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

Return flights

15 Oct - 28 Oct	Air Europa
15 Oct - 30 Oct	Air Europa
24 Oct - 22 Nov	Air Europa
14 Oct - 04 Nov	TAP
23 Oct - 21 Nov	TAP
30 Oct - 06 Nov	TAP
16 Oct - 23 Oct	Air Europa
14 Oct - 29 Oct	Air Europa
24 Oct - 21 Nov	Air Europa
27 Oct - 09 Nov	Air Europa
27 Oct - 27 Nov	Air Europa
16 Oct - 19 Oct	Air Europa
29 Oct - 15 Nov	Air Europa
27 Oct - 13 Nov	Air Europa
29 Oct - 08 Nov	Air Europa
14 Oct - 31 Oct	TAP
09 Oct - 17 Oct	TAP
17 Oct - 31 Oct	Royal Air Maroc
08 Oct - 21 Oct	Air Europa
05 Oct - 19 Oct	Royal Air Maroc

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

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 October from $613

Return flights