UA4591 HarrisburgMDT WashingtonIAD · 15:53
UA4591 by United Airlines flies from Harrisburg (MDT) to Washington (IAD).
scheduled from MDT
Where the minutes go
last 7 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operationmedian arrival −21 min · 0 cancelled · 10 operations tracked
The route today
live boardsTomorrow at IAD
ForecastFri 30 Oct, local date
- Chance a departure is cancelled
- 1.3%usually 2.0%
- Chance a departure leaves 60+ min late
- 7.3%usually 10%
Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · Based on about 360 departures a day. · 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.
How UA4591 actually runs
Pro Flight Search has tracked every published board update for UA4591 across the MDT and IAD boards: schedule changes, gate pushes and actual clocks. Usually lands ~12 min early. Based on 10 confirmed landings · 9/10 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how UA4591 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: N507GJ, N557GJ, N503GJ, N587GJ.
Board clocks recorded as MDT and IAD published them.
Planning around UA4591? 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: UA4591 Harrisburg to Washington on-time performance, measured from the MDT and IAD airport boards.
https://proflightsearch.com/flight/UA4591
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