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

Return flights

05 Dec - 29 Dec	LATAM Airlines Group
06 Dec - 27 Dec	Air Europa
12 Dec - 08 Jan	Vueling Airlines
04 Dec - 04 Jan	LATAM Airlines Group
04 Dec - 05 Jan	Iberia
12 Dec - 05 Jan	Vueling Airlines
13 Dec - 05 Jan	Vueling Airlines
06 Dec - 05 Jan	Air Europa
24 Dec - 06 Jan	Iberia
15 Dec - 05 Jan	Vueling Airlines
15 Dec - 06 Jan	Vueling Airlines
20 Dec - 31 Dec	Vueling Airlines
09 Dec - 04 Jan	Vueling Airlines

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

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 December from $1493

Return flights