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

Return flights

11 Sep - 15 Sep	Ryanair
18 Sep - 23 Sep	Ryanair
05 Sep - 22 Sep	Air Serbia
18 Sep - 24 Sep	Ryanair
16 Sep - 23 Sep	Ryanair
12 Sep - 15 Sep	Norwegian
12 Sep - 16 Sep	Norwegian
18 Sep - 21 Sep	Ryanair
25 Sep - 28 Sep	Ryanair
11 Sep - 14 Sep	Ryanair
26 Sep - 13 Oct	Norwegian
17 Sep - 06 Oct	Vueling Airlines
19 Sep - 06 Oct	Norwegian
26 Sep - 11 Oct	Norwegian
29 Sep - 03 Oct	Ryanair
26 Sep - 06 Oct	Norwegian
26 Sep - 13 Oct	Norwegian	direct
24 Sep - 13 Oct	Norwegian Air Sweden AOC
24 Sep - 11 Oct	Norwegian Air Sweden AOC
19 Sep - 06 Oct	Norwegian	direct

Also check the deals for one-way flights from Naples 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 Naples to Oslo in September from 133€

Return flights