Altius recorded 304 priced readings of nonstop business-class round trips from Washington (IAD) to CancĂșn (CUN) booked 90 days out, across 137 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$679 to US$2,313. The lowest fare Altius scored on this window was US$679 for a 2026-09-08 departure, seen on 2026-06-10 â STRONG at the time, 19.7% below the US$846 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.