Altius recorded 310 priced readings of nonstop business-class round trips from Miami (MIA) to Buenos Aires (EZE) booked 90 days out, across 137 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$2,799 to US$4,461. The lowest fare Altius scored on this window was US$2,799 for a 2026-09-02 departure, seen on 2026-06-04 — STRONG at the time, 18.3% below the US$3,426 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.