Altius recorded 306 priced readings of nonstop business-class round trips from Chicago (ORD) to Zurich (ZRH) booked 30 days out, across 138 departure dates between 2026-05-20 and 2026-10-05. Observed fares ran from US$3,821 to US$10,266. The lowest fare Altius scored on this window was US$3,821 for a 2026-08-12 departure, seen on 2026-07-13 — STRONG at the time, 15% below the US$4,495 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.