Boston to Reykjavík — what Altius has recorded

Altius recorded 270 priced readings of nonstop business-class round trips from Boston (BOS) to Reykjavík (KEF) booked 30 days out, across 128 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$1,198 to US$5,090. The lowest fare Altius scored on this window was US$1,198 for a 2026-10-20 departure, seen on 2026-09-20 — LEGENDARY at the time, 51.9% below the US$2,491 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.