Altius recorded 304 priced readings of nonstop business-class round trips from Atlanta (ATL) to Madrid (MAD) booked 30 days out, across 135 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$3,910 to US$20,335. The lowest fare Altius scored on this window was US$3,910 for a 2026-07-22 departure, seen on 2026-06-22 — RARE at the time, 33% below the US$5,836 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.