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	Royal Air Maroc
01 Dec - 08 Dec	Royal Air Maroc
04 Dec - 21 Jan	Air Canada
04 Dec - 10 Dec	Ryanair
02 Dec - 10 Dec	Azul Airlines
01 Dec - 31 Dec	Air Canada
03 Dec - 10 Dec	Iberia
05 Dec - 08 Dec	easyJet
05 Dec - 10 Dec	easyJet
05 Dec - 09 Dec	easyJet
01 Dec - 12 Dec	TAP
04 Dec - 30 Jan	Ryanair
02 Dec - 31 Jan	Azul Airlines
10 Dec - 27 Jan	Azul Airlines
10 Dec - 30 Jan	Azul Airlines
02 Dec - 29 Jan	Azul Airlines
30 Dec - 28 Jan	Ryanair
30 Dec - 27 Jan	Ryanair
30 Dec - 29 Jan	Ryanair
06 Dec - 29 Jan	Azul Airlines

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 $1023

Return flights