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

Return flights

02 Sep - 26 Sep	Air France
02 Sep - 23 Sep	Air France
04 Sep - 23 Sep	Air France
03 Sep - 23 Sep	KLM
03 Sep - 24 Sep	Air France
01 Sep - 30 Sep	Air France
03 Sep - 25 Sep	Air France
08 Sep - 26 Sep	Delta
08 Sep - 24 Sep	Delta
05 Sep - 27 Sep	Delta
11 Sep - 01 Oct	Delta
15 Sep - 30 Oct	Delta
15 Sep - 01 Oct	Delta
15 Sep - 06 Oct	Delta
04 Sep - 08 Oct	Air France
15 Sep - 10 Oct	Delta
15 Sep - 05 Oct	Delta
03 Sep - 22 Oct	KLM
01 Sep - 01 Oct	Delta
11 Sep - 07 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.

Book a cheap hotel in Buenos Aires

Cheap car rent in Buenos Aires

Cheapest return flights from Barcelona to Buenos Aires in September from $806

Return flights