£397 Cheap Flights from Samui Intl. Airport (USM) to London (LHR)

View £397 flight on Wed, 26 Nov 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at £397 for one-way flights and £698 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Swiss International Air Lines
Tue, 10 Jun - Tue, 17 Jun
USM
Koh Samui
LHR
London
£698 Return, found 3 days ago
£698
Return
found 3 days ago
Select Swiss International Air Lines flight, departing Tue, 10 Jun from Koh Samui to London, returning Tue, 17 Jun, priced at £698 found 3 days ago
Swiss International Air Lines
Thu, 15 May - Thu, 22 May
USM
Koh Samui
LHR
London
£722 Return, found 17 hours ago
£722
Return
found 17 hours ago
Select Swiss International Air Lines flight, departing Thu, 15 May from Koh Samui to London, returning Thu, 22 May, priced at £722 found 17 hours ago
Austrian Airlines
Wed, 11 Jun - Wed, 25 Jun
USM
Koh Samui
LHR
London
£723 Return, found 17 hours ago
£723
Return
found 17 hours ago
Select Austrian Airlines flight, departing Wed, 11 Jun from Koh Samui to London, returning Wed, 25 Jun, priced at £723 found 17 hours ago
Austrian Airlines
Wed, 11 Jun - Wed, 25 Jun
USM
Koh Samui
LHR
London
£724 Return, found 17 hours ago
£724
Return
found 17 hours ago
Select Austrian Airlines flight, departing Wed, 11 Jun from Koh Samui to London, returning Wed, 25 Jun, priced at £724 found 17 hours ago
Austrian Airlines
Mon, 9 Jun - Fri, 13 Jun
USM
Koh Samui
LHR
London
£725 Return, found 5 days ago
£725
Return
found 5 days ago
Select Austrian Airlines flight, departing Mon, 9 Jun from Koh Samui to London, returning Fri, 13 Jun, priced at £725 found 5 days ago
Swiss International Air Lines
Mon, 9 Jun - Fri, 13 Jun
USM
Koh Samui
LHR
London
£728 Return, found 5 days ago
£728
Return
found 5 days ago
Select Swiss International Air Lines flight, departing Mon, 9 Jun from Koh Samui to London, returning Fri, 13 Jun, priced at £728 found 5 days ago
Lufthansa
Sat, 21 Jun - Thu, 26 Jun
USM
Koh Samui
LHR
London
£831 Return, found 1 day ago
£831
Return
found 1 day ago
Select Lufthansa flight, departing Sat, 21 Jun from Koh Samui to London, returning Thu, 26 Jun, priced at £831 found 1 day ago
Qatar Airways
Thu, 15 May - Thu, 22 May
USM
Koh Samui
LHR
London
£870 Return, found 17 hours ago
£870
Return
found 17 hours ago
Select Qatar Airways flight, departing Thu, 15 May from Koh Samui to London, returning Thu, 22 May, priced at £870 found 17 hours ago
Gulf Air
Mon, 9 Jun - Fri, 13 Jun
USM
Koh Samui
LHR
London
£879 Return, found 5 days ago
£879
Return
found 5 days ago
Select Gulf Air flight, departing Mon, 9 Jun from Koh Samui to London, returning Fri, 13 Jun, priced at £879 found 5 days ago
EVA Airways
Wed, 11 Jun - Thu, 3 Jul
USM
Koh Samui
LHR
London
£893 Return, found 4 hours ago
£893
Return
found 4 hours ago
Select EVA Airways flight, departing Wed, 11 Jun from Koh Samui to London, returning Thu, 3 Jul, priced at £893 found 4 hours 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, Emirates, Etihad Airways, Gulf Air, KLM, Qantas Airways, Qatar Airways, Swiss International Air Lines, Thai Airways International, Turkish Airlines
Return price
£698
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 £698 and range up to £893.  

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 June, 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 £698. 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.

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