AirHint found the following cheapest return flights from Belgrade (BEG) to Oslo (OSL) in September 2025 (see full year).

Return flights

27 Sep - 06 Oct	Norwegian	direct
27 Sep - 18 Oct	Norwegian	direct
27 Sep - 15 Oct	Norwegian	direct
27 Sep - 08 Oct	Norwegian	direct
29 Sep - 30 Sep	Norwegian
27 Sep - 01 Oct	Norwegian	direct
24 Sep - 01 Oct	Wizz Air
29 Sep - 02 Oct	Norwegian
27 Sep - 11 Oct	Norwegian	direct
27 Sep - 30 Sep	Air Serbia
22 Sep - 06 Oct	Norwegian	direct
22 Sep - 08 Oct	Norwegian	direct
22 Sep - 23 Sep	Air Serbia
25 Sep - 28 Sep	Air Serbia
28 Sep - 29 Sep	Wizz Air
22 Sep - 24 Sep	Air Serbia
26 Sep - 29 Sep	Air Serbia
22 Sep - 24 Sep	Norwegian	direct
21 Sep - 23 Sep	Air Serbia
22 Sep - 27 Sep	Norwegian

Also check the deals for one-way flights from Belgrade to Oslo in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Belgrade to Oslo in September from $140

Return flights