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

Return flights

16 Sep - 23 Sep	Avianca
13 Sep - 14 Oct	Avianca
19 Sep - 01 Oct	Avianca
01 Sep - 27 Oct	Avianca
01 Sep - 02 Oct	Avianca
01 Sep - 21 Oct	Avianca
02 Sep - 28 Oct	Avianca
02 Sep - 22 Oct	Avianca
20 Sep - 05 Oct	Avianca
15 Sep - 19 Sep	Avianca
16 Sep - 25 Sep	Avianca
22 Sep - 28 Sep	Avianca
22 Sep - 29 Sep	Avianca
15 Sep - 27 Sep	Avianca
22 Sep - 26 Sep	Avianca
15 Sep - 23 Sep	Avianca
08 Sep - 19 Sep	Avianca
01 Sep - 26 Sep	Avianca
19 Sep - 04 Oct	Avianca
20 Sep - 15 Oct	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 867€

Return flights