Altius recorded 249 priced readings of nonstop business-class round trips from London (LHR) to Houston (IAH) booked 90 days out, across 120 departure dates between 2026-06-06 and 2026-10-04. Observed fares ran from US$4,133 to US$6,330. The lowest fare Altius scored on this window was US$4,386 for a 2026-12-13 departure, seen on 2026-09-14 — STRONG at the time, 18.4% below the US$5,375 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.