AirHint found the following cheapest return flights from Frankfurt (FRA) to Istanbul (IST) in August 2026 (see full year).

Return flights

26 Aug - 24 Sep	AJet	direct
30 Aug - 30 Sep	AJet	direct
17 Aug - 23 Sep	Wizz Air Malta
17 Aug - 23 Sep	Turkish Airlines	direct
22 Aug - 29 Aug	AJet
03 Aug - 10 Sep	Air Serbia
01 Aug - 10 Sep	Air Serbia
27 Aug - 15 Sep	Air Serbia
03 Aug - 11 Sep	Air Serbia
05 Aug - 01 Sep	Air Serbia
24 Aug - 05 Sep	Air Serbia
04 Aug - 19 Aug	TAROM
19 Aug - 23 Aug	AJet
21 Aug - 29 Aug	AJet
10 Aug - 12 Aug	AJet
01 Aug - 06 Aug	Air Serbia
05 Aug - 10 Aug	Air Serbia
14 Aug - 17 Aug	Air Serbia
10 Aug - 20 Aug	Air Serbia
05 Aug - 24 Aug	Air Serbia

Also check the deals for one-way flights from Frankfurt to Istanbul 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 Istanbul in August from $145

Return flights