Thai Airways International Cheap Flights from London to Samui Intl. Airport

View €712 flight on Sat, 16 May 2026Opens in a new window

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Prices were available within the past 7 days and start at €712 for one-way flights and €1,134 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thai Airways International
Fri, 17 Apr - Wed, 22 Apr
LHR
London
USM
Koh Samui
€1,134 Return, found 14 hours ago
€1,134
Return
found 14 hours ago
Select Thai Airways International flight, departing Fri, 17 Apr from London to Koh Samui, returning Wed, 22 Apr, priced at €1,134 found 14 hours ago

Frequently asked questions

How much is a Thai Airways International flight from Heathrow Airport (LHR) to Ko Samui Airport (USM)?
Apply the "Price (lowest to highest)" filter on Expedia to find cheap Thai Airways International round-trip flights from €1,134 from LHR to USM. Affordable one-way tickets from €712 are also on offer.**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 Thai Airways International?
Search for one-way or return flights to Koh Samui in October or September. You could find a cheap fare with Thai Airways International during these quieter months.
Does Thai Airways International fly nonstop from Heathrow Airport (LHR) to Ko Samui Airport (USM)?
Fill in your dates, press search and select the "Nonstop" filter on Expedia to find any direct flights from LHR to USM with Thai Airways International or other carriers.
What airports does Thai Airways International fly into in Koh Samui?
Ko Samui Airport (USM) is the primary Koh Samui gateway for Thai Airways International flights from Heathrow Airport (LHR).
Can I change or cancel my Thai Airways International flight from Heathrow Airport (LHR) to Ko Samui Airport (USM)?
Depending on the type of ticket you purchased, a fee will generally apply if you change or cancel your flight more than 24 hours after it's confirmed. To find plane tickets with more flexibility, select our "Changes included" or "No cancel fee" filter when you search for flights. To learn more about cancelling or modifying your reservation, head to "Trips," select your flight and click on "Manage Booking."

Travel information

Origin airport
Heathrow
Destination airport
Samui Intl. Airport
Airlines serving
Air France, Austrian Airlines, British Airways, EVA Airways, Etihad Airways, KLM, Lufthansa, Qatar Airways, Singapore Airlines, Swiss International Air Lines, Thai Airways International
Popular airline
British Airways
Distance
9836 km

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