AirHint found the following cheapest return flights from Bilbao (BIO) to Buenos Aires (AEP) in August 2025 (see full year).

Return flights

14 Aug - 24 Aug	LATAM Airlines Group
11 Aug - 22 Aug	LATAM Airlines Group
14 Aug - 08 Sep	Air Europa
24 Aug - 31 Aug	Air Europa
12 Aug - 21 Aug	LATAM Airlines Group
22 Aug - 30 Aug	Iberia
10 Aug - 24 Aug	Air Europa
04 Aug - 11 Aug	Air Europa
05 Aug - 12 Aug	Air Europa
06 Aug - 30 Aug	Vueling Airlines
05 Aug - 30 Aug	Air Europa

Also check the deals for one-way flights from Bilbao to Buenos Aires in August.

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 Bilbao to Buenos Aires in August from 1227€

Return flights