Altius recorded 253 priced readings of nonstop business-class round trips from Birmingham (BHX) to Istanbul (IST) booked 90 days out, across 121 departure dates between 2026-06-06 and 2026-10-04. Observed fares ran from US$1,020 to US$1,987. The lowest fare Altius scored on this window was US$1,022 for a 2026-09-29 departure, seen on 2026-07-01 — STRONG at the time, 19.3% below the US$1,266 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.