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

Return flights

16 Sep - 23 Sep	Ryanair
23 Sep - 30 Sep	Ryanair
10 Sep - 13 Sep	Ryanair
28 Sep - 30 Sep	Ryanair
09 Sep - 23 Sep	Ryanair
26 Sep - 30 Sep	Ryanair
08 Sep - 09 Sep	Ryanair
14 Sep - 19 Sep	Ryanair
01 Sep - 03 Sep	Ryanair
01 Sep - 17 Sep	Ryanair
25 Sep - 04 Oct	Ryanair
26 Sep - 03 Oct	Ryanair
26 Sep - 06 Oct	Ryanair
29 Sep - 01 Oct	Ryanair
25 Sep - 01 Oct	Ryanair
21 Sep - 19 Oct	Ryanair
29 Sep - 05 Oct	Ryanair
24 Sep - 05 Oct	Ryanair
20 Sep - 18 Oct	Ryanair
20 Sep - 19 Oct	Ryanair

Also check the deals for one-way flights from Rome to Athens 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 Rome to Athens in September from $157

Return flights