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

Return flights

08 Dec - 12 Dec	Air Serbia
10 Dec - 14 Dec	Air Serbia
26 Dec - 02 Jan	Air Serbia
27 Dec - 04 Jan	Air Serbia
29 Dec - 02 Jan	Air Serbia
19 Dec - 29 Dec	Aegean Airlines	direct
08 Dec - 12 Dec	Aegean Airlines	direct
27 Dec - 31 Dec	Air Serbia
26 Dec - 02 Jan	Aegean Airlines	direct
29 Dec - 02 Jan	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.

Book a cheap hotel in Athens

Cheap car rent in Athens

Cheapest return flights from Ljubljana to Athens in December from 144€

Return flights