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

Return flights

06 May - 13 May	Air Canada
06 May - 27 May	Air Canada
19 May - 17 Jun	Lufthansa
13 May - 18 May	Air Canada
06 May - 18 May	Air Canada
26 May - 16 Jun	Lufthansa
05 May - 16 Jun	Lufthansa
20 May - 15 Jun	Lufthansa
04 May - 18 May	Air Canada
28 May - 09 Jun	Lufthansa
01 May - 03 Jun	Lufthansa
01 May - 09 Jun	Lufthansa
09 May - 09 Jun	Lufthansa
21 May - 14 Jun	Lufthansa
02 May - 09 Jun	Lufthansa
20 May - 31 May	Lufthansa
01 May - 29 May	Lufthansa
02 May - 29 May	Lufthansa
17 May - 31 May	Lufthansa
15 May - 29 May	Lufthansa

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 628€

Return flights