Altius recorded 91 priced readings of nonstop business-class round trips from Paris (CDG) to Philadelphia (PHL) booked 90 days out, across 46 departure dates between 2026-08-19 and 2026-10-05. Observed fares ran from US$3,646 to US$16,970. The lowest fare Altius scored on this window was US$3,646 for a 2026-12-26 departure, seen on 2026-09-27 — LEGENDARY at the time, 50.1% below the US$7,307 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.