AirHint found the following cheapest return flights from Porto (OPO) to Buenos Aires (AEP) in July 2025 (see full year).

Return flights

28 Jul - 11 Aug	TAP
29 Jul - 05 Aug	Azul Airlines
30 Jul - 06 Aug	Azul Airlines
27 Jul - 11 Aug	TAP
30 Jul - 11 Aug	Azul Airlines
29 Jul - 11 Aug	TAP
29 Jul - 10 Aug	Azul Airlines
27 Jul - 02 Aug	SWISS
28 Jul - 02 Aug	SWISS
28 Jul - 06 Aug	SWISS

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

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 to Buenos Aires in July from 1406€

Return flights