Altius recorded 266 priced readings of nonstop business-class round trips from Chicago (ORD) to ReykjavÃk (KEF) booked 30 days out, across 119 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$1,917 to US$13,229. The lowest fare Altius scored on this window was US$1,917 for a 2026-10-11 departure, seen on 2026-09-11 — RARE at the time, 31% below the US$2,778 this route was typically running that day.
Altius recorded 273 priced readings of nonstop business-class round trips from Chicago (ORD) to ReykjavÃk (KEF) booked 60 days out, across 126 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$1,498 to US$9,110. The lowest fare Altius scored on this window was US$1,498 for a 2026-11-18 departure, seen on 2026-09-19 — RARE at the time, 36% below the US$2,341 this route was typically running that day.
Altius recorded 291 priced readings of nonstop business-class round trips from Chicago (ORD) to ReykjavÃk (KEF) booked 90 days out, across 133 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$1,496 to US$10,211. The lowest fare Altius scored on this window was US$1,496 for a 2026-10-05 departure, seen on 2026-07-07 — RARE at the time, 38.9% below the US$2,448 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.