Altius recorded 309 priced readings of nonstop business-class round trips from Chicago (ORD) to Istanbul (IST) booked 30 days out, across 137 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$5,101 to US$8,401. The lowest fare Altius scored on this window was US$5,101 for a 2026-11-02 departure, seen on 2026-10-03 — STRONG at the time, 21.5% below the US$6,498 this route was typically running that day.
Altius recorded 308 priced readings of nonstop business-class round trips from Chicago (ORD) to Istanbul (IST) booked 60 days out, across 137 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$5,101 to US$8,401. Every fare Altius recorded for trips booked 60 days out stayed close enough to what this route typically costs that none was flagged.
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.
A fare can move between our two readings of the same day, most often on the days furthest below typical. Where a day's two readings differ enough to matter, the chart marks that day and both readings can be read separately.