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

Return flights

29 Sep - 06 Oct	Air Europa
20 Sep - 27 Sep	Air Europa
23 Sep - 30 Sep	Air Europa
30 Sep - 13 Oct	TAP
22 Sep - 30 Sep	GOL Linhas Aéreas
16 Sep - 21 Oct	Azul Airlines
16 Sep - 22 Sep	Azul Airlines
17 Sep - 06 Oct	GOL Linhas Aéreas
16 Sep - 18 Oct	GOL Linhas Aéreas
16 Sep - 23 Oct	Azul Airlines
16 Sep - 23 Sep	Azul Airlines
16 Sep - 06 Oct	GOL Linhas Aéreas
16 Sep - 07 Oct	GOL Linhas Aéreas
25 Sep - 28 Sep	LATAM Airlines Group
04 Sep - 06 Sep	LATAM Airlines Group

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

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 September from 845€

Return flights