$546 Cheap Flights from London (LHR) to Samui Intl. Airport (USM)

View $546 flight on Sun, Feb 22, 2026Opens in a new window

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

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

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

Prices were available within the past 7 days and start at $546 for one-way flights and $872 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Wed, Mar 18 - Wed, Mar 25
LHR
London
USM
Koh Samui
$872 Roundtrip, found 5 days ago
$872
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Wed, Mar 18 from London to Koh Samui, returning Wed, Mar 25, priced at $872 found 5 days ago
Lufthansa
Sat, Apr 18 - Sat, May 9
LHR
London
USM
Koh Samui
$877 Roundtrip, found 1 day ago
$877
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Sat, Apr 18 from London to Koh Samui, returning Sat, May 9, priced at $877 found 1 day ago
Austrian Airlines
Fri, Jun 5 - Mon, Jun 15
LHR
London
USM
Koh Samui
$887 Roundtrip, found 4 days ago
$887
Roundtrip
found 4 days ago
Select Austrian Airlines flight, departing Fri, Jun 5 from London to Koh Samui, returning Mon, Jun 15, priced at $887 found 4 days ago
Austrian Airlines
Fri, Jun 5 - Mon, Jun 15
LHR
London
USM
Koh Samui
$894 Roundtrip, found 4 days ago
$894
Roundtrip
found 4 days ago
Select Austrian Airlines flight, departing Fri, Jun 5 from London to Koh Samui, returning Mon, Jun 15, priced at $894 found 4 days ago
Swiss International Air Lines
Fri, Jun 5 - Mon, Jun 15
LHR
London
USM
Koh Samui
$897 Roundtrip, found 4 days ago
$897
Roundtrip
found 4 days ago
Select Swiss International Air Lines flight, departing Fri, Jun 5 from London to Koh Samui, returning Mon, Jun 15, priced at $897 found 4 days ago
Lufthansa
Sat, Mar 14 - Wed, Mar 25
LHR
London
USM
Koh Samui
$900 Roundtrip, found 4 days ago
$900
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Sat, Mar 14 from London to Koh Samui, returning Wed, Mar 25, priced at $900 found 4 days ago
Etihad Airways
Tue, Nov 18 - Tue, Dec 2
LHR
London
USM
Koh Samui
$914 Roundtrip, found 3 days ago
$914
Roundtrip
found 3 days ago
Select Etihad Airways flight, departing Tue, Nov 18 from London to Koh Samui, returning Tue, Dec 2, priced at $914 found 3 days ago
Austrian Airlines
Wed, Mar 18 - Wed, Mar 25
LHR
London
USM
Koh Samui
$938 Roundtrip, found 5 days ago
$938
Roundtrip
found 5 days ago
Select Austrian Airlines flight, departing Wed, Mar 18 from London to Koh Samui, returning Wed, Mar 25, priced at $938 found 5 days ago
KLM
Wed, Nov 12 - Tue, Nov 25
LHR
London
USM
Koh Samui
$1,013 Roundtrip, found 2 days ago
$1,013
Roundtrip
found 2 days ago
Select KLM flight, departing Wed, Nov 12 from London to Koh Samui, returning Tue, Nov 25, priced at $1,013 found 2 days ago
Air France
Mon, Jan 26 - Mon, Mar 2
LHR
London
USM
Koh Samui
$1,026 Roundtrip, found 3 days ago
$1,026
Roundtrip
found 3 days ago
Select Air France flight, departing Mon, Jan 26 from London to Koh Samui, returning Mon, Mar 2, priced at $1,026 found 3 days ago

Alternative airports near Koh Samui

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

Select flight to Samui Intl. Airport USM. Cheapest and Closest option available. Average driving time to city center is 31 minutes. Flights from $1,057
USM
Samui Intl. Airport
CheapestClosest
Average driving time to city center31 min
Flights from $1,057

Frequently asked questions

How much does a flight from Heathrow Airport (LHR) to Ko Samui Airport (USM) cost?
Grab a cheap one-way flight from $546 or cheap return flight from $872 from Heathrow Airport (LHR) to Ko Samui Airport (USM) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Heathrow Airport (LHR) to Ko Samui Airport (USM)?
The cheapest month to fly from LHR to USM is March, when there's less demand. Off-peak months are often when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Heathrow Airport (LHR) to Ko Samui Airport (USM)?
To find the cheapest airline flying from LHR to USM, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Heathrow Airport (LHR) to Ko Samui Airport (USM)?
There are no daily direct flights available from Heathrow Airport (LHR) to Ko Samui Airport (USM). But you can opt for flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from LHR to USM?
Typically you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can vary depending on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Heathrow Airport (LHR) to Ko Samui Airport (USM)?
Choose a flight from Heathrow Airport (LHR) to Ko Samui Airport (USM) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures later than this have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Heathrow Airport (LHR) to Ko Samui Airport (USM) last-minute?
Holding off until just before your departure to book a ticket from LHR to USM generally means paying more. While you might find some last-minute discounts, there's no guarantee. Keep your travel plans flexible to maximize your chances of scoring a bargain.
Is it cheaper to book a LHR to USM flight and hotel package?
Compared with arranging hotels and flights separately, booking a LHR to USM flight and hotel package with Expedia could result in significant savings. Better still, having everything in one convenient place will take the stress out of travel planning. Simply pick your flights and select from our extensive range of hotels, then personalize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Heathrow Airport (LHR) to Ko Samui Airport (USM)?
Typically, you can reschedule or cancel your LHR to USM flight. However, there may be additional fees, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline's fees and guidelines on flight changes, or if you need more information, go to our Customer Service portal.

Travel information

Origin airport
Heathrow
Destination airport
Samui Intl. Airport
Airlines serving
Air France, Austrian Airlines, British Airways, Cathay Pacific, Emirates, Etihad Airways, Gulf Air, KLM, Lufthansa, Malaysia Airlines, Qatar Airways, Singapore Airlines, Swiss International Air Lines, Thai Airways International, Turkish Airlines
Roundtrip price
$872
Distance
6148 mi

Book with confidence

London to Samui Intl. Airport Flights

The cheapest times to fly from London to Samui Intl. Airport

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from London to Samui Intl. Airport are during the month of March. You can find some of the cheapest flights from London to Samui Intl. Airport with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from London to Samui Intl. Airport

Sunday is one of the best days to book for cheap flights from London to Samui Intl. Airport: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from London to Samui Intl. Airport

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from London to Samui Intl. Airport in 2025. You can also book with separate airlines for your outbound and return journeys, from $546 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap London to Samui Intl. Airport flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your London to Samui Intl. Airport airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

London to Samui Intl. Airport Flights
*Available to One Key members.