Altius recorded 89 priced readings of nonstop business-class round trips from Paris (CDG) to Seattle (SEA) booked 90 days out, across 45 departure dates between 2026-08-19 and 2026-10-05. Observed fares ran from US$5,209 to US$12,382. The lowest fare Altius scored on this window was US$5,209 for a 2026-12-01 departure, seen on 2026-09-02 — RARE at the time, 32.1% below the US$7,672 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.