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

Return flights

22 Aug - 30 Sep	Azul Airlines
25 Aug - 25 Sep	Azul Airlines
26 Aug - 27 Sep	Azul Airlines
23 Aug - 27 Sep	Azul Airlines
29 Aug - 27 Sep	Azul Airlines
30 Aug - 22 Sep	Azul Airlines
23 Aug - 23 Sep	Azul Airlines
28 Aug - 11 Sep	Ryanair
31 Aug - 14 Sep	Azul Airlines
29 Aug - 06 Sep	Azul Airlines
25 Aug - 31 Aug	Azul Airlines
22 Aug - 30 Aug	Azul Airlines
24 Aug - 31 Aug	Azul Airlines
22 Aug - 31 Aug	Royal Air Maroc
19 Aug - 30 Aug	Azul Airlines
22 Aug - 24 Aug	KLM
28 Aug - 31 Aug	Ryanair
18 Aug - 30 Aug	ITA Airways
19 Aug - 28 Aug	LATAM Airlines Group
24 Aug - 27 Aug	Royal Air Maroc

Also check the deals for one-way flights from Madrid to Buenos Aires in August.

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 August from $1098

Return flights