Altius recorded 313 priced readings of nonstop business-class round trips from Boston (BOS) to Dublin (DUB) booked 30 days out, across 139 departure dates between 2026-05-20 and 2026-10-05. Observed fares ran from US$2,997 to US$11,430. The lowest fare Altius scored on this window was US$3,098 for a 2026-10-11 departure, seen on 2026-09-11 — STRONG at the time, 20.4% below the US$3,892 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.