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

Return flights

08 Dec - 07 Jan	Air Serbia
22 Dec - 26 Dec	Air Serbia
08 Dec - 12 Dec	Air Serbia
12 Dec - 15 Dec	Air Serbia
18 Dec - 23 Dec	Air Serbia
04 Dec - 07 Dec	Air Serbia
22 Dec - 02 Jan	Air Serbia
25 Dec - 02 Jan	Air Serbia
25 Dec - 01 Jan	Air Serbia
26 Dec - 02 Jan	Air Serbia
26 Dec - 01 Jan	Air Serbia
22 Dec - 04 Jan	Air Serbia
30 Dec - 04 Jan	Air Serbia
27 Dec - 02 Jan	Air Serbia
26 Dec - 04 Jan	Air Serbia
08 Dec - 12 Dec	Aegean Airlines	direct
12 Dec - 15 Dec	Aegean Airlines	direct
22 Dec - 26 Dec	Aegean Airlines	direct

Also check the deals for one-way flights from Ljubljana to Athens 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 Ljubljana to Athens in December from 147€

Return flights