Business class to Portugal was cheapest at 90 days out in November 2026, with 3 of 8 reaching LEGENDARY. Altius monitored 8 nonstop routes from 6 gateways, and the deepest fare was $4,135 to Lisbon departing 2026-11-15. Coverage is partial: 18 of 30 departure dates observed.

Business class to Portugal was cheapest at 90 days out in October 2026, with 3 of 9 reaching LEGENDARY. Altius monitored 9 nonstop routes from 6 gateways, and the deepest fare was $4,134 to Lisbon departing 2026-10-11.

Business class to Portugal was cheapest at 60 days out in September 2026, with 3 of 9 reaching LEGENDARY. Altius monitored 9 nonstop routes from 6 gateways, and the deepest fare was $4,533 to Lisbon departing 2026-09-29.

Business class to Portugal was cheapest at 60 days out in August 2026, with 3 of 9 reaching LEGENDARY. Altius monitored 9 nonstop routes from 6 gateways, and the deepest fare was $4,433 to Lisbon departing 2026-08-24.

Business class to Portugal was cheapest at 30 days out in July 2026, with 1 of 9 reaching RARE. Altius monitored 9 nonstop routes from 6 gateways, and the deepest fare was $4,101 to Lisbon departing 2026-07-21.

Altius monitored 6 nonstop routes from 5 gateways to Portugal for June 2026 departures and recorded no fare below those routes' typical fares. Coverage is partial: 12 of 30 departure dates observed.