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

Return flights

01 Dec - 14 Dec	LATAM Airlines Group
01 Dec - 18 Dec	LATAM Airlines Group
09 Dec - 27 Dec	Air Europa
06 Dec - 24 Dec	Iberia
15 Dec - 22 Dec	Vueling Airlines
15 Dec - 16 Jan	LATAM Airlines Group
12 Dec - 28 Dec	Vueling Airlines
15 Dec - 12 Jan	Vueling Airlines
29 Dec - 12 Jan	Air Europa
25 Dec - 31 Dec	Vueling Airlines
30 Dec - 16 Jan	Air Europa
17 Dec - 11 Jan	Vueling Airlines
17 Dec - 14 Jan	Air Europa
25 Dec - 07 Jan	Air Europa
26 Dec - 08 Jan	Vueling Airlines
17 Dec - 09 Jan	Vueling Airlines
17 Dec - 02 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 $1088

Return flights