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
16 Sep - 06 Oct	British Airways
24 Sep - 15 Oct	Iberia
01 Sep - 30 Sep	Iberia
14 Sep - 27 Sep	Iberia
01 Sep - 15 Sep	Iberia
02 Sep - 01 Oct	Iberia
12 Sep - 24 Sep	Iberia
12 Sep - 10 Oct	Iberia
01 Sep - 16 Sep	Iberia
01 Sep - 19 Sep	Iberia
23 Sep - 28 Sep	Air Europa
24 Sep - 29 Sep	Air Europa

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 612€

Return flights