AirHint found the following cheapest return flights from Rome (FCO) to Buenos Aires (AEP) in September 2025 (see full year).

Return flights

23 Sep - 21 Oct	ITA Airways
25 Sep - 31 Oct	Ryanair
26 Sep - 17 Oct	ITA Airways
22 Sep - 07 Oct	ITA Airways
27 Sep - 24 Oct	LATAM Airlines Group
26 Sep - 12 Oct	ITA Airways
25 Sep - 12 Oct	ITA Airways
30 Sep - 13 Oct	Ryanair
24 Sep - 08 Oct	ITA Airways
25 Sep - 09 Oct	ITA Airways
23 Sep - 30 Sep	TAP
25 Sep - 28 Sep	Ryanair
25 Sep - 27 Sep	TAP
21 Sep - 28 Sep	Vueling Airlines
24 Sep - 29 Sep	LATAM Airlines Group
20 Sep - 30 Sep	Transavia France
19 Sep - 23 Sep	ITA Airways

Also check the deals for one-way flights from Rome to Buenos Aires 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 Buenos Aires in September from 950€

Return flights