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
31 Dec - 02 Jan	Ryanair
28 Dec - 02 Jan	Ryanair
30 Dec - 06 Jan	Ryanair
28 Dec - 04 Jan	Ryanair
30 Dec - 04 Jan	Ryanair
28 Dec - 31 Dec	Ryanair
27 Dec - 31 Dec	Vueling Airlines
27 Dec - 02 Jan	easyJet
27 Dec - 30 Dec	Ryanair
31 Dec - 11 Jan	Vueling Airlines
27 Dec - 01 Jan	easyJet
27 Dec - 29 Dec	easyJet
28 Dec - 30 Dec	Wizz Air
31 Dec - 18 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 143€

Return flights