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

Return flights

26 Oct - 27 Nov	Ryanair
26 Oct - 18 Nov	Ryanair
26 Oct - 30 Oct	Ryanair
16 Oct - 24 Oct	easyJet
20 Oct - 08 Nov	Avianca
27 Oct - 08 Nov	Iberia
20 Oct - 24 Oct	Iberia
27 Oct - 16 Nov	Avianca
06 Oct - 30 Oct	Avianca
06 Oct - 21 Oct	Ryanair
06 Oct - 27 Oct	Ryanair
06 Oct - 13 Oct	Ryanair
17 Oct - 24 Oct	Air Europa
15 Oct - 24 Oct	easyJet
11 Oct - 20 Oct	Royal Air Maroc
20 Oct - 21 Nov	Avianca
27 Oct - 06 Nov	Air Europa
27 Oct - 03 Nov	Air Europa
16 Oct - 14 Nov	easyJet
27 Oct - 15 Nov	Avianca

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 834€

Return flights