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

Return flights

05 May - 18 May	Air Canada
06 May - 18 May	Air Canada
12 May - 18 May	Air Canada
14 May - 21 May	Avianca
21 May - 18 Jun	Iberia
26 May - 01 Jun	Lufthansa
18 May - 01 Jun	Royal Air Maroc
08 May - 22 May	Iberia
04 May - 18 May	Royal Air Maroc
05 May - 27 May	Iberia
11 May - 27 May	Avianca
13 May - 27 May	Avianca
19 May - 21 Jun	Iberia
01 May - 25 May	Avianca
01 May - 11 Jun	Avianca
02 May - 01 Jun	Royal Air Maroc
04 May - 08 Jun	Avianca
23 May - 04 Jun	LATAM Airlines Group
21 May - 30 Jun	SWISS
06 May - 28 Jun	SWISS

Also check the deals for one-way flights from Barcelona 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 Barcelona to Buenos Aires in May from $891

Return flights