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

Return flights

01 Jul - 03 Jul	Ryanair
08 Jul - 28 Jul	Ryanair
02 Jul - 09 Jul	TAROM
15 Jul - 25 Jul	TAROM
27 Jul - 25 Aug	TAROM
29 Jul - 26 Aug	TAROM
01 Jul - 05 Jul	Ryanair
31 Jul - 31 Aug	TAROM
15 Jul - 17 Jul	Air Serbia
15 Jul - 19 Jul	Air Serbia
13 Jul - 23 Jul	Air Serbia
03 Jul - 31 Jul	Air Serbia
13 Jul - 17 Jul	Air Serbia
16 Jul - 14 Aug	Air Serbia
20 Jul - 09 Aug	Air Serbia
27 Jul - 09 Aug	Air Serbia
03 Jul - 02 Aug	Air Serbia
25 Jul - 09 Aug	Air Serbia
22 Jul - 06 Aug	Air Serbia
27 Jul - 05 Aug	Air Serbia

Also check the deals for one-way flights from Frankfurt to Istanbul in July.

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 July from 155€

Return flights