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

Return flights

08 Dec - 15 Dec	Air Serbia
15 Dec - 17 Dec	Air Europa
16 Dec - 06 Jan	Lufthansa
10 Dec - 13 Dec	Ryanair
12 Dec - 14 Dec	SWISS
29 Dec - 07 Jan	Lufthansa
16 Dec - 22 Dec	Iberia Express
14 Dec - 18 Dec	Air Serbia
10 Dec - 12 Dec	Ryanair
09 Dec - 13 Dec	Ryanair
12 Dec - 15 Dec	SWISS
11 Dec - 15 Dec	Lufthansa
27 Dec - 03 Jan	Air Serbia
29 Dec - 02 Jan	Air Serbia
19 Dec - 06 Jan	Ryanair
31 Dec - 05 Jan	Air Europa
29 Dec - 04 Jan	Air Serbia
26 Dec - 02 Jan	Wizz Air Malta
30 Dec - 04 Jan	Iberia

Also check the deals for one-way flights from Madrid 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 Madrid to Ljubljana in December from 191€

Return flights