AirHint found the following cheapest return flights from Oslo (OSL) to Belgrade (BEG) in September 2026 (see full year).
Return flights
| 16 Sep - 21 Sep | Norwegian | direct | |
| 17 Sep - 21 Sep | Norwegian | ||
| 18 Sep - 21 Sep | airBaltic |
Also check the deals for one-way flights from Oslo to Belgrade in September.
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