Altius recorded 308 priced readings of nonstop business-class round trips from Newark (EWR) to Porto (OPO) booked 60 days out, across 138 departure dates between 2026-05-20 and 2026-10-05. Observed fares ran from US$2,849 to US$11,738. The lowest fare Altius scored on this window was US$2,849 for a 2026-11-01 departure, seen on 2026-09-02 — IMPRESSIVE at the time, 29.1% below the US$4,018 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.