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

Return flights

20 Sep - 21 Sep	Eurowings	direct
25 Sep - 28 Sep	Pegasus Airlines
23 Sep - 28 Sep	Condor
23 Sep - 26 Sep	Pegasus Airlines
24 Sep - 26 Sep	Pegasus Airlines
25 Sep - 26 Sep	Pegasus Airlines
24 Sep - 28 Sep	AJet
20 Sep - 27 Sep	Eurowings	direct
27 Sep - 09 Oct	AJet
26 Sep - 28 Sep	AJet
22 Sep - 26 Sep	Condor
20 Sep - 05 Oct	Eurowings	direct
29 Sep - 01 Oct	Eurowings	direct
30 Sep - 02 Oct	Eurowings	direct
30 Sep - 01 Oct	Eurowings	direct
26 Sep - 01 Oct	AJet
30 Sep - 03 Oct	Eurowings

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 144€

Return flights