Altius recorded 95 priced readings of nonstop business-class round trips from Paris (CDG) to Detroit (DTW) booked 60 days out, across 48 departure dates between 2026-08-19 and 2026-10-05. Observed fares ran from US$5,636 to US$9,778. The lowest fare Altius scored on this window was US$5,636 for a 2026-11-03 departure, seen on 2026-09-04 — STRONG at the time, 17.7% below the US$6,848 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.