Altius recorded 51 priced readings of nonstop business-class round trips from Rome (FCO) to Boston (BOS) booked 90 days out, across 26 departure dates between 2026-08-20 and 2026-10-05. Observed fares ran from US$3,716 to US$8,147. The lowest fare Altius scored on this window was US$3,716 for a 2026-12-16 departure, seen on 2026-09-17 — STRONG at the time, 15.7% below the US$4,408 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.