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

Return flights

14 Dec - 16 Dec	Ryanair
03 Dec - 07 Dec	SWISS
15 Dec - 22 Jan	Ryanair
13 Dec - 06 Jan	Ryanair
18 Dec - 09 Jan	Aer Lingus
05 Dec - 08 Dec	Lufthansa
18 Dec - 21 Dec	Aer Lingus
17 Dec - 19 Dec	Ryanair
18 Dec - 20 Dec	Aer Lingus
18 Dec - 19 Dec	Aer Lingus
15 Dec - 29 Dec	Ryanair
27 Dec - 31 Dec	Ryanair
25 Dec - 01 Jan	Scandinavian Airlines
22 Dec - 04 Jan	Ryanair
27 Dec - 01 Jan	Ryanair
28 Dec - 31 Dec	Ryanair
31 Dec - 03 Jan	Ryanair
28 Dec - 02 Jan	Ryanair
22 Dec - 03 Jan	Ryanair
28 Dec - 03 Jan	Ryanair

Also check the deals for one-way flights from Dublin 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 Dublin to Ljubljana in December from 164€

Return flights