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

Return flights

21 Oct - 22 Nov	SWISS
28 Oct - 04 Nov	SWISS
19 Oct - 27 Nov	SWISS
21 Oct - 08 Nov	SWISS
21 Oct - 04 Nov	SWISS
20 Oct - 21 Nov	SWISS
06 Oct - 23 Oct	TAP
28 Oct - 15 Nov	SWISS
29 Oct - 15 Nov	SWISS
02 Oct - 16 Oct	TAP
07 Oct - 22 Oct	TAP
16 Oct - 23 Oct	TAP
07 Oct - 14 Oct	TAP
01 Oct - 09 Oct	TAP
07 Oct - 23 Oct	TAP
07 Oct - 24 Oct	TAP
06 Oct - 24 Oct	TAP
05 Oct - 02 Nov	Air Europa
11 Oct - 03 Nov	TAP
01 Oct - 11 Oct	TAP

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.

Book a cheap hotel in Porto

Cheap car rent in Porto

Cheapest return flights from Sao Paulo to Porto in October from $618

Return flights