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

Return flights

19 Dec - 23 Dec	Air Serbia
15 Dec - 17 Dec	Air Serbia
08 Dec - 17 Dec	Air Serbia
08 Dec - 12 Dec	Air Serbia
29 Dec - 04 Jan	Air Serbia
30 Dec - 03 Jan	Air Serbia
05 Dec - 08 Dec	Air Serbia
04 Dec - 07 Dec	Air Serbia
07 Dec - 12 Dec	Aegean Airlines
17 Dec - 20 Dec	Air Serbia
05 Dec - 07 Dec	Air Serbia
29 Dec - 02 Jan	Air Serbia
31 Dec - 11 Jan	Air Serbia
27 Dec - 03 Jan	Air Serbia
26 Dec - 31 Dec	Aegean Airlines
31 Dec - 05 Jan	Air Serbia

Also check the deals for one-way flights from Thessaloniki 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 Thessaloniki to Ljubljana in December from $159

Return flights