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

Return flights

31 Dec - 27 Jan	Iberia
31 Dec - 25 Jan	Iberia
31 Dec - 26 Jan	Iberia
28 Dec - 27 Jan	LATAM Airlines Group
28 Dec - 28 Jan	KLM
30 Dec - 28 Jan	Ryanair
31 Dec - 30 Jan	easyJet
30 Dec - 27 Jan	LATAM Airlines Group
29 Dec - 25 Jan	Vueling Airlines
29 Dec - 30 Jan	Vueling Airlines
24 Dec - 31 Dec	KLM
26 Dec - 31 Dec	Air France
28 Dec - 29 Dec	Air France
23 Dec - 29 Dec	KLM
23 Dec - 26 Dec	Vueling Airlines
27 Dec - 31 Dec	LATAM Airlines Group
22 Dec - 28 Dec	KLM
25 Dec - 31 Dec	ITA Airways
26 Dec - 29 Dec	Vueling Airlines
25 Dec - 28 Dec	ITA Airways

Also check the deals for one-way flights from Barcelona 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 Barcelona to Buenos Aires in December from 1105€

Return flights