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

Return flights

30 Jul - 29 Aug	Ryanair
31 Jul - 07 Aug	Ryanair
21 Jul - 25 Jul	KLM
28 Jul - 01 Aug	Ryanair
25 Jul - 04 Aug	KLM
25 Jul - 06 Aug	KLM
23 Jul - 27 Jul	KLM
25 Jul - 01 Aug	KLM
24 Jul - 27 Jul	Lufthansa
23 Jul - 25 Jul	Ryanair
24 Jul - 03 Aug	KLM
23 Jul - 13 Aug	Norwegian	direct
23 Jul - 11 Aug	Norwegian	direct
25 Jul - 28 Jul	Ryanair
26 Jul - 30 Jul	Ryanair
24 Jul - 31 Jul	easyJet
23 Jul - 06 Aug	Norwegian	direct
23 Jul - 28 Jul	Norwegian	direct
23 Jul - 30 Jul	Norwegian	direct
23 Jul - 26 Jul	Norwegian

Also check the deals for one-way flights from Porto to Oslo 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 Porto to Oslo in July from 330€

Return flights