AirHint found the following cheapest return flights from Porto (OPO) to Rio Negro (MDE) in December 2025 (see full year).

Return flights

13 Dec - 13 Jan	Iberia
06 Dec - 13 Dec	Azores Airlines
05 Dec - 14 Dec	Ryanair
23 Dec - 30 Dec	TAP
13 Dec - 11 Jan	Azores Airlines
08 Dec - 29 Dec	Air Europa
15 Dec - 04 Jan	TAP
14 Dec - 04 Jan	Azores Airlines
18 Dec - 04 Jan	Ryanair
25 Dec - 04 Jan	Air Transat
17 Dec - 03 Jan	Azores Airlines
21 Dec - 04 Jan	Ryanair

Also check the deals for one-way flights from Porto to Rio Negro 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 Rio Negro in December from $1008

Return flights