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

Return flights

31 Jul - 17 Aug	Norwegian	direct
01 Jul - 08 Jul	Vueling Airlines
31 Jul - 14 Aug	Norwegian	direct
06 Jul - 08 Jul	Norwegian	direct
03 Jul - 08 Jul	Norwegian	direct
01 Jul - 08 Jul	Norwegian	direct
01 Jul - 02 Jul	Norwegian
03 Jul - 06 Jul	Norwegian	direct
31 Jul - 04 Aug	Norwegian
04 Jul - 08 Jul	Vueling Airlines
01 Jul - 06 Jul	Norwegian	direct
31 Jul - 13 Aug	Norwegian
04 Jul - 06 Jul	Vueling Airlines
31 Jul - 10 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 225€

Return flights