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

Return flights

06 Dec - 09 Dec	TAP
04 Dec - 07 Dec	TAP
17 Dec - 21 Dec	Ryanair
18 Dec - 23 Dec	Vueling Airlines
19 Dec - 23 Dec	Vueling Airlines
28 Dec - 02 Jan	TAP
19 Dec - 22 Dec	Ryanair
28 Dec - 31 Dec	Ryanair
18 Dec - 22 Dec	TAP
26 Dec - 29 Dec	Scandinavian Airlines
15 Dec - 19 Dec	KLM
27 Dec - 03 Jan	Lufthansa

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 161€

Return flights