£377 Cheap Flights from Samui Intl. Airport (USM) to London (LHR)

View £377 flight on Mon, 22 Sep 2025Opens in a new window

Popular airlines from Samui Intl. Airport (USM) to Heathrow Airport (LHR)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 25% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from Samui Intl. Airport (USM) to London (LHR)

Prices were available within the past 7 days and start at £377 for one-way flights and £826 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Bangkok Airways
Sun, 14 Sep - Sun, 28 Sep
USM
Koh Samui
LHR
London
£826 Return, found 6 days ago
£826
Return
found 6 days ago
Select Bangkok Airways flight, departing Sun, 14 Sep from Koh Samui to London, returning Sun, 28 Sep, priced at £826 found 6 days ago
Gulf Air
Mon, 22 Sep - Sat, 4 Oct
USM
Koh Samui
LHR
London
£827 Return, found 2 days ago
£827
Return
found 2 days ago
Select Gulf Air flight, departing Mon, 22 Sep from Koh Samui to London, returning Sat, 4 Oct, priced at £827 found 2 days ago
Bangkok Airways
Fri, 17 Oct - Fri, 31 Oct
USM
Koh Samui
LHR
London
£828 Return, found 7 hours ago
£828
Return
found 7 hours ago
Select Bangkok Airways flight, departing Fri, 17 Oct from Koh Samui to London, returning Fri, 31 Oct, priced at £828 found 7 hours ago
Austrian Airlines
Thu, 11 Sep - Sat, 20 Sep
USM
Koh Samui
LHR
London
£839 Return, found 2 days ago
£839
Return
found 2 days ago
Select Austrian Airlines flight, departing Thu, 11 Sep from Koh Samui to London, returning Sat, 20 Sep, priced at £839 found 2 days ago
Austrian Airlines
Thu, 11 Sep - Thu, 18 Sep
USM
Koh Samui
LHR
London
£843 Return, found 2 days ago
£843
Return
found 2 days ago
Select Austrian Airlines flight, departing Thu, 11 Sep from Koh Samui to London, returning Thu, 18 Sep, priced at £843 found 2 days ago
Bangkok Airways
Mon, 20 Oct - Thu, 6 Nov
USM
Koh Samui
LHR
London
£843 Return, found 5 days ago
£843
Return
found 5 days ago
Select Bangkok Airways flight, departing Mon, 20 Oct from Koh Samui to London, returning Thu, 6 Nov, priced at £843 found 5 days ago
Bangkok Airways
Tue, 21 Oct - Wed, 5 Nov
USM
Koh Samui
LHR
London
£844 Return, found 5 days ago
£844
Return
found 5 days ago
Select Bangkok Airways flight, departing Tue, 21 Oct from Koh Samui to London, returning Wed, 5 Nov, priced at £844 found 5 days ago
Swiss International Air Lines
Tue, 23 Dec - Tue, 10 Feb
USM
Koh Samui
LHR
London
£868 Return, found 1 day ago
£868
Return
found 1 day ago
Select Swiss International Air Lines flight, departing Tue, 23 Dec from Koh Samui to London, returning Tue, 10 Feb, priced at £868 found 1 day ago
Qatar Airways
Mon, 13 Oct - Mon, 27 Oct
USM
Koh Samui
LHR
London
£868 Return, found 18 hours ago
£868
Return
found 18 hours ago
Select Qatar Airways flight, departing Mon, 13 Oct from Koh Samui to London, returning Mon, 27 Oct, priced at £868 found 18 hours ago
KLM
Mon, 20 Oct - Wed, 5 Nov
USM
Koh Samui
LHR
London
£880 Return, found 5 days ago
£880
Return
found 5 days ago
Select KLM flight, departing Mon, 20 Oct from Koh Samui to London, returning Wed, 5 Nov, priced at £880 found 5 days ago
Flight from Samui Intl. Airport to London route information
Origin airport
Samui Intl. Airport
Destination airport
Heathrow
Airlines serving
Air France, Austrian Airlines, British Airways, Cathay Pacific, EVA Airways, Etihad Airways, Finnair, KLM, Oman Air, Qatar Airways, Singapore Airlines, Swiss International Air Lines, Thai Airways International, Turkish Airlines
Return price
£826
Distance
9836 km

Compare flights from Samui Intl. Airport to London easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Samui Intl. Airport to London. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Heathrow in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Samui Intl. Airport to Heathrow.  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Samui Intl. Airport (USM) to Heathrow (LHR)

The easiest way to view the best deals on flights from Samui Intl. Airport to London today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Samui Intl. Airport to Heathrow start at just £826 and range up to £880.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Samui Intl. Airport and London
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Samui Intl. Airport to London flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Samui Intl. Airport to Heathrow for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Frequently asked questions

How much is a flight from USM to LHR?
Based on fares quoted within the last 7 days on Expedia for flights departing within the next year, round-trip journeys from Ko Samui Airport to LHR start from £826. Make your booking ASAP to score the best price for your adventure. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Samui Airport to London Heathrow?
We understand that circumstances change unexpectedly, so we've made it as easy as possible for you to cancel your trip online. Just head to the Customer Service Portal and follow the instructions.
How do I find cheap flights from USM to Heathrow Airport (LHR) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for USM to LHR flights, you'll see a "no change fees" filter for you to select.
How far is the flight from USM to LHR?
The distance is around 9,900 kilometres, so pack your carry-on luggage with everything you need to make the long journey comfortable. Not sure what to take on board your Koh Samui to Hounslow flight? A neck pillow, earplugs and a sleep mask are among the essentials.
Which airlines fly direct from USM to London Heathrow?
Unfortunately, there aren't any airlines that directly fly between Ko Samui Airport and LHR. You'll need to book a flight with at least one stop.
Are Ko Samui Airport to LHR flight tickets cheaper when they're purchased at the last minute?
Late planners can occasionally nab a bargain, with some super cheap airfares from USM to LHR appearing a few weeks prior to the departure date. If you'd rather book ahead of time, Expedia compares and updates the best flight deals regularly — as early as a year in advance in some cases. It depends on the carrier though, as not all airlines quote prices so far in advance.

Explore a world of travel with Expedia

London Airports

London

*Available to Expedia members.