Altius recorded 307 priced readings of nonstop business-class round trips from Chicago (ORD) to Rome (FCO) booked 60 days out, across 139 departure dates between 2026-05-20 and 2026-10-05. Observed fares ran from US$3,361 to US$12,443. The lowest fare Altius scored on this window was US$3,361 for a 2026-08-11 departure, seen on 2026-06-12 — RARE at the time, 30.7% below the US$4,850 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.