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

Return flights

03 Sep - 07 Sep	Wizz Air
04 Sep - 07 Sep	Wizz Air
02 Sep - 05 Sep	Wizz Air
01 Sep - 03 Sep	Wizz Air
01 Sep - 07 Sep	Wizz Air
10 Sep - 14 Sep	Wizz Air
06 Sep - 14 Sep	Wizz Air
10 Sep - 22 Sep	Norwegian
02 Sep - 09 Sep	Norwegian
13 Sep - 15 Sep	Vueling Airlines
26 Sep - 08 Oct	Norwegian
18 Sep - 08 Oct	Norwegian
17 Sep - 07 Oct	Vueling Airlines
26 Sep - 13 Oct	Norwegian	direct
26 Sep - 15 Oct	Norwegian
30 Sep - 20 Oct	Norwegian Air Sweden AOC
26 Sep - 11 Oct	Norwegian
17 Sep - 07 Oct	Norwegian	direct
26 Sep - 07 Oct	Norwegian	direct
18 Sep - 07 Oct	Norwegian	direct

Also check the deals for one-way flights from Rome 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 Rome to Oslo in September from $137

Return flights