KLM Cheap Flights from London to Samui Intl. Airport

View €724 flight on Tue, 24 Mar 2026Opens in a new window
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Prices were available within the past 7 days and start at €724 for one-way flights and €911 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

KLM
Tue, 18 Nov - Tue, 25 Nov
LHR
London
USM
Koh Samui
€911 Return, found 6 days ago
€911
Return
found 6 days ago
Select KLM flight, departing Tue, 18 Nov from London to Koh Samui, returning Tue, 25 Nov, priced at €911 found 6 days ago
KLM
Tue, 24 Mar - Tue, 31 Mar
LHR
London
USM
Koh Samui
€992 Return, found 3 days ago
€992
Return
found 3 days ago
Select KLM flight, departing Tue, 24 Mar from London to Koh Samui, returning Tue, 31 Mar, priced at €992 found 3 days ago
KLM
Tue, 24 Mar - Tue, 31 Mar
LHR
London
USM
Koh Samui
€1,131 Return, found 3 days ago
€1,131
Return
found 3 days ago
Select KLM flight, departing Tue, 24 Mar from London to Koh Samui, returning Tue, 31 Mar, priced at €1,131 found 3 days ago
London to Samui Intl. Airport route information
Origin airport
Heathrow
Destination airport
Samui Intl. Airport
Airlines serving
Air France, Austrian Airlines, British Airways, Cathay Pacific, EVA Airways, Etihad Airways, Lufthansa, Qatar Airways, Singapore Airlines, Thai Airways International
Popular airline
Etihad Airways
Distance
9836 km

Frequently asked questions

How much is a KLM flight from Heathrow Airport (LHR) to Ko Samui Airport (USM)?
Apply the "Price (lowest to highest)" filter on Expedia to search for cheap KLM return flights from €911 from LHR to USM. Affordable one-way fares from €724 are also available.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from LHR to USM with KLM?
October is one of the cheapest months to jet off to Koh Samui with KLM. You could also find fantastic deals on one-way and return fares in September.
Does KLM fly nonstop from Heathrow Airport (LHR) to Ko Samui Airport (USM)?
To find out if there's a direct route from LHR to USM with KLM or any other carriers, check the "Nonstop" box when searching for flights.
What airports does KLM fly into in Koh Samui?
Take a KLM flight from Heathrow Airport (LHR) to Koh Samui, and you'll most likely touch down at Ko Samui Airport (USM). This is the airline's primary hub here.
Can I change or cancel my KLM flight from Heathrow Airport (LHR) to Ko Samui Airport (USM)?
Changes are typically free within 24 hours of booking, but your airline may add a charge after that. For more details about modifying your reservation, check out your "Trips," select your flight and click on "Manage Booking." If you want the freedom to make changes without additional costs, check the "Changes included" or "No cancel fee" filter when planning your next escape.
*Available to Expedia members.