Altius recorded 305 priced readings of nonstop business-class round trips from Chicago (ORD) to Amsterdam (AMS) booked 60 days out, across 136 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$3,761 to US$9,631. The lowest fare Altius scored on this window was US$3,761 for a 2026-09-01 departure, seen on 2026-07-03 — IMPRESSIVE at the time, 23.3% below the US$4,904 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.