Cheapest return flights from Chicago to Istanbul in October from 514€

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

Return flights

29 Oct - 04 Nov Austrian Airlines
08 Oct - 22 Oct Spirit Airlines
12 Oct - 22 Oct Austrian Airlines
02 Oct - 08 Oct Spirit Airlines
08 Oct - 16 Oct SWISS
11 Oct - 21 Oct Spirit Airlines
03 Oct - 08 Oct Frontier Airlines
18 Oct - 22 Oct Spirit Airlines
28 Oct - 04 Nov Frontier Airlines
07 Oct - 01 Nov Spirit Airlines
29 Oct - 22 Nov Frontier Airlines
31 Oct - 10 Nov SWISS
31 Oct - 14 Nov TAP
19 Oct - 08 Nov Spirit Airlines
31 Oct - 09 Nov LOT
08 Oct - 13 Oct SWISS
01 Oct - 10 Oct Spirit Airlines
13 Oct - 08 Nov Spirit Airlines
03 Oct - 23 Oct Spirit Airlines
06 Oct - 01 Nov Frontier Airlines

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

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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