AirHint found the following cheapest return flights from Belgrade (BEG) to Istanbul (SAW) in December 2025 (see full year).

Return flights

31 Dec - 05 Jan	Air Serbia
31 Dec - 03 Jan	Air Serbia
29 Dec - 06 Jan	Air Serbia
29 Dec - 01 Jan	Air Serbia
26 Dec - 03 Jan	Air Montenegro
26 Dec - 05 Jan	Air Serbia
27 Dec - 05 Jan	Air Montenegro
30 Dec - 08 Jan	Wizz Air
28 Dec - 03 Jan	Wizz Air
31 Dec - 06 Jan	Wizz Air
24 Dec - 27 Dec	Air Montenegro
24 Dec - 29 Dec	Air Montenegro
24 Dec - 28 Dec	Air Montenegro
26 Dec - 31 Dec	Air Montenegro
24 Dec - 31 Dec	Air Montenegro
25 Dec - 28 Dec	Air Serbia
26 Dec - 30 Dec	Air Montenegro
23 Dec - 28 Dec	Air Serbia
23 Dec - 29 Dec	Air Serbia
25 Dec - 26 Dec	Air Serbia

Also check the deals for one-way flights from Belgrade 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 Belgrade to Istanbul in December from $240

Return flights