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

  • Singapore Airlines

    Singapore Airlines

  • Swiss International Air Lines

    Swiss International Air Lines

  • Air France

    Air France

  • EVA Airways

    EVA Airways

  • Austrian Airlines

    Austrian Airlines

  • British Airways

    British Airways

  • Etihad Airways

    Etihad Airways

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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.

Swiss International Air Lines
Mon, 10 Nov. - Mon, 24 Nov.
LHR
London
USM
Koh Samui
AU$1,390 Return, found 3 days ago
AU$1,390
Return
found 3 days ago
Select Swiss International Air Lines flight, departing Mon, 10 Nov. from London to Koh Samui, returning Mon, 24 Nov., priced at AU$1,390 found 3 days ago
Swiss International Air Lines
Mon, 22 Sep. - Tue, 30 Sep.
LHR
London
USM
Koh Samui
AU$1,444 Return, found 3 days ago
AU$1,444
Return
found 3 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 3 days ago
Singapore Airlines
Mon, 10 Nov. - Mon, 24 Nov.
LGW
London
USM
Koh Samui
AU$1,564 Return, found 3 days ago
AU$1,564
Return
found 3 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 3 days ago
Air France
Thu, 13 Nov. - Thu, 20 Nov.
LHR
London
USM
Koh Samui
AU$1,646 Return, found 2 days ago
AU$1,646
Return
found 2 days ago
Select Air France flight, departing Thu, 13 Nov. from London to Koh Samui, returning Thu, 20 Nov., priced at AU$1,646 found 2 days ago
Austrian Airlines
Mon, 22 Sep. - Tue, 30 Sep.
LHR
London
USM
Koh Samui
AU$1,716 Return, found 3 days ago
AU$1,716
Return
found 3 days ago
Select Austrian Airlines flight, departing Mon, 22 Sep. from London to Koh Samui, returning Tue, 30 Sep., priced at AU$1,716 found 3 days ago
Qatar Airways
Mon, 22 Sep. - Tue, 30 Sep.
LHR
London
USM
Koh Samui
AU$1,721 Return, found 3 days ago
AU$1,721
Return
found 3 days ago
Select Qatar Airways flight, departing Mon, 22 Sep. from London to Koh Samui, returning Tue, 30 Sep., priced at AU$1,721 found 3 days ago
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