Altius recorded 303 priced readings of nonstop business-class round trips from San Francisco (SFO) to Frankfurt (FRA) booked 90 days out, across 137 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$3,350 to US$10,196. The lowest fare Altius scored on this window was US$3,350 for a 2026-10-09 departure, seen on 2026-07-11 — RARE at the time, 38% below the US$5,403 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.