Cheapest return flights from Chicago to Istanbul in September from 511€

AirHint found the following cheapest return flights from Chicago (ORD) to Istanbul (IST) in September 2025 (see full year).

Return flights

09 Sep - 16 Sep Icelandair
05 Sep - 19 Sep Icelandair
20 Sep - 20 Oct Spirit Airlines
24 Sep - 06 Oct Spirit Airlines
01 Sep - 05 Sep Icelandair
16 Sep - 03 Oct Spirit Airlines
27 Sep - 04 Oct Spirit Airlines
18 Sep - 25 Sep Spirit Airlines
14 Sep - 15 Oct Frontier Airlines
22 Sep - 30 Sep Icelandair
17 Sep - 24 Sep Spirit Airlines
15 Sep - 25 Sep Spirit Airlines
30 Sep - 05 Oct Spirit Airlines
17 Sep - 01 Oct Spirit Airlines
06 Sep - 20 Sep Icelandair
15 Sep - 30 Sep Spirit Airlines
18 Sep - 29 Sep Spirit Airlines
17 Sep - 01 Oct Turkish Airlines direct
01 Sep - 01 Oct Icelandair
20 Sep - 20 Oct Turkish Airlines direct

Also check the deals for one-way flights from Chicago to Istanbul in September.

Skyscanner

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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