Cheapest return flights from Porto to Oslo in September from $166

Best time to book flights for Porto (OPO) to Oslo (OSL) flights at AirHint

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

Return flights

12 Sep - 15 Sep easyJet
11 Sep - 15 Sep easyJet
15 Sep - 19 Sep TAP
16 Sep - 20 Sep TAP
16 Sep - 21 Sep TAP
17 Sep - 21 Sep TAP
17 Sep - 22 Sep TAP
19 Sep - 21 Sep TAP
18 Sep - 22 Sep TAP
16 Sep - 19 Sep TAP
24 Sep - 08 Oct Norwegian
24 Sep - 13 Oct Norwegian
24 Sep - 13 Oct Norwegian direct
24 Sep - 01 Oct Norwegian
18 Sep - 08 Oct Norwegian Air Sweden AOC
17 Sep - 01 Oct Norwegian
26 Sep - 08 Oct Norwegian
23 Sep - 08 Oct Norwegian Air Sweden AOC
24 Sep - 06 Oct Norwegian direct
26 Sep - 13 Oct Norwegian

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

Skyscanner

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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