AirHint found the following cheapest return flights from Porto (OPO) to Sao Paulo (GRU) in September 2026 (see full year).

Return flights

11 Sep - 23 Sep	Royal Air Maroc
10 Sep - 23 Sep	Royal Air Maroc
12 Sep - 18 Sep	Royal Air Maroc
12 Sep - 30 Sep	Royal Air Maroc
11 Sep - 14 Oct	Royal Air Maroc
12 Sep - 27 Sep	Royal Air Maroc
17 Sep - 30 Sep	Air Europa
12 Sep - 20 Sep	Royal Air Maroc
11 Sep - 27 Sep	Royal Air Maroc
18 Sep - 01 Oct	British Airways
20 Sep - 07 Oct	British Airways
18 Sep - 25 Sep	Royal Air Maroc
12 Sep - 28 Sep	Iberia
23 Sep - 06 Oct	Iberia
09 Sep - 07 Oct	Iberia
11 Sep - 26 Oct	Iberia
27 Sep - 07 Oct	Royal Air Maroc
24 Sep - 07 Oct	Royal Air Maroc
26 Sep - 03 Oct	British Airways
07 Sep - 07 Oct	Iberia

Also check the deals for one-way flights from Porto to Sao Paulo in September.

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 September from $658

Return flights