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

Return flights

24 Dec - 31 Dec	SWISS
14 Dec - 18 Dec	Aegean Airlines
03 Dec - 07 Dec	Air Serbia
12 Dec - 16 Dec	Lufthansa
18 Dec - 22 Dec	SWISS
31 Dec - 07 Jan	SWISS
12 Dec - 14 Dec	Lufthansa
11 Dec - 14 Dec	Lufthansa
17 Dec - 20 Dec	SWISS
22 Dec - 26 Dec	Air Serbia
26 Dec - 31 Dec	Lufthansa
27 Dec - 05 Jan	SWISS
26 Dec - 01 Jan	Wizz Air
29 Dec - 05 Jan	SWISS
30 Dec - 05 Jan	Ryanair
30 Dec - 04 Jan	Wizz Air Malta
29 Dec - 02 Jan	Lufthansa
28 Dec - 01 Jan	easyJet
27 Dec - 02 Jan	SWISS
31 Dec - 02 Jan	SWISS

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 172€

Return flights