Altius recorded 94 priced readings of nonstop business-class round trips from Paris (CDG) to Boston (BOS) booked 90 days out, across 47 departure dates between 2026-08-19 and 2026-10-04. Observed fares ran from US$3,317 to US$4,966. Every fare Altius recorded for trips booked 90 days out stayed close enough to what this route typically costs that none was flagged.