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

Return flights

30 Dec - 04 Jan	Air Serbia
28 Dec - 31 Dec	Turkish Airlines	direct
30 Dec - 04 Jan	Turkish Airlines	direct
28 Dec - 02 Jan	Turkish Airlines	direct
20 Dec - 27 Dec	Air Serbia
17 Dec - 22 Dec	Pegasus Airlines
13 Dec - 20 Dec	Air Serbia
20 Dec - 24 Dec	Pegasus Airlines
13 Dec - 20 Dec	Turkish Airlines	direct
24 Dec - 27 Dec	Air Serbia
16 Dec - 21 Dec	Air Serbia
20 Dec - 27 Dec	Turkish Airlines	direct
24 Dec - 27 Dec	Turkish Airlines	direct

Also check the deals for one-way flights from Istanbul 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 Istanbul to Ljubljana in December from 193€

Return flights