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

Return flights

05 Dec - 28 Jan	TAP
02 Dec - 23 Jan	Iberia
06 Dec - 20 Jan	Iberia
06 Dec - 29 Jan	Iberia
02 Dec - 25 Jan	Iberia
05 Dec - 31 Jan	Iberia
05 Dec - 05 Jan	Iberia
10 Dec - 31 Jan	TAP
12 Dec - 24 Dec	Air Europa
06 Dec - 25 Dec	Iberia
09 Dec - 25 Dec	British Airways
03 Dec - 25 Dec	British Airways
04 Dec - 11 Dec	Iberia
02 Dec - 07 Jan	Iberia
08 Dec - 24 Dec	British Airways
14 Dec - 21 Jan	SWISS
13 Dec - 25 Dec	Air Europa
11 Dec - 29 Dec	TAP
02 Dec - 15 Dec	Air Europa
24 Dec - 31 Dec	Air Europa

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.

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Cheapest return flights from Sao Paulo to Porto in December from $666

Return flights