Altius recorded 303 priced readings of nonstop business-class round trips from Washington (IAD) to Tokyo (HND) booked 30 days out, across 138 departure dates between 2026-05-20 and 2026-10-05. Observed fares ran from US$6,652 to US$15,117. The lowest fare Altius scored on this window was US$7,664 for a 2026-08-23 departure, seen on 2026-07-24 — IMPRESSIVE at the time, 27.4% below the US$10,556 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.