AirHint found the following cheapest return flights from Nis (INI) to Istanbul (IST) in May 2026 (see full year).

Return flights

23 May - 26 May	Air Serbia	direct
09 May - 12 May	Air Serbia	direct
02 May - 05 May	Air Serbia	direct
30 May - 02 Jun	Air Serbia	direct
05 May - 08 May	Air Serbia
12 May - 15 May	Air Serbia
26 May - 29 May	Air Serbia

Also check the deals for one-way flights from Nis to Istanbul in May.

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 Nis to Istanbul in May from 147€

Return flights