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

Return flights

12 Sep - 14 Sep	Ryanair
15 Sep - 17 Sep	Wizz Air Malta
30 Sep - 08 Oct	Ryanair
30 Sep - 06 Oct	Ryanair
09 Sep - 16 Sep	SKY express
15 Sep - 19 Sep	Wizz Air Malta
22 Sep - 25 Sep	Wizz Air Malta
15 Sep - 18 Sep	Wizz Air Malta
25 Sep - 04 Oct	Wizz Air Malta
23 Sep - 30 Sep	Wizz Air
23 Sep - 24 Sep	Wizz Air
23 Sep - 26 Sep	Wizz Air
08 Sep - 10 Sep	Wizz Air Malta
26 Sep - 05 Oct	easyJet
27 Sep - 12 Oct	Ryanair
26 Sep - 03 Oct	easyJet
27 Sep - 01 Oct	Ryanair
10 Sep - 11 Oct	Aegean Airlines
10 Sep - 12 Oct	Aegean Airlines
26 Sep - 04 Oct	Aegean Airlines

Also check the deals for one-way flights from Athens to Warsaw 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 Warsaw in September from $199

Return flights