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

Return flights

01 Dec - 08 Dec	Air Canada
04 Dec - 21 Jan	Air Canada
04 Dec - 22 Jan	Royal Air Maroc
04 Dec - 08 Dec	Royal Air Maroc
04 Dec - 09 Dec	Royal Air Maroc
01 Dec - 06 Dec	Royal Air Maroc
04 Dec - 10 Dec	Ryanair
01 Dec - 10 Dec	Air Europa
03 Dec - 09 Dec	Iberia
03 Dec - 10 Dec	Iberia
04 Dec - 11 Dec	Avianca
03 Dec - 07 Dec	TAP
04 Dec - 27 Jan	Ryanair
10 Dec - 27 Jan	Azul Airlines
31 Dec - 28 Jan	LATAM Airlines Group
02 Dec - 29 Jan	Azul Airlines
04 Dec - 26 Jan	Ryanair
09 Dec - 27 Jan	Azul Airlines
03 Dec - 28 Jan	TAP
15 Dec - 29 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 903€

Return flights