4B865 MassenaMSS BostonBOS · 17:50
4B865 by Boutique Air flies from Massena (MSS) to Boston (BOS).
tracked route MSS → BOS
Where the minutes go
last 3 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The route today
live boardsTomorrow at Boston
ForecastMon 9 Nov, local date
Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
How 4B865 actually runs
Pro Flight Search has tracked every published board update for 4B865 across the MSS and BOS boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 3 completed legs so far: landed +85 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how 4B865 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as MSS and BOS published them.
Planning around 4B865? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search: 4B865 Massena to Boston on-time performance, measured from the MSS and BOS airport boards.
https://proflightsearch.com/flight/4B865
.