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

Return flights

01 Dec - 04 Dec	Ryanair
10 Dec - 13 Dec	Ryanair
06 Dec - 08 Dec	Ryanair
03 Dec - 07 Dec	Ryanair
01 Dec - 08 Dec	Ryanair
08 Dec - 11 Dec	Ryanair
31 Dec - 03 Jan	Ryanair
06 Dec - 09 Dec	Vueling Airlines
14 Dec - 17 Dec	Ryanair
19 Dec - 06 Jan	Ryanair
04 Dec - 07 Dec	Wizz Air Malta
04 Dec - 08 Dec	Ryanair
26 Dec - 02 Jan	Ryanair
25 Dec - 01 Jan	KLM
27 Dec - 02 Jan	Ryanair
30 Dec - 03 Jan	Ryanair

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 123€

Return flights