AirHint found the following cheapest return flights from Barcelona (BCN) to Buenos Aires (EZE) in September 2025 (see full year).

Return flights

04 Sep - 08 Oct	Air France
04 Sep - 14 Sep	Delta
04 Sep - 13 Sep	Delta
06 Sep - 21 Sep	Delta
05 Sep - 12 Sep	Delta
03 Sep - 21 Sep	Delta
05 Sep - 28 Sep	Delta
06 Sep - 12 Sep	Delta
08 Sep - 14 Sep	Delta
03 Sep - 23 Sep	Delta
07 Sep - 14 Sep	Delta
08 Sep - 24 Oct	Delta
03 Sep - 23 Oct	Delta
02 Sep - 29 Oct	Delta
18 Sep - 02 Oct	Delta
17 Sep - 29 Oct	Delta
01 Sep - 13 Oct	Air France
01 Sep - 15 Oct	Air France
06 Sep - 02 Oct	Delta
03 Sep - 02 Oct	Delta

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 718€

Return flights