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

Return flights

22 Oct - 03 Nov	Ryanair
31 Oct - 05 Nov	Ryanair
30 Oct - 31 Oct	Ryanair
30 Oct - 03 Nov	TAP
31 Oct - 04 Nov	Ryanair
28 Oct - 30 Oct	Ryanair
23 Oct - 26 Oct	easyJet
31 Oct - 02 Nov	Ryanair
24 Oct - 27 Oct	Norwegian
27 Oct - 30 Oct	Ryanair
25 Oct - 28 Oct	Ryanair
24 Oct - 26 Oct	Norwegian
23 Oct - 30 Oct	Ryanair
22 Oct - 24 Oct	Ryanair
26 Oct - 02 Nov	Wizz Air
25 Oct - 27 Oct	Ryanair
24 Oct - 13 Nov	Norwegian
24 Oct - 02 Nov	Norwegian
29 Oct - 16 Nov	Vueling Airlines
22 Oct - 02 Nov	Norwegian

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 $216

Return flights