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

Return flights

17 Oct - 20 Oct	Ryanair
08 Oct - 13 Oct	Norwegian	direct
08 Oct - 11 Oct	Norwegian
08 Oct - 18 Oct	Norwegian
17 Oct - 18 Oct	Norwegian
15 Oct - 20 Oct	Ryanair
18 Oct - 20 Oct	Ryanair
16 Oct - 20 Oct	Ryanair
23 Oct - 26 Oct	Ryanair
08 Oct - 20 Oct	Norwegian
31 Oct - 05 Nov	Ryanair
31 Oct - 03 Nov	Ryanair
17 Oct - 06 Nov	Norwegian
24 Oct - 13 Nov	Norwegian
25 Oct - 03 Nov	Vueling Airlines
22 Oct - 06 Nov	Norwegian
29 Oct - 13 Nov	Vueling Airlines
24 Oct - 06 Nov	Norwegian
22 Oct - 09 Nov	Norwegian
29 Oct - 16 Nov	Vueling Airlines

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

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 October from 118€

Return flights