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

Return flights

25 Aug - 09 Sep	Icelandair
19 Aug - 27 Aug	Spirit Airlines
11 Aug - 21 Aug	Spirit Airlines
16 Aug - 29 Aug	Spirit Airlines
20 Aug - 31 Aug	Spirit Airlines
18 Aug - 26 Aug	Spirit Airlines
21 Aug - 30 Aug	Spirit Airlines
05 Aug - 21 Aug	Spirit Airlines
07 Aug - 02 Sep	Spirit Airlines
07 Aug - 21 Aug	Spirit Airlines
11 Aug - 22 Aug	Spirit Airlines
11 Aug - 19 Aug	Spirit Airlines
07 Aug - 02 Sep	Turkish Airlines	direct

Also check the deals for one-way flights from Detroit 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 Detroit to Istanbul in August from 587€

Return flights