Cheapest return LCY–KGS flights, September

AirHint found the following cheapest return flights from London (LCY) to Kos (KGS) in September 2026 (see full year).

Return flights

15 Sep - 22 Sep SWISS
15 Sep - 28 Sep SWISS
09 Sep - 16 Sep SWISS
16 Sep - 20 Sep SWISS
08 Sep - 15 Sep SWISS
01 Sep - 06 Sep SWISS
08 Sep - 16 Sep SWISS
09 Sep - 14 Sep SWISS
04 Sep - 07 Sep SWISS
18 Sep - 28 Sep Lufthansa
28 Sep - 05 Oct British Airways
30 Sep - 07 Oct SWISS

Also check the deals for one-way flights from London to Kos in September.

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