G4581 BostonBOS · 10:39 Grand RapidsGRR · 13:37
G4581 by Allegiant Air flies from Boston (BOS) to Grand Rapids (GRR) for the Sun, Nov 8 departure.
departs BOS · on schedule
board checked 31m ago · checking again in 45s
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at BOS and GRR are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records under conditions like today's, over the last 90 days.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
Tomorrow 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.
Tomorrow at Grand Rapids
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.
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Boston to Grand Rapids flights today
same route · Allegiant AirIf G4581 is cancelled, this is the other Allegiant Air nonstop flight from Boston to Grand Rapids on the same day, with scheduled departure times in BOS local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →
How G4581 actually runs
Pro Flight Search has tracked every published board update for G4581 across the BOS and GRR boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 2 completed legs so far: left noticeably late (~36 min) but landed a little late (~13 min). Not enough to call it.
The verdict above is that record speaking, so it reflects how G4581 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: N230NV, N196NV.
Board clocks recorded as BOS and GRR published them.
Planning around G4581? 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: G4581 Boston to Grand Rapids on-time performance, measured from the BOS and GRR airport boards.
https://proflightsearch.com/flight/G4581
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