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

Return flights

08 Dec - 25 Jan	Iberia
08 Dec - 21 Jan	Iberia
05 Dec - 28 Jan	Iberia
09 Dec - 26 Jan	Air Europa
09 Dec - 22 Jan	Air Europa
05 Dec - 31 Dec	Iberia
11 Dec - 21 Jan	Air Europa
11 Dec - 22 Jan	Air Europa
10 Dec - 19 Jan	Iberia
04 Dec - 29 Dec	TAP
11 Dec - 19 Jan	Air Europa
11 Dec - 20 Jan	Air Europa
01 Dec - 29 Dec	TAP
02 Dec - 07 Dec	Air Europa
03 Dec - 10 Dec	Iberia
01 Dec - 28 Dec	Iberia
01 Dec - 22 Dec	Air China
03 Dec - 12 Dec	Iberia
04 Dec - 11 Dec	Iberia
07 Dec - 28 Dec	Iberia

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

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 December from $639

Return flights