29h 20m2 stops Shanghai Pu Dong Bangkok Suvarnabhumi
£746Multiple Airlines
Thu, 17 Dec - Wed, 20 Jan
Multiple Airlines Logo
21:10 - 12:05USM  Ko Samui-LHR London Heathrow
21h 55m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
Multiple Airlines Logo
16:30 - 20:25LHR  London Heathrow-USM Ko Samui
20h 55m3 stops Rome Fiumicino Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
£752Multiple Airlines
Mon, 7 Dec - Mon, 14 Dec
Multiple Airlines Logo
12:00 - 07:10USM  Ko Samui-LGW London Gatwick
26h 10m2 stops Singapore Changi Shanghai Pu Dong
Multiple Airlines Logo
13:40 - 21:20LGW  London Gatwick-USM Ko Samui
24h 40m3 stops Paris Charles de Gaulle New Delhi Indira Gandhi Intl Bangkok Suvarnabhumi
£802Multiple Airlines
Thu, 17 Dec - Wed, 20 Jan
Multiple Airlines Logo
18:30 - 11:30USM  Ko Samui-LHR London Heathrow
24h 00m2 stops Bangkok Suvarnabhumi New Delhi Indira Gandhi Intl
Multiple Airlines Logo
21:20 - 20:25LHR  London Heathrow-USM Ko Samui
16h 05m1 stop Bangkok Suvarnabhumi
£830Multiple Airlines
Mon, 7 Dec - Mon, 14 Dec
Multiple Airlines Logo
21:10 - 17:00USM  Ko Samui-LHR London Heathrow
26h 50m2 stops Bangkok Suvarnabhumi Stockholm Arlanda
Multiple Airlines Logo
14:45 - 20:25LHR  London Heathrow-USM Ko Samui
22h 40m3 stops Paris Charles de Gaulle Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
£845Multiple Airlines
Thu, 5 Nov - Mon, 9 Nov
Emirates Logo
18:15 - 11:40USM  Ko Samui-LGW London Gatwick
24h 25m2 stops Phuket City Dubai Intl
Emirates Logo
23:55 - 10:40LGW  London Gatwick-USM Ko Samui
27h 45m2 stops Dubai Intl Phuket City
£851Emirates
Thu, 5 Nov - Mon, 9 Nov
Emirates Logo
18:15 - 20:50USM  Ko Samui-LGW London Gatwick
33h 35m2 stops Phuket City Dubai Intl
Emirates Logo
09:40 - 10:40LGW  London Gatwick-USM Ko Samui
18h 00m2 stops Dubai Intl Phuket City
£853Emirates
Thu, 5 Nov - Mon, 9 Nov
Emirates Logo
18:15 - 20:50USM  Ko Samui-LGW London Gatwick
33h 35m2 stops Phuket City Dubai Intl
Emirates Logo
23:55 - 10:40LGW  London Gatwick-USM Ko Samui
27h 45m2 stops Dubai Intl Phuket City
£854Emirates
Sat, 5 Dec - Sat, 12 Dec
Multiple Airlines Logo
19:00 - 15:55USM  Ko Samui-LGW London Gatwick
27h 55m2 stops Phuket City Bangkok Suvarnabhumi
Multiple Airlines Logo
13:10 - 21:20LGW  London Gatwick-USM Ko Samui
25h 10m3 stops Milan Malpensa New Delhi Indira Gandhi Intl Bangkok Suvarnabhumi
£862Multiple Airlines
Sat, 5 Dec - Sat, 12 Dec
Multiple Airlines Logo
21:30 - 15:55USM  Ko Samui-LGW London Gatwick
25h 25m1 stop Bangkok Suvarnabhumi
Multiple Airlines Logo
13:10 - 21:20LGW  London Gatwick-USM Ko Samui
25h 10m3 stops Milan Malpensa New Delhi Indira Gandhi Intl Bangkok Suvarnabhumi
£867Multiple Airlines
Booking Insights

Price, demand, and travel trends for Ko Samui to London 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 Ko Samui to London flight route?

Ko Samui (USM) to London Gatwick Airport (LGW) is the cheapest Ko Samui to London route, averaging £851 return. Other Ko Samui to London routes average £1,187, based on KAYAK data over the past 12 months.

