Altius recorded 300 priced readings of nonstop business-class round trips from San Francisco (SFO) to Istanbul (IST) booked 90 days out, across 136 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$5,391 to US$10,591. The lowest fare Altius scored on this window was US$5,391 for a 2026-08-24 departure, seen on 2026-05-26 — RARE at the time, 38.3% below the US$8,737 this route was typically running that day.
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.