Altius recorded 218 priced readings of nonstop business-class round trips from Boston (BOS) to Barcelona (BCN) booked 60 days out, across 91 departure dates between 2026-05-20 and 2026-08-18. Observed fares ran from US$2,733 to US$7,432. The lowest fare Altius scored on this window was US$2,733 for a 2026-08-22 departure, seen on 2026-06-23 — IMPRESSIVE at the time, 29.1% below the US$3,855 this route was typically running that day. Altius has not seen a nonstop business-class round trip on this route since 2026-08-18. The record above is what was observed while fares were being returned. Routes drop out of schedules and come back, so it is worth checking again.
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.