Altius recorded 301 priced readings of nonstop business-class round trips from New York (JFK) to Lisbon (LIS) booked 30 days out, across 135 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$3,526 to US$16,566. The lowest fare Altius scored on this window was US$3,526 for a 2026-07-31 departure, seen on 2026-07-01 — STRONG at the time, 20.4% below the US$4,430 this route was typically running that day.
Altius recorded 308 priced readings of nonstop business-class round trips from New York (JFK) to Lisbon (LIS) booked 60 days out, across 138 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$2,849 to US$14,476. The lowest fare Altius scored on this window was US$2,849 for a 2026-11-11 departure, seen on 2026-09-12 — RARE at the time, 39.1% below the US$4,678 this route was typically running that day.
Altius recorded 304 priced readings of nonstop business-class round trips from New York (JFK) to Lisbon (LIS) booked 90 days out, across 137 departure dates between 2026-05-20 and 2026-10-04. Observed fares ran from US$2,849 to US$13,590. The lowest fare Altius scored on this window was US$2,849 for a 2026-12-01 departure, seen on 2026-09-02 — RARE at the time, 35.3% below the US$4,403 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.