Altius recorded 306 priced readings of nonstop business-class round trips from San Francisco (SFO) to Toronto (YYZ) booked 90 days out, across 137 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$1,073 to US$3,124. The lowest fare Altius scored on this window was US$1,073 for a 2026-09-12 departure, seen on 2026-06-14 — IMPRESSIVE at the time, 26.3% below the US$1,456 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.