Altius recorded 308 priced readings of nonstop business-class round trips from San Francisco (SFO) to Frankfurt (FRA) booked 30 days out, across 138 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$3,240 to US$11,234. The lowest fare Altius scored on this window was US$3,240 for a 2026-08-13 departure, seen on 2026-07-14 — RARE at the time, 30.1% below the US$4,635 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.