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

Return flights

30 Oct - 28 Nov	Air Europa
06 Oct - 27 Oct	Ryanair
06 Oct - 20 Oct	Ryanair
11 Oct - 20 Oct	Ryanair
06 Oct - 13 Oct	Ryanair
16 Oct - 25 Oct	easyJet
20 Oct - 23 Oct	Ryanair
06 Oct - 11 Nov	Ryanair
13 Oct - 27 Oct	Azul Airlines
20 Oct - 22 Nov	Ryanair
11 Oct - 13 Oct	Ryanair
06 Oct - 14 Nov	Ryanair
16 Oct - 26 Oct	easyJet
16 Oct - 27 Oct	easyJet
27 Oct - 10 Nov	Avianca
27 Oct - 09 Nov	Iberia
27 Oct - 11 Nov	Avianca
27 Oct - 28 Nov	Iberia
29 Oct - 12 Nov	Iberia
27 Oct - 25 Nov	Iberia

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

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 October from $990

Return flights