USM - LHR

£310 Find Cheap Flights from Ko Samui to London Heathrow Airport – Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 25% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest return flight
£673
Typical prices: £939-£1,105
Multiple Airlines
Thu 25/10Thu 1/11
USM - LHR • 2 stops
Cheapest one-way flight
£274
Typical prices: £462-£591
Multiple Airlines
Sat 27/10
USM - LHR • 2 stops
Direct flights
Not available
There are currently no direct flights between Ko Samui and London Heathrow Airport. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
September
Cheapest • 13% price drop
August
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Bangkok Suvarnabhumi (BKK)
Cheapest • Avg £1,043 (return)
Singapore Changi (SIN)
Shortest trip • 17h 59m (one-way)
Insights
Insights
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you enjoy your trip to London Heathrow Airport!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Ko Samui to Heathrow (USM-LHR)

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

Recent return flight deals from Ko Samui to Heathrow

Sun, 25 Oct - Sun, 1 Nov
Multiple Airlines Logo
12:25 - 06:40USM  Ko Samui-LHR London Heathrow
25h 15m2 stops Krabi Abu Dhabi Zayed Intl
Multiple Airlines Logo
06:00 - 11:30LHR  London Heathrow-USM Ko Samui
22h 30m3 stops Vienna Intl Sharjah Bangkok Suvarnabhumi
£673Multiple Airlines
Mon, 8 Mar - Thu, 11 Mar
Multiple Airlines Logo
17:05 - 11:05USM  Ko Samui-LHR London Heathrow
25h 00m2 stops Bangkok Suvarnabhumi Mumbai Chhatrapati Shivaji Intl
Multiple Airlines Logo
13:30 - 17:00LHR  London Heathrow-USM Ko Samui
20h 30m2 stops Mumbai Chhatrapati Shivaji Intl Bangkok Suvarnabhumi
£742Multiple Airlines
Sun, 25 Oct - Sun, 1 Nov
Multiple Airlines Logo
13:25 - 14:45USM  Ko Samui-LHR London Heathrow
32h 20m2 stops Singapore Changi Manama Bahrain Intl
Multiple Airlines Logo
08:25 - 10:35LHR  London Heathrow-USM Ko Samui
19h 10m2 stops Muscat Seeb Bangkok Suvarnabhumi
£759Multiple Airlines
Wed, 30 Sep - Thu, 8 Oct
Multiple Airlines Logo
17:25 - 15:20USM  Ko Samui-LHR London Heathrow
27h 55m2 stops Bangkok Suvarnabhumi Manama Bahrain Intl
Multiple Airlines Logo
10:00 - 15:25LHR  London Heathrow-USM Ko Samui
23h 25m2 stops Manama Bahrain Intl Bangkok Suvarnabhumi
£778Multiple Airlines
Tue, 13 Oct - Tue, 20 Oct
Multiple Airlines Logo
11:05 - 07:00USM  Ko Samui-LHR London Heathrow
25h 55m3 stops Singapore Changi Kuala Lumpur Intl Abu Dhabi Zayed Intl
Multiple Airlines Logo
21:45 - 10:10LHR  London Heathrow-USM Ko Samui
30h 25m3 stops Abu Dhabi Zayed Intl Kuala Lumpur Intl Singapore Changi
£784Multiple Airlines
Tue, 13 Oct - Tue, 20 Oct
Multiple Airlines Logo
13:30 - 07:00USM  Ko Samui-LHR London Heathrow
23h 30m2 stops Singapore Changi Abu Dhabi Zayed Intl
Multiple Airlines Logo
16:35 - 21:35LHR  London Heathrow-USM Ko Samui
23h 00m3 stops Athens Eleftherios V. Sharjah Bangkok Suvarnabhumi
£787Multiple Airlines
Mon, 19 Oct - Mon, 2 Nov
Etihad Airways Logo
20:35 - 12:45USM  Ko Samui-LHR London Heathrow
22h 10m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
Etihad Airways Logo
20:55 - 07:10LHR  London Heathrow-USM Ko Samui
27h 15m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
£823Etihad Airways
Mon, 19 Oct - Mon, 2 Nov
Multiple Airlines Logo
19:00 - 06:30USM  Ko Samui-LHR London Heathrow
17h 30m2 stops Phuket City Doha Hamad Intl
Multiple Airlines Logo
08:35 - 07:10LHR  London Heathrow-USM Ko Samui
39h 35m2 stops Doha Hamad Intl Bangkok Suvarnabhumi
£829Multiple Airlines
Wed, 28 Oct - Wed, 4 Nov
Multiple Airlines Logo
13:25 - 14:45USM  Ko Samui-LHR London Heathrow
32h 20m2 stops Singapore Changi Manama Bahrain Intl
Multiple Airlines Logo
08:25 - 11:30LHR  London Heathrow-USM Ko Samui
20h 05m2 stops Muscat Seeb Bangkok Suvarnabhumi
£842Multiple Airlines
Tue, 13 Oct - Tue, 20 Oct
Multiple Airlines Logo
21:00 - 07:15USM  Ko Samui-LHR London Heathrow
16h 15m1 stop Bangkok Suvarnabhumi
Multiple Airlines Logo
22:00 - 07:10LHR  London Heathrow-USM Ko Samui
27h 10m2 stops Shenzhen Bangkok Suvarnabhumi
£865Multiple Airlines
Booking Insights

