AirHint found the following cheapest return flights from Istanbul (IST) to Duesseldorf (DUS) in August 2025 (see full year).

Return flights

07 Aug - 13 Aug	Air Serbia
01 Aug - 29 Aug	Air Serbia
07 Aug - 12 Aug	Air Serbia
07 Aug - 20 Aug	Air Serbia
07 Aug - 15 Aug	Air Serbia
07 Aug - 11 Aug	Air Serbia
12 Aug - 15 Aug	Pegasus Airlines
07 Aug - 17 Aug	Pegasus Airlines
07 Aug - 14 Aug	Pegasus Airlines
05 Aug - 09 Aug	Air Serbia
28 Aug - 01 Sep	Pegasus Airlines
28 Aug - 04 Sep	Pegasus Airlines
30 Aug - 03 Sep	Pegasus Airlines	direct
01 Aug - 01 Sep	Air Serbia
29 Aug - 05 Sep	AJet
29 Aug - 02 Sep	AJet
30 Aug - 13 Sep	Pegasus Airlines	direct
28 Aug - 01 Sep	Pegasus Airlines	direct
28 Aug - 04 Sep	Pegasus Airlines	direct
29 Aug - 10 Sep	AJet

Also check the deals for one-way flights from Istanbul to Duesseldorf 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 Istanbul to Duesseldorf in August from 151€

Return flights