Altius recorded 209 priced readings of nonstop business-class round trips from Frankfurt (FRA) to San Francisco (SFO) booked 30 days out, across 106 departure dates between 2026-06-21 and 2026-10-04. Observed fares ran from US$3,328 to US$10,103. The lowest fare Altius scored on this window was US$3,328 for a 2026-08-04 departure, seen on 2026-07-05 — RARE at the time, 33% below the US$4,967 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.