Cheapest return flights from Chicago to Istanbul in September from $974

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

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

Return flights

03 Sep - 18 Sep Delta
08 Sep - 18 Sep Delta
08 Sep - 19 Sep Delta
08 Sep - 20 Sep Delta
07 Sep - 20 Sep Delta
10 Sep - 15 Sep Delta
05 Sep - 08 Sep Delta
24 Sep - 04 Oct Delta
10 Sep - 17 Sep Air France
14 Sep - 30 Sep Air France
18 Sep - 04 Oct Delta
19 Sep - 26 Sep Air France

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.

Book a cheap hotel in Istanbul

Cheap car rent in Istanbul