Altius recorded 209 priced readings of nonstop business-class round trips from Frankfurt (FRA) to Washington (IAD) booked 90 days out, across 106 departure dates between 2026-06-21 and 2026-10-04. Observed fares ran from US$3,812 to US$5,262. The lowest fare Altius scored on this window was US$3,812 for a 2026-12-22 departure, seen on 2026-09-23 — DECENT at the time, 14.2% below the US$4,443 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.