Altius recorded 246 priced readings of nonstop business-class round trips from London (LHR) to Marseille (MRS) booked 90 days out, across 120 departure dates between 2026-06-06 and 2026-10-04. Observed fares ran from US$416 to US$1,439. The lowest fare Altius scored on this window was US$431 for a 2026-12-09 departure, seen on 2026-09-10 — STRONG at the time, 20.5% below the US$542 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.