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

Return flights

31 Dec - 05 Jan	Ryanair
21 Dec - 31 Dec	Ryanair
10 Dec - 13 Dec	Ryanair
10 Dec - 12 Dec	Ryanair
22 Dec - 31 Dec	Ryanair
31 Dec - 04 Jan	Ryanair
17 Dec - 30 Dec	Ryanair
21 Dec - 30 Dec	Ryanair
26 Dec - 31 Dec	Ryanair
09 Dec - 12 Dec	Ryanair
21 Dec - 03 Jan	Ryanair
13 Dec - 15 Dec	Ryanair
20 Dec - 30 Dec	Ryanair
29 Dec - 02 Jan	Ryanair
26 Dec - 03 Jan	Ryanair
27 Dec - 02 Jan	Ryanair
30 Dec - 02 Jan	Ryanair
24 Dec - 01 Jan	Vueling Airlines
27 Dec - 01 Jan	Ryanair
29 Dec - 05 Jan	Scandinavian 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 $171

Return flights