Altius recorded 294 priced readings of nonstop business-class round trips from Boston (BOS) to Rome (FCO) booked 30 days out, across 131 departure dates between 2026-05-20 and 2026-10-05. Observed fares ran from US$3,454 to US$17,017. The lowest fare Altius scored on this window was US$3,454 for a 2026-07-14 departure, seen on 2026-06-14 — DECENT at the time, 11% below the US$3,881 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.