Altius recorded 145 priced readings of nonstop business-class round trips from Chicago (ORD) to San Francisco (SFO) booked 60 days out, across 73 departure dates between 2026-07-25 and 2026-10-05. Observed fares ran from US$999 to US$1,865. The lowest fare Altius scored on this window was US$999 for a 2026-10-10 departure, seen on 2026-08-11 — STRONG at the time, 18.6% below the US$1,227 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.