AirHint found the following cheapest return flights from Cologne (CGN) to Zurich (ZRH) in September 2025 (see full year).

Return flights

05 Sep - 08 Sep	Eurowings	direct
03 Sep - 08 Sep	Eurowings	direct
15 Sep - 22 Sep	Eurowings	direct
19 Sep - 23 Sep	Eurowings	direct
19 Sep - 21 Sep	Eurowings	direct
12 Sep - 14 Sep	Eurowings	direct
26 Sep - 28 Sep	Eurowings	direct
11 Sep - 14 Sep	Eurowings	direct
02 Sep - 05 Sep	Eurowings	direct
14 Sep - 19 Sep	Eurowings	direct

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

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Cologne to Zurich in September from $114

Return flights