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

Return flights

02 Dec - 10 Dec	Vueling Airlines
05 Dec - 08 Dec	Air Europa
01 Dec - 11 Dec	Volotea
01 Dec - 18 Dec	Volotea
24 Dec - 25 Jan	Iberia
15 Dec - 16 Jan	Vueling Airlines
16 Dec - 18 Dec	Iberia
12 Dec - 19 Dec	Iberia
12 Dec - 27 Dec	Iberia
23 Dec - 15 Jan	Iberia
12 Dec - 28 Dec	Iberia
13 Dec - 27 Dec	Vueling Airlines
23 Dec - 09 Jan	Air Europa
18 Dec - 18 Jan	Air Europa
23 Dec - 02 Jan	Air Europa
20 Dec - 27 Dec	Air Europa
26 Dec - 11 Jan	Air Europa
11 Dec - 03 Jan	Iberia
16 Dec - 08 Jan	Iberia
25 Dec - 05 Jan	Iberia

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.

Book a cheap hotel in Buenos Aires

Cheap car rent in Buenos Aires

Cheapest return flights from Bilbao to Buenos Aires in December from $1087

Return flights