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

Return flights

25 Sep - 30 Sep	Ryanair
24 Sep - 27 Sep	easyJet
24 Sep - 01 Oct	Wizz Air Malta
24 Sep - 30 Sep	easyJet
29 Sep - 01 Oct	Wizz Air
25 Sep - 27 Sep	Ryanair
24 Sep - 28 Sep	Turkish Airlines
17 Sep - 23 Sep	SKY express
25 Sep - 29 Sep	Ryanair
26 Sep - 28 Sep	Wizz Air Malta
19 Sep - 23 Sep	Wizz Air Malta
30 Sep - 05 Oct	SKY express
22 Sep - 24 Sep	Pegasus Airlines
25 Sep - 01 Oct	easyJet
30 Sep - 04 Oct	Ryanair
23 Sep - 01 Oct	easyJet
30 Sep - 03 Oct	SKY express
28 Sep - 01 Oct	Pegasus Airlines
23 Sep - 13 Oct	easyJet
25 Sep - 02 Oct	Ryanair

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 $197

Return flights