Altius recorded 277 priced readings of nonstop business-class round trips from San Francisco (SFO) to Istanbul (IST) booked 30 days out, across 127 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$4,991 to US$12,116. The lowest fare Altius scored on this window was US$4,991 for a 2026-07-09 departure, seen on 2026-06-09 — RARE at the time, 34.7% below the US$7,643 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.