Cheapest return flights from Chicago to Istanbul in October from 556€

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

Return flights

22 Oct - 15 Nov Frontier Airlines
29 Oct - 12 Nov Frontier Airlines
29 Oct - 22 Nov Frontier Airlines
20 Oct - 05 Nov Lufthansa
27 Oct - 22 Nov Spirit Airlines
24 Oct - 15 Nov TAP
23 Oct - 15 Nov Spirit Airlines
23 Oct - 11 Nov TAP
22 Oct - 03 Nov Frontier Airlines
21 Oct - 21 Nov Spirit Airlines
22 Oct - 27 Oct Frontier Airlines
18 Oct - 26 Oct Spirit Airlines
18 Oct - 27 Oct Spirit Airlines
19 Oct - 27 Oct Spirit Airlines
24 Oct - 30 Oct TAP
21 Oct - 27 Oct Spirit Airlines
20 Oct - 27 Oct Frontier Airlines
24 Oct - 30 Oct Turkish Airlines direct
20 Oct - 27 Oct Turkish Airlines direct
18 Oct - 27 Oct Turkish Airlines direct

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

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