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

Return flights

24 Jul - 31 Jul	Norwegian
24 Jul - 05 Aug	Norwegian
24 Jul - 31 Jul	Norwegian	direct
22 Jul - 05 Aug	Norwegian
24 Jul - 05 Aug	Norwegian	direct
24 Jul - 03 Aug	Norwegian	direct
22 Jul - 31 Jul	Norwegian	direct
22 Jul - 05 Aug	Norwegian	direct
22 Jul - 03 Aug	Norwegian	direct

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

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 Oslo to Porto in July from 209€

Return flights