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

Return flights

12 May - 18 May	TAP
05 May - 22 May	TAP
04 May - 17 May	TAP
04 May - 18 May	TAP
17 May - 24 May	TAP
12 May - 19 May	TAP
13 May - 20 May	TAP
27 May - 14 Jun	SWISS
04 May - 11 May	TAP
06 May - 28 Jun	SWISS
04 May - 16 May	TAP
15 May - 30 May	TAP
19 May - 17 Jun	SWISS
19 May - 16 Jun	SWISS
27 May - 16 Jun	SWISS
26 May - 17 Jun	SWISS
23 May - 15 Jun	SWISS
26 May - 16 Jun	SWISS
27 May - 30 Jun	SWISS
27 May - 17 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 $855

Return flights