Altius recorded 308 priced readings of nonstop business-class round trips from Dallas (DFW) to London (LHR) booked 30 days out, across 137 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$4,251 to US$11,559. The lowest fare Altius scored on this window was US$4,251 for a 2026-08-15 departure, seen on 2026-07-16 — RARE at the time, 35.9% below the US$6,632 this route was typically running that day.
Altius recorded 307 priced readings of nonstop business-class round trips from Dallas (DFW) to London (LHR) booked 60 days out, across 137 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$4,692 to US$7,710. The lowest fare Altius scored on this window was US$4,692 for a 2026-11-21 departure, seen on 2026-09-22 — RARE at the time, 33.7% below the US$7,077 this route was typically running that day.
Altius recorded 306 priced readings of nonstop business-class round trips from Dallas (DFW) to London (LHR) booked 90 days out, across 137 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$4,340 to US$7,805. The lowest fare Altius scored on this window was US$4,340 for a 2026-12-23 departure, seen on 2026-09-24 — IMPRESSIVE at the time, 29.5% below the US$6,156 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.