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

Return flights

08 Dec - 14 Dec	TAP
08 Dec - 16 Dec	KLM
29 Dec - 19 Jan	Ethiopian Airlines
11 Dec - 15 Dec	Ethiopian Airlines
10 Dec - 16 Dec	KLM
09 Dec - 16 Dec	KLM
31 Dec - 30 Jan	Air Europa
08 Dec - 22 Jan	TAP
30 Dec - 30 Jan	Ethiopian Airlines
24 Dec - 27 Jan	Air France
25 Dec - 27 Jan	Air France
29 Dec - 22 Jan	TAP
10 Dec - 14 Dec	KLM
24 Dec - 26 Jan	Iberia
26 Dec - 26 Jan	Iberia
26 Dec - 27 Jan	TAP
08 Dec - 17 Dec	TAP
08 Dec - 31 Dec	TAP
11 Dec - 22 Dec	Ethiopian Airlines
07 Dec - 09 Dec	TAP

Also check the deals for one-way flights from Porto to Sao Paulo 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 Porto to Sao Paulo in December from $641

Return flights