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

Return flights

01 Dec - 07 Dec	LATAM Airlines Group
04 Dec - 11 Dec	Air Europa
01 Dec - 18 Dec	LATAM Airlines Group
14 Dec - 29 Jan	Vueling Airlines
11 Dec - 28 Dec	easyJet
12 Dec - 28 Dec	Air Europa
15 Dec - 15 Jan	Wizz Air Malta
15 Dec - 16 Jan	Wizz Air Malta
05 Dec - 01 Jan	Iberia
15 Dec - 08 Jan	Wizz Air Malta
22 Dec - 08 Jan	Vueling Airlines
22 Dec - 11 Jan	Vueling Airlines
23 Dec - 08 Jan	Air Europa
02 Dec - 30 Dec	Vueling Airlines
16 Dec - 08 Jan	easyJet
17 Dec - 28 Dec	Wizz Air Malta
20 Dec - 28 Dec	Vueling Airlines
26 Dec - 11 Jan	Air Europa
10 Dec - 17 Dec	LATAM Airlines Group
15 Dec - 31 Dec	LATAM Airlines Group

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 753€

Return flights