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

Return flights

12 Aug - 17 Aug	LATAM Airlines Group
23 Aug - 30 Aug	Azul Airlines
28 Aug - 15 Sep	GOL Linhas Aéreas
15 Aug - 22 Aug	Azul Airlines
15 Aug - 23 Aug	LATAM Airlines Group
15 Aug - 29 Aug	LATAM Airlines Group
01 Aug - 17 Aug	LATAM Airlines Group
11 Aug - 29 Aug	LATAM Airlines Group
26 Aug - 24 Sep	LATAM Airlines Group
08 Aug - 22 Aug	LATAM Airlines Group
02 Aug - 12 Aug	Azul Airlines
06 Aug - 13 Aug	LATAM Airlines Group
25 Aug - 27 Sep	LATAM Airlines Group
30 Aug - 27 Sep	LATAM Airlines Group

Also check the deals for one-way flights from Rio De Janeiro to Porto in August.

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 August from $1156

Return flights