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

Return flights

11 Aug - 19 Aug	Ethiopian Airlines
12 Aug - 02 Sep	Ethiopian Airlines
16 Aug - 30 Aug	Ethiopian Airlines
09 Aug - 14 Aug	Ethiopian Airlines
09 Aug - 16 Aug	Ethiopian Airlines
31 Aug - 17 Sep	TAP
29 Aug - 17 Sep	KLM
14 Aug - 21 Aug	KLM
30 Aug - 17 Sep	KLM
29 Aug - 14 Sep	Azul Airlines
13 Aug - 20 Aug	KLM
13 Aug - 21 Aug	Ryanair
17 Aug - 30 Aug	Iberia
15 Aug - 29 Aug	Iberia
02 Aug - 09 Aug	Ethiopian Airlines
31 Aug - 12 Sep	Air France
16 Aug - 01 Sep	Iberia
30 Aug - 06 Sep	Air Europa

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

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 August from 886€

Return flights