AirHint found the following cheapest return flights from Rio De Janeiro (GIG) to Porto (OPO) in September 2025 (see full year).

Return flights

18 Sep - 25 Sep	British Airways
24 Sep - 07 Oct	Air France
24 Sep - 10 Oct	Iberia
23 Sep - 23 Oct	British Airways
26 Sep - 05 Oct	Iberia
29 Sep - 17 Oct	British Airways
30 Sep - 20 Oct	Iberia
22 Sep - 17 Oct	British Airways
16 Sep - 28 Oct	Iberia
28 Sep - 11 Oct	British Airways
29 Sep - 07 Oct	British Airways
12 Sep - 28 Sep	Iberia
10 Sep - 16 Sep	Avianca
18 Sep - 24 Sep	KLM
18 Sep - 23 Sep	TAP
19 Sep - 22 Sep	GOL Linhas Aéreas
15 Sep - 25 Sep	Air France
01 Sep - 08 Sep	GOL Linhas Aéreas
02 Sep - 09 Sep	GOL Linhas Aéreas
01 Sep - 24 Sep	KLM

Also check the deals for one-way flights from Rio De Janeiro 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 Rio De Janeiro to Porto in September from $935

Return flights