Altius recorded 95 priced readings of nonstop business-class round trips from Paris (CDG) to Washington (IAD) booked 90 days out, across 48 departure dates between 2026-08-19 and 2026-10-05. Observed fares ran from US$3,828 to US$5,493. The lowest fare Altius scored on this window was US$3,828 for a 2026-12-22 departure, seen on 2026-09-23 — DECENT at the time, 12.3% below the US$4,365 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.