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

Based on deals KAYAK users found in the last 12 months, Monday is the cheapest day of the week to fly from Ko Samui to London. It’s 11% cheaper than the average day, while Friday is the most expensive, with prices 26% higher.

Find deals
Expert advice

Expert advice for your flight from Ko Samui to London

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on Finnair

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Marisa Garcia

Marisa Garcia

Expert on Iberia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialising in airline interiors and regulations. 10 years ago, she pivoted to journalism. She shares her insights in leading aviation, travel and business publications and on her site, FlightChic.

Read more
Duncan Madden

Duncan Madden

Expert on British Airways

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Read more

Key details for Ko Samui to London flights

Low season

December

Cheapest flight

£229
Beat the crowds with an average 64% drop in traveller numbers.
The most popular month to fly with an average 104% increase in traveller numbers.
One-way flight from Ko Samui to London Gatwick Airport

When to book flights from Ko Samui to London

Are your dates flexible? Find out the best times to travel from Ko Samui to London based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your Ko Samui to London 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 Ko Samui to London?

    Three cabin classes are available on flights from Ko Samui to London:

    • Economy class
    • Premium Economy Class
    • Business Class

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

    A direct flight from Ko Samui to London takes 00m, covering 6,130 miles.

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

    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 Ko Samui to London flight?

    Return flights from Ko Samui to London range from £961 to £1,229, with an average of £1,064 over the past 12 months. Anything below £961 counts as a good deal.

  • Have flight prices from Ko Samui to London 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 £746 to £5,876. That means the highest observed fare was about 8x higher than the lowest one.

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

    One-way fares from Ko Samui to London are currently lower than usual. Average one-way flight prices are about £272, which is 47% below the typical average for this route.

  • What car hire options are available in London?

    Since London is served by multiple airports, car hire options and rates can vary depending on which one you fly into.
    Near London Heathrow Airport (LHR) – daily rates from around £5:

    • GREEN MOTION
    • DRIVALIA
    • Europcar
    • Alamo
    • Hertz

    Near London Gatwick Airport (LGW) – daily rates from around £6:

    • GREEN MOTION
    • DRIVALIA
    • U-Save
    • Europcar
    • Alamo

    Near London City Airport (LCY) – daily rates from around £8:

    • GREEN MOTION
    • Budget
    • Hertz
    • Avis
    • Sixt

    Near London Stansted Airport (STN) – daily rates from around £7:

    • GREEN MOTION
    • DRIVALIA
    • Europcar
    • Alamo
    • U-Save

    Near London Luton Airport (LTN) – daily rates from around £8:

    • GREEN MOTION
    • DRIVALIA
    • Alamo
    • Europcar
    • U-Save

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

    Flights from Ko Samui to London usually depart from Ko Samui (USM) and may arrive at 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).

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

    Connecting flights from Ko Samui to London most commonly pass through:

    • Bangkok Suvarnabhumi (BKK) – 96% of one-stop connections
    • Singapore Changi (SIN) – 4% of one-stop connections

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

    Yes. Flexible dates can save you up to 30% on flights from Ko Samui to London. Monday is the cheapest departure day at £951 return on average, while Friday is the most expensive at £1,350, a difference of £399.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

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

    Flying via Bangkok Suvarnabhumi (BKK) gives the shortest average 1-stop total travel time of 16h 03m, compared to 17h 59m via Singapore Changi (SIN).

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

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

  • What popular places can I visit in London?

    Some of the most popular sights in London are Hyde Park, Tower Bridge, and Royal Albert Hall. These are among the most viewed places in London on KAYAK.

Your guide to booking Ko Samui to London 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 and avoid flying on Friday. On this route, Monday flights average £951, about £399 less than Friday fares (30% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Ko Samui to London trip for September. Fares historically average £814 return in that month – typically £525 less than the most expensive month, which is August (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, hotels close to the airport you're flying into can be a convenient option.

    Near London City Airport

    • Good Hotel London
    • Aloft London Excel
    • Novotel London Excel

    Near London Heathrow Airport

    • Hilton London Heathrow Airport

    Near London Gatwick Airport

    • Premier Inn London Gatwick Airport

More options for your flight from Ko Samui to London

Complete your trip to London with a hotel stay or car hire

Car hire in London
Hotels in London
Holidays in London