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

Return flights

28 Oct - 19 Nov	Iberia
16 Oct - 13 Nov	Iberia
15 Oct - 30 Nov	Iberia
30 Oct - 10 Nov	LATAM Airlines Group
30 Oct - 12 Nov	Iberia
30 Oct - 13 Nov	Iberia
25 Oct - 13 Nov	Iberia
25 Oct - 10 Nov	LATAM Airlines Group
14 Oct - 11 Nov	Iberia
12 Oct - 12 Nov	Iberia
14 Oct - 25 Oct	TAP
25 Oct - 29 Oct	Air Europa
14 Oct - 19 Oct	TAP
03 Oct - 10 Oct	TAAG Angola Airlines
16 Oct - 30 Oct	TAP
20 Oct - 29 Oct	TAP
08 Oct - 28 Oct	TAAG Angola Airlines
10 Oct - 19 Oct	TAAG Angola Airlines
17 Oct - 29 Oct	TAP
21 Oct - 28 Oct	Air Europa

Also check the deals for one-way flights from Sao Paulo to Porto 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 Sao Paulo to Porto in October from 546€

Return flights