Altius recorded 268 priced readings of nonstop business-class round trips from Boston (BOS) to Rome (FCO) booked 60 days out, across 118 departure dates between 2026-05-20 and 2026-10-03. Observed fares ran from US$3,454 to US$14,826. The lowest fare Altius scored on this window was US$3,454 for a 2026-08-12 departure, seen on 2026-06-13 — STRONG at the time, 17.8% below the US$4,202 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.