Altius recorded 310 priced readings of nonstop business-class round trips from Chicago (ORD) to Istanbul (IST) booked 90 days out, across 138 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$5,101 to US$7,101. Every fare Altius recorded for trips booked 90 days out stayed close enough to what this route typically costs that none was flagged.