Altius recorded 231 priced readings of nonstop business-class round trips from London (LHR) to Portland (PDX) booked 30 days out, across 112 departure dates between 2026-06-06 and 2026-10-03. Observed fares ran from US$5,801 to US$19,028. The lowest fare Altius scored on this window was US$5,801 for a 2026-07-21 departure, seen on 2026-06-21 — STRONG at the time, 16.8% below the US$6,972 this route was typically running that day.
Altius recorded 205 priced readings of nonstop business-class round trips from London (LHR) to Portland (PDX) booked 60 days out, across 98 departure dates between 2026-06-06 and 2026-10-03. Observed fares ran from US$4,882 to US$12,837. The lowest fare Altius scored on this window was US$4,882 for a 2026-08-27 departure, seen on 2026-06-28 — STRONG at the time, 16% below the US$5,812 this route was typically running that day.
Altius recorded 183 priced readings of nonstop business-class round trips from London (LHR) to Portland (PDX) booked 90 days out, across 87 departure dates between 2026-06-06 and 2026-10-03. Observed fares ran from US$5,081 to US$14,979. The lowest fare Altius scored on this window was US$5,081 for a 2026-12-23 departure, seen on 2026-09-24 — IMPRESSIVE at the time, 23.1% below the US$6,607 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.