$458 Cheap Flights from Samui Intl. Airport (USM) to London (LHR)

View $458 flight on Wed, Dec 24, 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 to London (USM-LHR)

Prices were available within the past 7 days and start at $458 for one-way flights and $961 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Tue, Nov 11 - Sun, Nov 16
USM
Koh Samui
LHR
London
$961 Roundtrip, found 11 hours ago
$961
Roundtrip
found 11 hours ago
Select Lufthansa flight, departing Tue, Nov 11 from Koh Samui to London, returning Sun, Nov 16, priced at $961 found 11 hours ago
Swiss International Air Lines
Tue, Nov 11 - Sun, Nov 16
USM
Koh Samui
LHR
London
$1,009 Roundtrip, found 11 hours ago
$1,009
Roundtrip
found 11 hours ago
Select Swiss International Air Lines flight, departing Tue, Nov 11 from Koh Samui to London, returning Sun, Nov 16, priced at $1,009 found 11 hours ago
Austrian Airlines
Tue, Nov 11 - Sun, Nov 16
USM
Koh Samui
LHR
London
$1,011 Roundtrip, found 11 hours ago
$1,011
Roundtrip
found 11 hours ago
Select Austrian Airlines flight, departing Tue, Nov 11 from Koh Samui to London, returning Sun, Nov 16, priced at $1,011 found 11 hours ago
Lufthansa
Tue, Nov 11 - Sun, Nov 16
USM
Koh Samui
LHR
London
$1,022 Roundtrip, found 11 hours ago
$1,022
Roundtrip
found 11 hours ago
Select Lufthansa flight, departing Tue, Nov 11 from Koh Samui to London, returning Sun, Nov 16, priced at $1,022 found 11 hours ago
Swiss International Air Lines
Tue, Nov 11 - Sun, Nov 16
USM
Koh Samui
LHR
London
$1,025 Roundtrip, found 11 hours ago
$1,025
Roundtrip
found 11 hours ago
Select Swiss International Air Lines flight, departing Tue, Nov 11 from Koh Samui to London, returning Sun, Nov 16, priced at $1,025 found 11 hours ago
Austrian Airlines
Tue, Nov 11 - Sun, Nov 16
USM
Koh Samui
LHR
London
$1,079 Roundtrip, found 11 hours ago
$1,079
Roundtrip
found 11 hours ago
Select Austrian Airlines flight, departing Tue, Nov 11 from Koh Samui to London, returning Sun, Nov 16, priced at $1,079 found 11 hours ago
Lufthansa
Tue, Nov 11 - Sun, Nov 16
USM
Koh Samui
LHR
London
$1,080 Roundtrip, found 11 hours ago
$1,080
Roundtrip
found 11 hours ago
Select Lufthansa flight, departing Tue, Nov 11 from Koh Samui to London, returning Sun, Nov 16, priced at $1,080 found 11 hours ago
Lufthansa
Tue, Nov 11 - Sun, Nov 16
USM
Koh Samui
LHR
London
$1,083 Roundtrip, found 11 hours ago
$1,083
Roundtrip
found 11 hours ago
Select Lufthansa flight, departing Tue, Nov 11 from Koh Samui to London, returning Sun, Nov 16, priced at $1,083 found 11 hours ago
Emirates
Tue, Nov 11 - Sun, Nov 16
USM
Koh Samui
LHR
London
$1,140 Roundtrip, found 11 hours ago
$1,140
Roundtrip
found 11 hours ago
Select Emirates flight, departing Tue, Nov 11 from Koh Samui to London, returning Sun, Nov 16, priced at $1,140 found 11 hours ago
Singapore Airlines
Tue, Nov 11 - Sun, Nov 16
USM
Koh Samui
LHR
London
$1,145 Roundtrip, found 11 hours ago
$1,145
Roundtrip
found 11 hours ago
Select Singapore Airlines flight, departing Tue, Nov 11 from Koh Samui to London, returning Sun, Nov 16, priced at $1,145 found 11 hours ago

Alternative airports near London

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

Select flight to Heathrow LHR. Cheapest option available. Average driving time to city center is 28 minutes. Flights from $961
LHR
Heathrow
Cheapest
Average driving time to city center28 min
Flights from $961

Frequently asked questions

How much does a flight from Ko Samui Airport (USM) to Heathrow Airport (LHR) cost?
Get a cheap one-way flight from $458 or cheap return flight from $961 from Ko Samui Airport (USM) to Heathrow Airport (LHR) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Ko Samui Airport (USM) to Heathrow Airport (LHR)?
The cheapest month to fly from USM to LHR is November, when demand is low. Off-peak months are often when airlines offer better prices between these airports.
What is the cheapest airline that flies from Ko Samui Airport (USM) to Heathrow Airport (LHR)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from USM to LHR. Then, sort your results by "Price (lowest to highest)" to snag a great deal.
How many flights per day from Ko Samui Airport (USM) to Heathrow Airport (LHR)?
Nonstop flights from Ko Samui Airport (USM) to Heathrow Airport (LHR) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from USM to LHR?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Ko Samui Airport (USM) to Heathrow Airport (LHR)?
Opt for a flight from Ko Samui Airport (USM) to Heathrow Airport (LHR) that takes off before 3 PM to reduce the likelihood of delays and cancellations. Departures after this hour 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 Ko Samui Airport (USM) to Heathrow Airport (LHR) last-minute?
Booking your plane ticket from USM to LHR right before your getaway is generally more expensive. However, if there's some wiggle room with your travel dates and times, you could land a cheap last-minute fare.
Is it cheaper to book an USM to LHR flight and hotel package?
Compared with arranging flights and hotels separately, booking an USM to LHR flight and hotel package with Expedia could result in significant savings. Better still, having it all in one place will take the hassle out of travel planning. Just secure your flights and select from our extensive range of hotels, then personalize your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Ko Samui Airport (USM) to Heathrow Airport (LHR)?
Typically, you can reschedule or cancel your USM to LHR flight. However, there may be additional charges, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you'd like more details, go to our Customer Service portal.

Travel information

Origin airport
Samui Intl. Airport
Destination airport
Heathrow
Roundtrip price
$960
Distance
6148 mi

Book with confidence

Samui Intl. Airport to London Flights

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

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 Samui Intl. Airport to London are during the month of November. You can find some of the cheapest flights from Samui Intl. Airport to London with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Samui Intl. Airport to London: 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 Samui Intl. Airport to London

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 Samui Intl. Airport to London in 2025. You can also book with separate airlines for your outbound and return journeys, from $458 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 Samui Intl. Airport to London 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 Samui Intl. Airport to London 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.

 

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