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

Return flights

07 Dec - 10 Dec	Vueling Airlines
07 Dec - 12 Dec	Vueling Airlines
23 Dec - 31 Dec	SWISS
24 Dec - 31 Dec	SWISS
06 Dec - 12 Dec	Wizz Air
13 Dec - 14 Dec	Air Serbia
19 Dec - 11 Jan	Vueling Airlines
25 Dec - 31 Dec	SWISS
08 Dec - 12 Dec	Air Serbia
16 Dec - 23 Dec	SWISS
12 Dec - 14 Dec	SWISS
23 Dec - 01 Jan	Wizz Air Malta
24 Dec - 01 Jan	SWISS
25 Dec - 01 Jan	SWISS
25 Dec - 02 Jan	Lufthansa
31 Dec - 06 Jan	SWISS
30 Dec - 05 Jan	Wizz Air Malta
28 Dec - 04 Jan	easyJet
26 Dec - 01 Jan	Wizz Air
29 Dec - 04 Jan	easyJet

Also check the deals for one-way flights from Rome 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 Rome to Ljubljana in December from 170€

Return flights