Altius recorded 95 priced readings of nonstop business-class round trips from Paris (CDG) to Chicago (ORD) booked 30 days out, across 48 departure dates between 2026-08-19 and 2026-10-05. Observed fares ran from US$4,228 to US$9,618. The lowest fare Altius scored on this window was US$4,228 for a 2026-11-01 departure, seen on 2026-10-02 — IMPRESSIVE at the time, 24.7% below the US$5,615 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.