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

Return flights

29 Dec - 09 Jan	Air Europa
29 Dec - 05 Jan	Air Europa
25 Dec - 25 Jan	KLM
29 Dec - 19 Jan	Air Europa
24 Dec - 01 Jan	TAP
31 Dec - 20 Jan	TAP
25 Dec - 01 Jan	TAP
21 Dec - 16 Jan	Air Europa
28 Dec - 09 Jan	Air Europa
21 Dec - 12 Jan	Air Europa
23 Dec - 30 Dec	TAP
19 Dec - 23 Dec	GOL Linhas Aéreas
17 Dec - 30 Dec	TAP
16 Dec - 23 Dec	TAP
15 Dec - 22 Dec	TAP
17 Dec - 24 Dec	TAP
19 Dec - 26 Dec	TAP
16 Dec - 31 Dec	TAP
13 Dec - 17 Dec	TAP
21 Dec - 31 Dec	Azul Airlines

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 $1274

Return flights