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

Return flights

11 Dec - 15 Dec	Ryanair
08 Dec - 15 Dec	Ryanair
12 Dec - 15 Dec	Scandinavian Airlines
08 Dec - 14 Dec	Ryanair
11 Dec - 14 Dec	Ryanair
10 Dec - 17 Dec	Ryanair
17 Dec - 03 Jan	Ryanair
24 Dec - 31 Dec	Ryanair
07 Dec - 10 Dec	Ryanair
14 Dec - 17 Dec	Ryanair
07 Dec - 12 Dec	Ryanair
25 Dec - 23 Jan	Air Europa
25 Dec - 02 Jan	Air Europa
30 Dec - 02 Jan	Ryanair
30 Dec - 04 Jan	Wizz Air
24 Dec - 01 Jan	Vueling Airlines
13 Dec - 01 Jan	Vueling Airlines
17 Dec - 01 Jan	Vueling Airlines
21 Dec - 01 Jan	Vueling Airlines
31 Dec - 15 Jan	Vueling Airlines

Also check the deals for one-way flights from Porto to Oslo 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 Oslo in December from 134€

Return flights