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

Return flights

23 Aug - 13 Sep	Air Serbia	direct
14 Aug - 21 Aug	SWISS
16 Aug - 02 Sep	Air Serbia	direct
16 Aug - 06 Sep	Air Serbia	direct
16 Aug - 07 Sep	Air Serbia
15 Aug - 06 Sep	Wizz Air Malta
09 Aug - 11 Aug	Air Serbia
09 Aug - 17 Aug	Air Serbia
19 Aug - 23 Aug	Air Serbia
19 Aug - 23 Aug	Air Serbia	direct
05 Aug - 09 Aug	Air Serbia	direct
05 Aug - 23 Aug	Air Serbia

Also check the deals for one-way flights from Frankfurt to Nis in August.

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 August from 168€

Return flights