Altius recorded 145 priced readings of nonstop business-class round trips from San Francisco (SFO) to Chicago (ORD) booked 30 days out, across 73 departure dates between 2026-07-25 and 2026-10-05. Observed fares ran from US$999 to US$1,215. Every fare Altius recorded for trips booked 30 days out stayed close enough to what this route typically costs that none was flagged.
Altius recorded 145 priced readings of nonstop business-class round trips from San Francisco (SFO) to Chicago (ORD) booked 60 days out, across 73 departure dates between 2026-07-25 and 2026-10-05. Observed fares ran from US$1,017 to US$1,828. The lowest fare Altius scored on this window was US$1,017 for a 2026-10-17 departure, seen on 2026-08-18 — STRONG at the time, 20.5% below the US$1,279 this route was typically running that day.
Altius recorded 145 priced readings of nonstop business-class round trips from San Francisco (SFO) to Chicago (ORD) booked 90 days out, across 73 departure dates between 2026-07-25 and 2026-10-05. Observed fares ran from US$999 to US$2,918. The lowest fare Altius scored on this window was US$999 for a 2026-11-09 departure, seen on 2026-08-11 — STRONG at the time, 16.5% below the US$1,196 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.