AirHint found the following cheapest return flights from Warsaw (WMI) to Oslo (OSL) in September 2026 (see full year).
Return flights
| 04 Sep - 06 Sep | Ryanair | ||
| 17 Sep - 21 Sep | Ryanair | ||
| 05 Sep - 06 Sep | Ryanair | ||
| 01 Sep - 10 Sep | Ryanair | ||
| 08 Sep - 15 Sep | Ryanair | ||
| 10 Sep - 13 Sep | Ryanair | ||
| 21 Sep - 22 Sep | Wizz Air | ||
| 25 Sep - 29 Sep | Ryanair |
Also check the deals for one-way flights from Warsaw to Oslo in September.
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