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

Return flights

12 Aug - 19 Aug	TAP
21 Aug - 05 Sep	TAP
19 Aug - 26 Aug	TAP
26 Aug - 28 Aug	Norwegian
17 Aug - 21 Aug	Iberia
03 Aug - 07 Aug	Ryanair
13 Aug - 25 Aug	Smart Wings
04 Aug - 07 Aug	Ryanair
01 Aug - 08 Aug	Iberia
01 Aug - 07 Aug	airBaltic
17 Aug - 19 Aug	Norwegian
26 Aug - 05 Sep	Norwegian
26 Aug - 12 Sep	Norwegian
19 Aug - 05 Sep	Norwegian
17 Aug - 05 Sep	Norwegian

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

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 August from 146€

Return flights