£387 Cheap Flights from Samui Intl. Airport (USM) to London (LHR)

View £387 flight on Wed, 17 Jun 2026Opens 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 £387 for one-way flights and £788 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Bangkok Airways
Tue, 16 Jun - Fri, 19 Jun
USM
Koh Samui
LHR
London
£788 Return, found 2 days ago
£788
Return
found 2 days ago
Select Bangkok Airways flight, departing Tue, 16 Jun from Koh Samui to London, returning Fri, 19 Jun, priced at £788 found 2 days ago
Oman Air
Sun, 31 May - Mon, 15 Jun
USM
Koh Samui
LHR
London
£793 Return, found 2 days ago
£793
Return
found 2 days ago
Select Oman Air flight, departing Sun, 31 May from Koh Samui to London, returning Mon, 15 Jun, priced at £793 found 2 days ago
Bangkok Airways
Sun, 10 May - Mon, 11 May
USM
Koh Samui
LHR
London
£797 Return, found 5 days ago
£797
Return
found 5 days ago
Select Bangkok Airways flight, departing Sun, 10 May from Koh Samui to London, returning Mon, 11 May, priced at £797 found 5 days ago
Oman Air
Thu, 14 May - Thu, 18 Jun
USM
Koh Samui
LHR
London
£799 Return, found 1 day ago
£799
Return
found 1 day ago
Select Oman Air flight, departing Thu, 14 May from Koh Samui to London, returning Thu, 18 Jun, priced at £799 found 1 day ago
Oman Air
Sun, 31 May - Sun, 14 Jun
USM
Koh Samui
LHR
London
£800 Return, found 2 days ago
£800
Return
found 2 days ago
Select Oman Air flight, departing Sun, 31 May from Koh Samui to London, returning Sun, 14 Jun, priced at £800 found 2 days ago
Qatar Airways
Sun, 31 May - Sun, 14 Jun
USM
Koh Samui
LHR
London
£855 Return, found 2 days ago
£855
Return
found 2 days ago
Select Qatar Airways flight, departing Sun, 31 May from Koh Samui to London, returning Sun, 14 Jun, priced at £855 found 2 days ago
Emirates
Mon, 1 Feb - Mon, 8 Feb
USM
Koh Samui
LHR
London
£910 Return, found 4 days ago
£910
Return
found 4 days ago
Select Emirates flight, departing Mon, 1 Feb from Koh Samui to London, returning Mon, 8 Feb, priced at £910 found 4 days ago
Air France
Fri, 13 Nov - Wed, 25 Nov
USM
Koh Samui
LHR
London
£974 Return, found 4 days ago
£974
Return
found 4 days ago
Select Air France flight, departing Fri, 13 Nov from Koh Samui to London, returning Wed, 25 Nov, priced at £974 found 4 days ago
Etihad Airways
Mon, 8 Jun - Mon, 22 Jun
USM
Koh Samui
LHR
London
£983 Return, found 4 days ago
£983
Return
found 4 days ago
Select Etihad Airways flight, departing Mon, 8 Jun from Koh Samui to London, returning Mon, 22 Jun, priced at £983 found 4 days ago
Finnair
Fri, 13 Nov - Wed, 25 Nov
USM
Koh Samui
LHR
London
£1,004 Return, found 4 days ago
£1,004
Return
found 4 days ago
Select Finnair flight, departing Fri, 13 Nov from Koh Samui to London, returning Wed, 25 Nov, priced at £1,004 found 4 days ago

Alternative airports near London

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Gatwick LGW. Average driving time to city centre is 52 minutes. Flights from £966
LGW
Gatwick
Average driving time to city centre52 min
Flights from £966

Frequently asked questions

How much does a flight from Samui Intl. Airport (USM) to London (LHR-Heathrow) cost?
One-way flights typically cost between £485 and £2,013 and return flights often range between £1,029 and £3,068. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
How do I find cheap flights from Samui Intl. Airport (USM) to London (LHR-Heathrow)?
To find a cheap flight from Samui Intl. Airport (USM) to London (LHR-Heathrow), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Samui Intl. Airport (USM) to London (LHR-Heathrow)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Samui Intl. Airport (USM) to London (LHR-Heathrow)?
There are approximately 34 connecting flights per day from Samui Intl. Airport (USM) to London (LHR-Heathrow). Some common connection points include Suvarnabhumi Intl. (BKK), Changi (SIN), and Phuket Intl. (HKT).
What is the earliest flight from Samui Intl. Airport (USM) to London (LHR-Heathrow)?
The earliest flight from Samui Intl. Airport (USM) to London (LHR-Heathrow) typically departs at approximately 6:00 AM local time. This service is operated by PG and AF, and it's a seasonal service active in April. An early departure like this can help you maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Samui Intl. Airport (USM) to London (LHR-Heathrow)?
You'll find the most flights from Samui Intl. Airport (USM) to London (LHR-Heathrow) on a Sunday, with around 61 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include PG, TR, and SQ. Looking at the week, Sunday offers notably more flight options compared to other days.
What are the most popular departure times for flights from Samui Intl. Airport (USM) to London (LHR-Heathrow)?
The most popular departure times for flights from Samui Intl. Airport (USM) to London (LHR-Heathrow) are in the afternoon, from 3pm to 6pm. About 32% of passengers prefer this time. Many major carriers, including Bangkok Airways, Qatar Airways and Emirates, offer flights during this window. This timing works well because it allows you to enjoy your morning before heading to the airport, and you'll arrive in London ready to start your day.
How long does it take to fly from Samui Intl. Airport (USM) to London (LHR-Heathrow)?
Flights from USM to LHR with one stop typically take around 17 hours 20 minutes, covering approximately 6,149 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Samui Intl. Airport (USM) to London (LHR-Heathrow)?
Select the "Business class" and "First class" filters when looking for USM to LHR flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Samui Intl. Airport (USM) to London (LHR-Heathrow) flight with Expedia?
It's easy to earn miles on a Samui Intl. Airport (USM) to London (LHR-Heathrow) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for London from USM (USM)?
When traveling from USM (USM) to London, you can fly into Stansted (STN), Heathrow (LHR) and Gatwick (LGW). Some flights may connect through major hubs like Suvarnabhumi Intl. (BKK), Phuket Intl. (HKT), Changi (SIN) before reaching London. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Samui Intl. Airport (USM) to London (LHR-Heathrow) at the last minute?
Typically, booking a last minute flight from Samui Intl. Airport (USM) to London (LHR-Heathrow) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Samui Intl. Airport (USM) to London (LHR-Heathrow) flight and hotel package?
Securing a Samui Intl. Airport (USM) to London (LHR-Heathrow) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Samui Intl. Airport (USM) to London (LHR-Heathrow)?
If you booked your Samui Intl. Airport (USM) to London (LHR-Heathrow) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Samui Intl. Airport
Destination airport
Heathrow
Airlines serving
Austrian Airlines, British Airways, Cathay Pacific, EVA Airways, Emirates, Etihad Airways, KLM, Lufthansa, Oman Air, Qatar Airways, Singapore Airlines, Swiss International Air Lines, Thai Airways International, Turkish Airlines
Return price
£787
Distance
9836 km

Book with confidence

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 £788 and range up to £1,004.  

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.  

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

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