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

Return flights

18 Sep - 21 Sep	Ryanair
10 Sep - 21 Sep	Ryanair
19 Sep - 21 Sep	Ryanair
04 Sep - 07 Sep	Ryanair
08 Sep - 10 Sep	Air Serbia
19 Sep - 22 Sep	Ryanair
05 Sep - 08 Sep	Air Serbia
01 Sep - 05 Sep	Ryanair
08 Sep - 19 Sep	SWISS
01 Sep - 03 Sep	Air Serbia

Also check the deals for one-way flights from Naples to Belgrade 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 Belgrade in September from 119€

Return flights