฿26,475 Cheap Thai Airways International flights from London to Samui Intl. Airport (LHR→USM)

View ฿26,475 flight on Tue, 27 Oct 2026Opens in a new window

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Thai Airways International flights from London to Samui Intl. Airport (LHR→USM)

Prices were available within the past 7 days and start at ฿26,475 for one-way flights and ฿40,765 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thai Airways International
Thu, 23 Apr - Wed, 6 May
LHR
London
USM
Koh Samui
฿40,765 Return, found 22 hours ago
฿40,765
Return
found 22 hours ago
Select Thai Airways International flight, departing Thu, 23 Apr from London to Koh Samui, returning Wed, 6 May, priced at ฿40,765 found 22 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 ฿40,765 from LHR to USM. Affordable one-way tickets from ฿26,475 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, Cathay Pacific, EVA Airways, Etihad Airways, KLM, Lufthansa, Malaysia Airlines, Qatar Airways, Swiss International Air Lines, Thai Airways International, Turkish Airlines
Popular airline
EVA Airways
Distance
9836 km
*Available to Expedia members.