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

Return flights

21 Sep - 14 Oct	ITA Airways
09 Sep - 16 Sep	ITA Airways
25 Sep - 29 Sep	ITA Airways
23 Sep - 30 Sep	ITA Airways
26 Sep - 30 Sep	ITA Airways
18 Sep - 22 Sep	ITA Airways
27 Sep - 11 Oct	ITA Airways
13 Sep - 16 Sep	ITA Airways
30 Sep - 07 Oct	Aegean Airlines
28 Sep - 29 Sep	ITA Airways
20 Sep - 23 Sep	ITA Airways
16 Sep - 19 Sep	ITA Airways
11 Sep - 16 Sep	ITA Airways
29 Sep - 06 Oct	ITA Airways
28 Sep - 12 Oct	ITA Airways
19 Sep - 04 Oct	ITA Airways
23 Sep - 09 Oct	Volotea
23 Sep - 11 Oct	Volotea
30 Sep - 15 Oct	Volotea
27 Sep - 15 Oct	Volotea

Also check the deals for one-way flights from Florence 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 Florence to Athens in September from 140€

Return flights