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

Return flights

12 Sep - 16 Sep	Ryanair
12 Sep - 19 Sep	Ryanair
22 Sep - 30 Sep	Wizz Air Malta
22 Sep - 28 Sep	Wizz Air Malta
22 Sep - 04 Oct	Wizz Air Malta
22 Sep - 24 Sep	Wizz Air Malta
22 Sep - 25 Sep	Wizz Air Malta
22 Sep - 27 Sep	Wizz Air Malta
22 Sep - 26 Sep	Wizz Air Malta
26 Sep - 01 Oct	Wizz Air
29 Sep - 03 Oct	Wizz Air Malta
23 Sep - 25 Sep	Ryanair
16 Sep - 23 Sep	Wizz Air
11 Sep - 13 Oct	easyJet
30 Sep - 06 Oct	Ryanair
13 Sep - 04 Oct	SKY express
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 202€

Return flights