AirHint found the following cheapest one-way flights from Porto (OPO) to Oslo (OSL) in September 2026 (see full year).
One-Way flights
| 30 Sep | Ryanair | ||
| 30 Sep | Norwegian | direct | |
| 10 Sep | Norwegian Air Sweden AOC | ||
| 06 Sep | Norwegian Air Sweden AOC |
Also check the deals for return flights from Porto to Oslo in September.
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