Altius recorded 310 priced readings of nonstop business-class round trips from Washington (IAD) to Istanbul (IST) booked 90 days out, across 137 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$5,021 to US$9,621. Every fare Altius recorded for trips booked 90 days out stayed close enough to what this route typically costs that none was flagged.