Altius recorded 312 priced readings of nonstop business-class round trips from Atlanta (ATL) to London (LHR) booked 90 days out, across 138 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$3,894 to US$7,275. The lowest fare Altius scored on this window was US$3,894 for a 2026-12-20 departure, seen on 2026-09-21 — IMPRESSIVE at the time, 22.8% below the US$5,044 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.