AirHint found the following cheapest return flights from Frankfurt (FRA) to Nis (INI) in December 2025 (see full year).

Return flights

09 Dec - 13 Dec	Air Serbia	direct
02 Dec - 13 Dec	Air Serbia	direct
06 Dec - 13 Dec	Air Serbia	direct
09 Dec - 20 Dec	Air Serbia	direct
02 Dec - 20 Dec	Air Serbia	direct
06 Dec - 20 Dec	Air Serbia	direct
02 Dec - 06 Dec	Air Serbia	direct
02 Dec - 10 Dec	Air Serbia
16 Dec - 20 Dec	Air Serbia	direct
04 Dec - 06 Dec	Austrian Airlines
27 Dec - 10 Jan	Air Serbia
21 Dec - 04 Jan	Ryanair
21 Dec - 03 Jan	Ryanair
20 Dec - 03 Jan	Ryanair
27 Dec - 03 Jan	Air Serbia
26 Dec - 04 Jan	easyJet
19 Dec - 04 Jan	Ryanair

Also check the deals for one-way flights from Frankfurt to Nis 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 Frankfurt to Nis in December from 139€

Return flights