Altius recorded 298 priced readings of nonstop business-class round trips from San Francisco (SFO) to CancĂșn (CUN) booked 30 days out, across 133 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$1,157 to US$3,785. The lowest fare Altius scored on this window was US$1,195 for a 2026-09-30 departure, seen on 2026-08-31 â DECENT at the time, 14% below the US$1,390 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.