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

Return flights

14 Sep - 19 Sep	Chair Airlines
04 Sep - 15 Sep	Condor	direct
04 Sep - 08 Sep	Condor	direct
04 Sep - 12 Sep	Condor
18 Sep - 22 Sep	Condor	direct
04 Sep - 11 Sep	Condor
14 Sep - 20 Sep	Chair Airlines
17 Sep - 24 Sep	easyJet
18 Sep - 25 Sep	easyJet
09 Sep - 18 Sep	easyJet
18 Sep - 02 Oct	Condor
24 Sep - 02 Oct	easyJet
27 Sep - 06 Oct	Ethiopian Airlines
26 Sep - 01 Oct	Eurowings
18 Sep - 02 Oct	Condor	direct
28 Sep - 05 Oct	Ethiopian Airlines
21 Sep - 05 Oct	Ethiopian Airlines
29 Sep - 06 Oct	Eurowings
27 Sep - 05 Oct	Ethiopian Airlines
20 Sep - 03 Oct	Ethiopian Airlines

Also check the deals for one-way flights from Zurich to Kos 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 Zurich to Kos in September from 204€

Return flights