Cheapest return flights from Chicago to Istanbul in September from $644

Best time to book flights for Chicago (ORD) to Istanbul (IST) flights at AirHint

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

Return flights

29 Sep - 06 Oct Scandinavian Airlines
02 Sep - 20 Oct Icelandair
17 Sep - 01 Oct Spirit Airlines
25 Sep - 07 Oct Spirit Airlines
30 Sep - 07 Oct Icelandair
02 Sep - 19 Oct Icelandair
20 Sep - 04 Oct Spirit Airlines
01 Sep - 15 Oct Icelandair
02 Sep - 04 Sep Icelandair
29 Sep - 14 Oct Etihad Airways
23 Sep - 07 Oct Etihad Airways
23 Sep - 30 Sep Icelandair
23 Sep - 30 Sep Turkish Airlines direct
02 Sep - 04 Sep Turkish Airlines direct

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

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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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