AirHint found the following cheapest return flights from Naples (NAP) to Ljubljana (LJU) in December 2025 (see full year).

Return flights

05 Dec - 08 Dec	Air Serbia
12 Dec - 15 Dec	Air Serbia
04 Dec - 11 Dec	SWISS
08 Dec - 12 Dec	Brussels Airlines
12 Dec - 14 Dec	Lufthansa
04 Dec - 08 Dec	SWISS
05 Dec - 07 Dec	SWISS
23 Dec - 01 Jan	Vueling Airlines
23 Dec - 30 Dec	Vueling Airlines
23 Dec - 04 Jan	Vueling Airlines
10 Dec - 30 Dec	Vueling Airlines
24 Dec - 01 Jan	Vueling Airlines
24 Dec - 30 Dec	Vueling Airlines
31 Dec - 04 Jan	Vueling Airlines
24 Dec - 04 Jan	Vueling Airlines
28 Dec - 01 Jan	Vueling Airlines
29 Dec - 03 Jan	Lufthansa
28 Dec - 04 Jan	Vueling Airlines
30 Dec - 04 Jan	Lufthansa
27 Dec - 01 Jan	SWISS

Also check the deals for one-way flights from Naples to Ljubljana in December.

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 Ljubljana in December from $172

Return flights