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

Return flights

05 May - 11 May	Vueling Airlines
01 May - 11 May	Norwegian	direct
08 May - 11 May	Vueling Airlines
08 May - 11 May	Norwegian	direct
01 May - 09 May	Norwegian
08 May - 15 May	Vueling Airlines
01 May - 10 May	Norwegian
09 May - 17 May	Iberia
02 May - 09 May	Iberia
01 May - 08 May	Norwegian

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

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 May from $129

Return flights