Altius recorded 306 priced readings of nonstop business-class round trips from Chicago (ORD) to Paris (CDG) booked 60 days out, across 137 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$3,272 to US$9,517. The lowest fare Altius scored on this window was US$3,272 for a 2026-11-17 departure, seen on 2026-09-18 — RARE at the time, 39% below the US$5,364 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.