AirHint found the following cheapest return flights from Porto (OPO) to Oslo (OSL) in January 2026 (see full year).

Return flights

26 Jan - 28 Jan	Ryanair
28 Jan - 04 Feb	Ryanair
29 Jan - 05 Feb	Ryanair
30 Jan - 22 Feb	Ryanair
28 Jan - 01 Feb	Ryanair
27 Jan - 31 Jan	Ryanair
25 Jan - 01 Feb	Ryanair
29 Jan - 01 Feb	Ryanair
30 Jan - 06 Feb	Ryanair
26 Jan - 14 Feb	Ryanair
28 Jan - 08 Feb	Vueling Airlines
28 Jan - 12 Feb	Vueling Airlines

Also check the deals for one-way flights from Porto to Oslo in January.

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 January from $138

Return flights