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

Return flights

22 Aug - 24 Aug	AJet
28 Aug - 10 Sep	Pegasus Airlines
28 Aug - 08 Sep	Pegasus Airlines
27 Aug - 28 Aug	AJet
26 Aug - 29 Aug	AJet
20 Aug - 27 Aug	AJet
26 Aug - 04 Sep	Pegasus Airlines
26 Aug - 10 Sep	Pegasus Airlines
22 Aug - 29 Aug	AJet
26 Aug - 06 Sep	Pegasus Airlines
28 Aug - 07 Sep	Pegasus Airlines
28 Aug - 31 Aug	Pegasus Airlines
27 Aug - 02 Sep	AJet
27 Aug - 03 Sep	AJet
26 Aug - 03 Sep	Pegasus Airlines
19 Aug - 27 Aug	Pegasus Airlines
20 Aug - 28 Aug	Turkish Airlines
19 Aug - 28 Aug	Turkish Airlines
27 Aug - 27 Aug	AJet
28 Aug - 11 Sep	Pegasus Airlines

Also check the deals for one-way flights from Istanbul to Frankfurt 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 Frankfurt in August from 175€

Return flights