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£323 Cheap Flights from Samui Intl. Airport (USM) to London (LHR)

View £323 flight on Tue, 13 Oct 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 £323 for one-way flights and £744 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Bangkok Airways
Thu, 17 Sept - Sun, 20 Sept
USM
Koh Samui
LHR
London
£744 Return, found 1 day ago
£744
Return
found 1 day ago
Select Bangkok Airways flight, departing Thu, 17 Sept from Koh Samui to London, returning Sun, 20 Sept, priced at £744 found 1 day ago
Bangkok Airways
Thu, 19 Nov - Mon, 23 Nov
USM
Koh Samui
LHR
London
£780 Return, found 4 days ago
£780
Return
found 4 days ago
Select Bangkok Airways flight, departing Thu, 19 Nov from Koh Samui to London, returning Mon, 23 Nov, priced at £780 found 4 days ago
Bangkok Airways
Thu, 17 Sept - Sun, 20 Sept
USM
Koh Samui
LHR
London
£794 Return, found 1 day ago
£794
Return
found 1 day ago
Select Bangkok Airways flight, departing Thu, 17 Sept from Koh Samui to London, returning Sun, 20 Sept, priced at £794 found 1 day ago
Bangkok Airways
Sat, 14 Nov - Sat, 21 Nov
USM
Koh Samui
LHR
London
£795 Return, found 4 days ago
£795
Return
found 4 days ago
Select Bangkok Airways flight, departing Sat, 14 Nov from Koh Samui to London, returning Sat, 21 Nov, priced at £795 found 4 days ago
Bangkok Airways
Thu, 19 Nov - Mon, 23 Nov
USM
Koh Samui
LHR
London
£797 Return, found 4 days ago
£797
Return
found 4 days ago
Select Bangkok Airways flight, departing Thu, 19 Nov from Koh Samui to London, returning Mon, 23 Nov, priced at £797 found 4 days ago
Emirates
Tue, 16 Feb - Wed, 3 Mar
USM
Koh Samui
LHR
London
£919 Return, found 4 days ago
£919
Return
found 4 days ago
Select Emirates flight, departing Tue, 16 Feb from Koh Samui to London, returning Wed, 3 Mar, priced at £919 found 4 days ago
Lufthansa
Thu, 29 Oct - Sat, 31 Oct
USM
Koh Samui
LHR
London
£938 Return, found 5 days ago
£938
Return
found 5 days ago
Select Lufthansa flight, departing Thu, 29 Oct from Koh Samui to London, returning Sat, 31 Oct, priced at £938 found 5 days ago
Air France
Thu, 19 Nov - Mon, 23 Nov
USM
Koh Samui
LHR
London
£939 Return, found 4 days ago
£939
Return
found 4 days ago
Select Air France flight, departing Thu, 19 Nov from Koh Samui to London, returning Mon, 23 Nov, priced at £939 found 4 days ago
Qatar Airways
Sun, 12 Jul - Tue, 1 Sept
USM
Koh Samui
LHR
London
£952 Return, found 1 day ago
£952
Return
found 1 day ago
Select Qatar Airways flight, departing Sun, 12 Jul from Koh Samui to London, returning Tue, 1 Sept, priced at £952 found 1 day ago
Swiss International Air Lines
Mon, 24 May - Thu, 3 Jun
USM
Koh Samui
LHR
London
£960 Return, found 4 hours ago
£960
Return
found 4 hours ago
Select Swiss International Air Lines flight, departing Mon, 24 May from Koh Samui to London, returning Thu, 3 Jun, priced at £960 found 4 hours 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 £1,073
LGW
Gatwick
Average driving time to city centre52 min
Flights from £1,073
Select flight to London City LCY. Closest option available. Average driving time to city centre is 21 minutes. Flights from £1,543
LCY
London City
Closest
Average driving time to city centre21 min
Flights from £1,543

Frequently asked questions

How much does a flight from Samui Intl. Airport (USM) to London (LHR-Heathrow) cost?
You can find cheap one-way flights from £323 and cheap return flights from £744 USM to LHR with Expedia. One-way flights typically cost between £517 and £1839, and return flights often range between £1029 and £3118. 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 USM to LHR ticket fares go up or down.
What is the cheapest month to fly from Samui Intl. Airport (USM) to London (LHR-Heathrow)?
The cheapest months to fly from USM to LHR are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Samui Intl. Airport (USM) to London (LHR-Heathrow)?
Enter USM to LHR and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Samui Intl. Airport (USM) to London (LHR-Heathrow)?
Scoot is one of the cheapest airlines offering connecting return flights from Samui Intl. Airport (USM) to London (LHR-Heathrow), with tickets starting from around £1105 for flights that can be booked for departure within the next year. These flights typically include a layover in Changi (SIN). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
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 around 32 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 around 6:00 AM. This service is operated by Bangkok Airways and Air France. This is a seasonal service active in April. An early departure like this can help you make the most of 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 typically find the most flights from Samui Intl. Airport (USM) to London Heathrow (LHR) on a Tuesday, with around 55 flights available. This gives you a good selection of options for your journey. Major airlines on this route include Bangkok Airways and Scoot. Flight schedules are fairly consistent throughout the week, so you'll have plenty of options no matter which day you choose to fly.
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. Many travellers prefer this time because it allows for a relaxed start to the day before heading to the airport. Bangkok Airways offers flights during this window.
How long does it take to fly from Samui Intl. Airport (USM) to London (LHR-Heathrow)?
There are no nonstop flights from Samui Intl. Airport (USM) to London (LHR-Heathrow). The shortest flights typically involve one stop and take around 19 hours 18 minutes. Flights with two or more stops usually take longer, averaging about 21 hours 30 minutes. The distance covered on this route is approximately 9,896 kilometers. Keep in mind that actual travel times can vary due to factors like layover duration, routing, and weather conditions.
Can you fly business or first class from Samui Intl. Airport (USM) to London (LHR-Heathrow)?
You can fly business class from Samui Intl. Airport (USM) to London (LHR). You can fly business class with Bangkok Airways.
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 (LHR) from Samui Intl. Airport (USM)?
If you're planning to travel to London from USM, you can fly directly into Heathrow (LHR). Some flights may connect through major hubs like Suvarnabhumi Intl. (BKK), Phuket Intl. (HKT), or 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
Air France, Austrian Airlines, British Airways, Cathay Pacific, EVA Airways, Emirates, Etihad Airways, Finnair, KLM, Lufthansa, Qatar Airways, Singapore Airlines, Swiss International Air Lines, Thai Airways International, Turkish Airlines
Return price
£743
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 £744 and range up to £960.  

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.  

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

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