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

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from Ko Samui to London Heathrow Airport with more confidence.

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

Monday is the cheapest day of the week to fly from Ko Samui to London Heathrow Airport and is 6% cheaper than the average day. Friday is the most expensive day with flight prices 39% higher than average. Based on deals found by KAYAK users in the last 12 months.

Find deals
Expert advice

Expert advice for your flight from Ko Samui to Heathrow

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

Blane Bachelor

Expert on KLM and Air France

Blane Bachelor is a journalist and editor specialising in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favourite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history.

Read more
Laura Ratliff

Laura Ratliff

Expert on Virgin Atlantic

Laura Ratliff is a New York-based writer and editor. She lives in downtown Brooklyn with her husband and their beloved dogs. Originally from Texas, she now considers New York City her home. She typically spends more than 200,000 miles on a plane each year and stays in plenty of hotels.

Read more

Key details for Ko Samui to London Heathrow Airport flights

Low season

November

Cheapest flight

£274
Most popular time to fly (12% more expensive on average)
Flights from Ko Samui to London Heathrow Airport

When to book flights from Ko Samui to Heathrow

Are your dates flexible? Find out the best times to travel from Ko Samui to Heathrow 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 Heathrow Airport flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

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

    Flights from Ko Samui to London Heathrow Airport usually depart from Ko Samui (USM) and arrive at London Heathrow (LHR).

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

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

    • Economy class
    • Premium Economy Class
    • Business Class

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

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

    • Bangkok Suvarnabhumi (BKK) – 96% of one-stop connections
    • Singapore Changi (SIN) – 4% of one-stop connections
    Together, these airports account for 100% of one-stop bookings on this route.

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

    Yes. Being flexible with your travel dates can save you up to 33% on the Ko Samui to London Heathrow Airport route. Monday is the cheapest departure day at £962 return on average, while Friday is the most expensive at £1,422, a difference of £459. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in London Heathrow Airport?

    Some of the most popular sights in London Heathrow Airport are London Victoria Station, London Euston Railway Station, and Hyde Park. These are among the most viewed places in London Heathrow Airport on KAYAK.

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

    A direct flight from Ko Samui to London Heathrow Airport takes 0h 00m, covering 6,144 miles.

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

    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.

  • Have flight prices from Ko Samui to London Heathrow Airport 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 £673 to £1,665. That means the highest observed fare was about 2x higher than the lowest one.

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

    One-way fares from Ko Samui to London Heathrow Airport are currently lower than usual. Average one-way flight prices are about £326, which is 37% below the typical average for this route.

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

    Flying via Bangkok Suvarnabhumi (BKK) gives the shortest average 1-stop total travel time of 16h 02m, compared to 17h 59m via Singapore Changi (SIN).

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

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

  • Which car hire options are available at London Heathrow Airport (LHR)?

    London Heathrow Airport (LHR) hosts 5 major car hire companies, with daily rates starting from around £5 for economy cars. Top options include:
    • GREEN MOTION
    • DRIVALIA
    • Europcar
    • Alamo
    • Hertz

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

    Return flights from Ko Samui to London Heathrow Airport range from £939 to £1,105, with an average of £1,021 over the past 12 months. Anything below £939 counts as a good deal.

Your guide to booking Ko Samui to London Heathrow Airport 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 £962 – about £459 less than Friday (32% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Ko Samui to London Heathrow Airport trip for September. Fares historically average £885 return in that month – typically £291 less than the most expensive month, which is April (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to London Heathrow Airport.
    - Hilton London Heathrow Airport

More options for your flight from Ko Samui to Heathrow

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

Car hire in London
Hotels in London
Holidays in London