Cheapest return CGN–HEL flights, September

AirHint found the following cheapest return flights from Cologne (CGN) to Helsinki (HEL) in September 2026 (see full year).

Return flights

18 Sep - 23 Sep Ryanair
18 Sep - 22 Sep Ryanair
22 Sep - 26 Sep Ryanair
20 Sep - 26 Sep Ryanair
19 Sep - 26 Sep Ryanair
17 Sep - 20 Sep Ryanair
23 Sep - 27 Sep Ryanair
20 Sep - 05 Oct Ryanair
22 Sep - 27 Sep Ryanair
04 Sep - 06 Sep Ryanair
28 Sep - 03 Oct Lufthansa

Also check the deals for one-way flights from Cologne to Helsinki in September.

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