AirHint found the following cheapest return flights from Oslo (OSL) to Athens (ATH) in September 2026 (see full year).
Return flights
| 01 Sep - 08 Sep | LOT | ||
| 28 Sep - 08 Oct | LOT | ||
| 17 Sep - 24 Sep | LOT | ||
| 04 Sep - 06 Sep | Air Serbia | ||
| 28 Sep - 08 Oct | Aegean Airlines | direct | |
| 28 Sep - 12 Oct | Transavia France |
Also check the deals for one-way flights from Oslo to Athens in September.
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