Altius recorded 293 priced readings of nonstop business-class round trips from San Francisco (SFO) to Istanbul (IST) booked 60 days out, across 134 departure dates between 2026-05-20 and 2026-10-05. Observed fares ran from US$4,941 to US$10,841. The lowest fare Altius scored on this window was US$4,941 for a 2026-08-17 departure, seen on 2026-06-18 — RARE at the time, 41.3% below the US$8,417 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.