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

Return flights

05 Dec - 09 Dec	Air Serbia
04 Dec - 09 Dec	Air Serbia
12 Dec - 15 Dec	Air Serbia
06 Dec - 08 Dec	Air Serbia
08 Dec - 12 Dec	Air Serbia
08 Dec - 12 Dec	Turkish Airlines	direct
06 Dec - 08 Dec	Turkish Airlines	direct
05 Dec - 09 Dec	Turkish Airlines	direct
04 Dec - 09 Dec	Turkish Airlines	direct
23 Dec - 30 Dec	Air Serbia
26 Dec - 03 Jan	Air Serbia
17 Dec - 05 Jan	Air Serbia
18 Dec - 05 Jan	Turkish Airlines	direct
28 Dec - 04 Jan	Turkish Airlines	direct
25 Dec - 04 Jan	Air Serbia

Also check the deals for one-way flights from Ljubljana to Istanbul 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 Istanbul in December from 185€

Return flights