Cheap Flights from London to Koh Samui

View €481 flight on Mon, 19 Jan 2026Opens in a new window

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Cheap flights from London to Koh Samui (LON-USM)

Prices were available within the past 7 days and start at €481 for one-way flights and €776 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Swiss International Air Lines
Thu, 5 Mar - Fri, 13 Mar
LHR
London
USM
Koh Samui
€776 Return, found 1 day ago
€776
Return
found 1 day ago
Select Swiss International Air Lines flight, departing Thu, 5 Mar from London to Koh Samui, returning Fri, 13 Mar, priced at €776 found 1 day ago
Air France
Thu, 6 Nov - Thu, 20 Nov
LHR
London
USM
Koh Samui
€858 Return, found 1 day ago
€858
Return
found 1 day ago
Select Air France flight, departing Thu, 6 Nov from London to Koh Samui, returning Thu, 20 Nov, priced at €858 found 1 day ago
Swiss International Air Lines
Thu, 5 Mar - Fri, 13 Mar
LHR
London
USM
Koh Samui
€868 Return, found 1 day ago
€868
Return
found 1 day ago
Select Swiss International Air Lines flight, departing Thu, 5 Mar from London to Koh Samui, returning Fri, 13 Mar, priced at €868 found 1 day ago
Austrian Airlines
Thu, 5 Mar - Fri, 13 Mar
LHR
London
USM
Koh Samui
€894 Return, found 1 day ago
€894
Return
found 1 day ago
Select Austrian Airlines flight, departing Thu, 5 Mar from London to Koh Samui, returning Fri, 13 Mar, priced at €894 found 1 day ago
Singapore Airlines
Thu, 5 Mar - Fri, 13 Mar
LGW
London
USM
Koh Samui
€906 Return, found 1 day ago
€906
Return
found 1 day ago
Select Singapore Airlines flight, departing Thu, 5 Mar from London to Koh Samui, returning Fri, 13 Mar, priced at €906 found 1 day ago
KLM
Thu, 6 Nov - Thu, 20 Nov
LHR
London
USM
Koh Samui
€972 Return, found 1 day ago
€972
Return
found 1 day ago
Select KLM flight, departing Thu, 6 Nov from London to Koh Samui, returning Thu, 20 Nov, priced at €972 found 1 day ago
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