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

Return flights

30 Sep - 23 Oct	Ryanair
22 Sep - 06 Oct	Avianca
20 Sep - 29 Oct	Avianca
29 Sep - 22 Oct	Azul Airlines
26 Sep - 05 Oct	Avianca
26 Sep - 06 Oct	Avianca
19 Sep - 05 Oct	Avianca
26 Sep - 31 Oct	Azul Airlines
25 Sep - 09 Oct	Avianca
22 Sep - 02 Oct	Azul Airlines
26 Sep - 28 Sep	Azul Airlines
23 Sep - 25 Sep	Ryanair
21 Sep - 27 Sep	Azul Airlines
21 Sep - 29 Sep	Azul Airlines
20 Sep - 27 Sep	Azul Airlines
20 Sep - 22 Sep	Avianca

Also check the deals for one-way flights from Paris 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 Paris to Buenos Aires in September from 857€

Return flights