Cheap flights from London to Koh Samui Islands

View AU$863 flight on Fri, 16 Jan. 2026Opens in a new window

Popular airlines from London to Koh Samui Islands

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    Turkish Airlines

  • Air France

    Air France

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Cheap Flights from London (LON) to Koh Samui Islands (USM)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Austrian Airlines
Thu, 22 Jan. - Wed, 28 Jan.
LHR
London
USM
Koh Samui
AU$1,334 Return, found 1 day ago
AU$1,334
Return
found 1 day ago
Select Austrian Airlines flight, departing Thu, 22 Jan. from London to Koh Samui, returning Wed, 28 Jan., priced at AU$1,334 found 1 day ago
Swiss International Air Lines
Mon, 22 Sep. - Tue, 30 Sep.
LHR
London
USM
Koh Samui
AU$1,444 Return, found 5 days ago
AU$1,444
Return
found 5 days ago
Select Swiss International Air Lines flight, departing Mon, 22 Sep. from London to Koh Samui, returning Tue, 30 Sep., priced at AU$1,444 found 5 days ago
Swiss International Air Lines
Mon, 15 Sep. - Tue, 30 Sep.
LCY
London
USM
Koh Samui
AU$1,475 Return, found 1 day ago
AU$1,475
Return
found 1 day ago
Select Swiss International Air Lines flight, departing Mon, 15 Sep. from London to Koh Samui, returning Tue, 30 Sep., priced at AU$1,475 found 1 day ago
Air France
Thu, 18 Sep. - Wed, 1 Oct.
LHR
London
USM
Koh Samui
AU$1,525 Return, found 7 hours ago
AU$1,525
Return
found 7 hours ago
Select Air France flight, departing Thu, 18 Sep. from London to Koh Samui, returning Wed, 1 Oct., priced at AU$1,525 found 7 hours ago
Singapore Airlines
Mon, 10 Nov. - Mon, 24 Nov.
LGW
London
USM
Koh Samui
AU$1,564 Return, found 5 days ago
AU$1,564
Return
found 5 days ago
Select Singapore Airlines flight, departing Mon, 10 Nov. from London to Koh Samui, returning Mon, 24 Nov., priced at AU$1,564 found 5 days ago
KLM
Thu, 18 Sep. - Wed, 1 Oct.
LHR
London
USM
Koh Samui
AU$1,566 Return, found 7 hours ago
AU$1,566
Return
found 7 hours ago
Select KLM flight, departing Thu, 18 Sep. from London to Koh Samui, returning Wed, 1 Oct., priced at AU$1,566 found 7 hours ago
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