AirHint found the following cheapest return flights from Madrid (MAD) to Buenos Aires (AEP) in May 2026 (see full year).

Return flights

06 May - 18 May	Air Canada
05 May - 14 May	Avianca
03 May - 18 May	Air Canada
11 May - 17 May	Air Europa
19 May - 26 May	Avianca
06 May - 19 May	Avianca
04 May - 17 May	Avianca
18 May - 30 May	Avianca
04 May - 19 May	Avianca
16 May - 23 May	Avianca
24 May - 07 Jun	Avianca
03 May - 03 Jun	LATAM Airlines Group
01 May - 01 Jun	Avianca
04 May - 05 Jun	SWISS
31 May - 12 Jun	LATAM Airlines Group
20 May - 08 Jun	SWISS

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

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 May from 783€

Return flights