Altius recorded 301 priced readings of nonstop business-class round trips from San Francisco (SFO) to Amsterdam (AMS) booked 30 days out, across 137 departure dates between 2026-05-20 and 2026-10-05. Observed fares ran from US$3,655 to US$12,501. The lowest fare Altius scored on this window was US$3,655 for a 2026-08-12 departure, seen on 2026-07-13 — STRONG at the time, 18.4% below the US$4,479 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.