AirHint found the following cheapest return flights from Barcelona (BCN) to Buenos Aires (AEP) in September 2026 (see full year).

Return flights

07 Sep - 17 Sep	Royal Air Maroc
08 Sep - 28 Sep	Royal Air Maroc
11 Sep - 24 Sep	Royal Air Maroc
11 Sep - 19 Sep	Royal Air Maroc
07 Sep - 07 Oct	Ryanair
10 Sep - 28 Sep	SWISS
07 Sep - 14 Sep	Ryanair
07 Sep - 21 Sep	Ryanair
11 Sep - 08 Oct	Ryanair
07 Sep - 27 Sep	Ryanair
11 Sep - 16 Oct	Ryanair
11 Sep - 21 Sep	Ryanair
07 Sep - 12 Sep	Ryanair
15 Sep - 03 Oct	LATAM Airlines Group
02 Sep - 01 Oct	LATAM Airlines Group
02 Sep - 02 Oct	LATAM Airlines Group
08 Sep - 10 Oct	Vueling Airlines
01 Sep - 01 Oct	Vueling Airlines
01 Sep - 07 Oct	LEVEL
01 Sep - 02 Oct	LATAM Airlines Group

Also check the deals for one-way flights from Barcelona 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 Barcelona to Buenos Aires in September from 864€

Return flights