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

Return flights

11 Sep - 15 Oct	LATAM Airlines Group
13 Sep - 24 Oct	LATAM Airlines Group
25 Sep - 14 Oct	Wizz Air Malta
22 Sep - 17 Oct	Ryanair
23 Sep - 14 Oct	LATAM Airlines Group
01 Sep - 01 Oct	LATAM Airlines Group
03 Sep - 17 Sep	TAP
17 Sep - 10 Oct	Ryanair
07 Sep - 14 Sep	Air Europa
18 Sep - 09 Oct	SWISS
02 Sep - 30 Sep	LATAM Airlines Group
01 Sep - 30 Sep	SWISS
01 Sep - 15 Oct	SWISS
18 Sep - 20 Oct	SWISS
06 Sep - 29 Sep	SWISS
22 Sep - 30 Sep	SWISS
15 Sep - 29 Sep	SWISS
22 Sep - 29 Sep	LATAM Airlines Group
21 Sep - 30 Sep	SWISS
17 Sep - 27 Sep	LATAM Airlines Group

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 $908

Return flights