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

Return flights

03 Dec - 08 Dec	TAP
04 Dec - 09 Dec	TAP
02 Dec - 09 Dec	TAP
02 Dec - 07 Dec	TAP
02 Dec - 11 Dec	TAP
03 Dec - 28 Jan	TAP
03 Dec - 10 Dec	Air Canada
08 Dec - 29 Jan	TAP
04 Dec - 11 Dec	TAP
04 Dec - 29 Jan	Iberia
01 Dec - 27 Jan	TAP
15 Dec - 30 Jan	Royal Air Maroc
01 Dec - 14 Dec	TAP
05 Dec - 13 Dec	Royal Air Maroc
04 Dec - 31 Jan	Azul Airlines
05 Dec - 21 Dec	TAP
07 Dec - 31 Jan	Ryanair
31 Dec - 25 Jan	Avianca
12 Dec - 23 Jan	easyJet
02 Dec - 20 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 825€

Return flights