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

Return flights

10 Jul - 17 Jul	TAP
10 Jul - 23 Jul	TAP
10 Jul - 24 Jul	Ryanair
19 Jul - 26 Jul	Air Europa
16 Jul - 23 Jul	Azul Airlines
17 Jul - 24 Jul	Ryanair
11 Jul - 18 Jul	Ryanair
12 Jul - 19 Jul	Ryanair
19 Jul - 23 Jul	TAP
25 Jul - 31 Jul	Azul Airlines
11 Jul - 01 Aug	SWISS
21 Jul - 09 Aug	SWISS
17 Jul - 07 Aug	SWISS
19 Jul - 09 Aug	SWISS
18 Jul - 09 Aug	SWISS
20 Jul - 09 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 $1648

Return flights