AirHint found the following cheapest return flights from Istanbul (IST) to Oslo (OSL) in September 2026 (see full year).
Return flights
| 14 Sep - 13 Oct | KLM | ||
| 10 Sep - 01 Oct | Scandinavian Airlines | ||
| 16 Sep - 14 Oct | Scandinavian Airlines | ||
| 09 Sep - 11 Oct | LOT | ||
| 10 Sep - 01 Oct | Turkish Airlines | direct | |
| 09 Sep - 11 Oct | Turkish Airlines | direct |
Also check the deals for one-way flights from Istanbul to Oslo in September.
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