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

Return flights

02 Dec - 09 Dec	Azul Airlines
04 Dec - 08 Dec	LATAM Airlines Group
01 Dec - 08 Dec	Air Europa
11 Dec - 28 Jan	Air Canada
04 Dec - 09 Dec	Azul Airlines
06 Dec - 09 Dec	Azul Airlines
05 Dec - 08 Dec	LATAM Airlines Group
04 Dec - 10 Dec	Azul Airlines
02 Dec - 10 Dec	Azul Airlines
04 Dec - 11 Dec	Azul Airlines
02 Dec - 11 Dec	Azul Airlines
10 Dec - 25 Jan	Air Canada
01 Dec - 31 Jan	TAP
28 Dec - 28 Jan	LATAM Airlines Group
10 Dec - 27 Jan	Azul Airlines
31 Dec - 28 Jan	LATAM Airlines Group
07 Dec - 26 Jan	Azul Airlines
29 Dec - 28 Jan	LATAM Airlines Group
08 Dec - 27 Jan	Azul Airlines
28 Dec - 31 Jan	LATAM Airlines Group

Also check the deals for one-way flights from Madrid 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 Madrid to Buenos Aires in December from 809€

Return flights