AirHint found the following cheapest return flights from Porto Alegre (POA) to Buenos Aires (AEP) in March 2026 (see full year).

Return flights

07 Mar - 13 Mar	Aerolineas Argentinas	direct
14 Mar - 20 Mar	Aerolineas Argentinas	direct
06 Mar - 14 Mar	Aerolineas Argentinas	direct
27 Mar - 04 Apr	Aerolineas Argentinas	direct
18 Mar - 25 Mar	LATAM Airlines Group	direct
27 Mar - 30 Mar	GOL Linhas Aéreas
28 Mar - 05 Apr	GOL Linhas Aéreas
07 Mar - 15 Mar	Aerolineas Argentinas

Also check the deals for one-way flights from Porto Alegre to Buenos Aires in March.

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 Porto Alegre to Buenos Aires in March from 176€

Return flights