Altius recorded 270 priced readings of nonstop business-class round trips from Boston (BOS) to ReykjavÃk (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.
Altius recorded 282 priced readings of nonstop business-class round trips from Boston (BOS) to ReykjavÃk (KEF) booked 60 days out, across 134 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$1,198 to US$4,503. The lowest fare Altius scored on this window was US$1,198 for a 2026-11-18 departure, seen on 2026-09-19 — LEGENDARY at the time, 45.8% below the US$2,210 this route was typically running that day.
Altius recorded 304 priced readings of nonstop business-class round trips from Boston (BOS) to ReykjavÃk (KEF) booked 90 days out, across 138 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$1,196 to US$3,018. The lowest fare Altius scored on this window was US$1,196 for a 2026-10-11 departure, seen on 2026-07-13 — LEGENDARY at the time, 49.1% below the US$2,350 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.