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

Return flights

29 Dec - 29 Jan	Delta
29 Dec - 28 Jan	Delta
27 Dec - 29 Jan	Delta
29 Dec - 22 Jan	Delta
30 Dec - 22 Jan	Delta
30 Dec - 27 Jan	Delta
24 Dec - 29 Jan	Delta
25 Dec - 28 Jan	Delta
28 Dec - 22 Jan	Delta
29 Dec - 26 Jan	Delta
25 Dec - 28 Dec	Delta
26 Dec - 28 Dec	Air France
24 Dec - 28 Dec	Air France
20 Dec - 24 Dec	Lufthansa
24 Dec - 25 Dec	Delta
22 Dec - 28 Dec	Air France
23 Dec - 28 Dec	Air France
26 Dec - 29 Dec	Air France
20 Dec - 27 Dec	Lufthansa
23 Dec - 27 Dec	Delta

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 743€

Return flights