Altius recorded 211 priced readings of nonstop business-class round trips from Frankfurt (FRA) to Boston (BOS) booked 30 days out, across 106 departure dates between 2026-06-21 and 2026-10-04. Observed fares ran from US$2,619 to US$12,751. The lowest fare Altius scored on this window was US$2,831 for a 2026-08-27 departure, seen on 2026-07-28 — DECENT at the time, 11.4% below the US$3,195 this route was typically running that day.
Altius recorded 210 priced readings of nonstop business-class round trips from Frankfurt (FRA) to Boston (BOS) booked 60 days out, across 106 departure dates between 2026-06-21 and 2026-10-04. Observed fares ran from US$2,960 to US$11,031. The lowest fare Altius scored on this window was US$3,654 for a 2026-11-18 departure, seen on 2026-09-19 — STRONG at the time, 15.8% below the US$4,340 this route was typically running that day.
Altius recorded 210 priced readings of nonstop business-class round trips from Frankfurt (FRA) to Boston (BOS) booked 90 days out, across 106 departure dates between 2026-06-21 and 2026-10-04. Observed fares ran from US$3,624 to US$9,252. The lowest fare Altius scored on this window was US$3,624 for a 2026-12-22 departure, seen on 2026-09-23 — RARE at the time, 33.8% below the US$5,474 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.