Altius recorded 305 priced readings of nonstop business-class round trips from San Francisco (SFO) to Tokyo (NRT) booked 30 days out, across 137 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$2,809 to US$9,485. The lowest fare Altius scored on this window was US$2,809 for a 2026-08-24 departure, seen on 2026-07-25 — LEGENDARY at the time, 45.3% below the US$5,135 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.