AirHint found the following cheapest return flights from Porto (OPO) to Sao Paulo (GRU) in August 2025 (see full year).

Return flights

27 Aug - 27 Sep	TAP
26 Aug - 25 Sep	TAP
19 Aug - 26 Aug	TAP
19 Aug - 27 Sep	TAP
30 Aug - 19 Sep	TAP
15 Aug - 22 Aug	TAP
10 Aug - 21 Aug	TAP
16 Aug - 23 Aug	TAP
16 Aug - 19 Aug	TAP
15 Aug - 26 Aug	TAP
31 Aug - 20 Sep	TAP
11 Aug - 18 Aug	TAP
26 Aug - 26 Sep	Air Europa
21 Aug - 31 Aug	TAP
26 Aug - 31 Aug	TAP
15 Aug - 23 Sep	TAP
11 Aug - 26 Aug	TAP
26 Aug - 16 Sep	Air Europa
25 Aug - 15 Sep	Air Europa
24 Aug - 15 Sep	Air Europa

Also check the deals for one-way flights from Porto to Sao Paulo 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 Sao Paulo in August from $678

Return flights