Cheapest return flights from Chicago to Istanbul in October from 503€

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

Return flights

15 Oct - 22 Oct Icelandair
06 Oct - 22 Oct Spirit Airlines
08 Oct - 15 Oct Icelandair
02 Oct - 16 Oct Spirit Airlines
05 Oct - 12 Oct Spirit Airlines
04 Oct - 12 Oct Icelandair
01 Oct - 10 Oct Icelandair
06 Oct - 11 Oct Spirit Airlines
06 Oct - 12 Oct Icelandair
06 Oct - 10 Oct Spirit Airlines
29 Oct - 12 Nov Lufthansa
29 Oct - 12 Nov Turkish Airlines direct

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

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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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