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

Return flights

02 Sep - 06 Sep	Wizz Air
24 Sep - 04 Oct	Ryanair	direct
19 Sep - 24 Sep	easyJet
03 Sep - 24 Sep	Ryanair	direct
06 Sep - 24 Sep	Ryanair	direct
16 Sep - 20 Sep	Ryanair
16 Sep - 21 Sep	Ryanair
17 Sep - 24 Sep	Ryanair	direct
04 Sep - 09 Sep	SKY express
12 Sep - 17 Sep	Ryanair
30 Sep - 05 Oct	Ryanair
17 Sep - 04 Oct	Ryanair	direct
03 Sep - 13 Sep	Ryanair	direct
24 Sep - 15 Oct	Ryanair	direct
24 Sep - 08 Oct	Ryanair	direct
24 Sep - 01 Oct	Ryanair	direct
27 Sep - 04 Oct	Ryanair	direct
28 Sep - 05 Oct	Turkish Airlines
20 Sep - 04 Oct	Ryanair	direct
17 Sep - 08 Oct	Ryanair	direct

Also check the deals for one-way flights from Athens to Cologne 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 Athens to Cologne in September from 159€

Return flights