CA $836 Cheap Flights from London (LHR) to Samui Intl. Airport (USM)

View CA $836 flight on Mon, Nov 10, 2025Opens 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 rewards
    Sign in

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

Prices were available within the past 7 days and start at CA $836 for one-way flights and CA $1,216 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Fri, Dec 5 - Tue, Dec 9
LHR
London
USM
Koh Samui
CA $1,216 Roundtrip, found 5 days ago
CA $1,216
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Fri, Dec 5 from London to Koh Samui, returning Tue, Dec 9, priced at CA $1,216 found 5 days ago
Lufthansa
Fri, Dec 5 - Mon, Dec 8
LHR
London
USM
Koh Samui
CA $1,229 Roundtrip, found 5 days ago
CA $1,229
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Fri, Dec 5 from London to Koh Samui, returning Mon, Dec 8, priced at CA $1,229 found 5 days ago
Lufthansa
Mon, Dec 8 - Tue, Dec 16
LHR
London
USM
Koh Samui
CA $1,247 Roundtrip, found 5 days ago
CA $1,247
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Mon, Dec 8 from London to Koh Samui, returning Tue, Dec 16, priced at CA $1,247 found 5 days ago
Austrian Airlines
Thu, Jun 11 - Thu, Jun 18
LHR
London
USM
Koh Samui
CA $1,269 Roundtrip, found 1 day ago
CA $1,269
Roundtrip
found 1 day ago
Select Austrian Airlines flight, departing Thu, Jun 11 from London to Koh Samui, returning Thu, Jun 18, priced at CA $1,269 found 1 day ago
Lufthansa
Fri, Dec 5 - Sun, Dec 14
LHR
London
USM
Koh Samui
CA $1,281 Roundtrip, found 5 days ago
CA $1,281
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Fri, Dec 5 from London to Koh Samui, returning Sun, Dec 14, priced at CA $1,281 found 5 days ago
Lufthansa
Thu, Jun 11 - Thu, Jun 18
LHR
London
USM
Koh Samui
CA $1,285 Roundtrip, found 1 day ago
CA $1,285
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Thu, Jun 11 from London to Koh Samui, returning Thu, Jun 18, priced at CA $1,285 found 1 day ago
Austrian Airlines
Tue, Sep 23 - Mon, Sep 29
LHR
London
USM
Koh Samui
CA $1,316 Roundtrip, found 5 days ago
CA $1,316
Roundtrip
found 5 days ago
Select Austrian Airlines flight, departing Tue, Sep 23 from London to Koh Samui, returning Mon, Sep 29, priced at CA $1,316 found 5 days ago
Swiss International Air Lines
Wed, Sep 24 - Wed, Oct 1
LHR
London
USM
Koh Samui
CA $1,402 Roundtrip, found 5 days ago
CA $1,402
Roundtrip
found 5 days ago
Select Swiss International Air Lines flight, departing Wed, Sep 24 from London to Koh Samui, returning Wed, Oct 1, priced at CA $1,402 found 5 days ago
Qatar Airways
Thu, Jun 11 - Thu, Jun 18
LHR
London
USM
Koh Samui
CA $1,489 Roundtrip, found 1 day ago
CA $1,489
Roundtrip
found 1 day ago
Select Qatar Airways flight, departing Thu, Jun 11 from London to Koh Samui, returning Thu, Jun 18, priced at CA $1,489 found 1 day ago
Etihad Airways
Sun, Sep 21 - Thu, Sep 25
LHR
London
USM
Koh Samui
CA $1,538 Roundtrip, found 5 days ago
CA $1,538
Roundtrip
found 5 days ago
Select Etihad Airways flight, departing Sun, Sep 21 from London to Koh Samui, returning Thu, Sep 25, priced at CA $1,538 found 5 days ago
Flight from London to Samui Intl. Airport (LHR - USM) route information
Origin airport
Heathrow
Destination airport
Samui Intl. Airport
Roundtrip price
CA $1,216
Distance
9836 km

London to Koh Samui Flights

The easy way to book your flights from London to Samui Intl. Airport 

With Expedia, it’s simple to find and book flights to Samui Intl. Airport from London whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Samui Intl. Airport, too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from London to Samui Intl. Airport today, tomorrow, or this week.  

 

Save dollars with cheap flights from Heathrow, LHR to Samui Intl. Airport, USM 

Sort your search results by price to find great deals on your flight from London to Samui Intl. Airport—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Samui Intl. Airport from London currently is just CA $1,216 rising to CA $1,538.  

Here are more money-saving tips: 

  • Fly in December when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Samui Intl. Airport  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Samui Intl. Airport from London 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Samui Intl. Airport with Expedia today.

Frequently asked questions

How much is a flight from LHR to USM?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price available for a round-trip flight from Heathrow Airport (LHR) to USM was CA $1,216. Cheap tickets don't last forever, so make sure you book yours today. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from LHR to Ko Samui Airport (USM)?
Every air carrier has different terms and conditions. If you decide to cancel your vacation, head to our Customer Service Portal.
How do I find cheap flights from London Heathrow to Ko Samui Airport that have flexible change policies?
Select our "No change fees" filter to find flexible ticketing options for your flight from London Heathrow to Ko Samui Airport (USM). This allows you to snag a good price ahead of time and still have the freedom to reschedule without any additional fees. Fare adjustments may apply if your new flight is more expensive.
How many hours is the flight from Heathrow Airport (LHR) to USM?
It takes an average of 12 hours and 39 minutes to jet from LHR to USM. If you're planning to catch up on lost sleep, bring a pillow, an eye mask and some earplugs.
How far is the flight from Heathrow Airport to USM?
You'll have 9,900 kilometres to cover on the long-haul Hounslow to Koh Samui route. Wear comfortable clothes and consider taking a pair of noise-cancelling headphones.
Which airlines fly direct from Heathrow Airport (LHR) to Ko Samui Airport?
You won't find any airlines flying directly between LHR and USM, so be prepared to make at least one stop on your journey. A layover can be a nice way to break up a trip!
Are London Heathrow to USM flight tickets cheaper when they're purchased at the last minute?
It is possible to pick up a great last-minute deal from LHR to USM, but there's no guarantee. As many airlines release prices up to a year in advance, it's worthwhile keeping an eye on fares early and being ready to book when you spot a good bargain. Expedia compares air carrier prices and updates flight deals regularly, so you can rest assured you're always getting the latest offers.

Explore a world of travel with Expedia

London nearby Airports

London

Gatwick to Samui Intl. Airport
CA $1,430.80
Stansted to Samui Intl. Airport
CA $1,988.10
*Available to Expedia members.