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

Return flights

19 Aug - 26 Aug	Ryanair
23 Aug - 26 Aug	Air Serbia
24 Aug - 27 Aug	Ryanair
15 Aug - 22 Aug	Ryanair
14 Aug - 18 Aug	SWISS
23 Aug - 26 Aug	Air Serbia	direct
01 Aug - 08 Aug	Austrian Airlines
04 Aug - 13 Aug	Ryanair

Also check the deals for one-way flights from Cologne 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 Cologne to Nis in August from 187€

Return flights