UA4004 WashingtonIAD · 12:40 New YorkLGA · 14:09
UA4004 by United Airlines flies from Washington (IAD) to New York (LGA).
scheduled from IAD
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 +2 min · 1 cancelled · 12 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at IAD and LGA are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, under conditions like today's, over the last 90 days.
Under low visibility at LGA, United Airlines has historically cancelled ~17% of flights, vs 4.3% in clear conditions, over the trailing 90 days.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Washington to New York flights today
same route · United AirlinesIf UA4004 is cancelled, these are the other United Airlines nonstop flights from Washington to New York on the same day, with scheduled departure times in IAD local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA4004 actually runs
Pro Flight Search has tracked every published board update for UA4004 across the IAD and LGA boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 11 confirmed landings · 7/11 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how UA4004 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 IAD and LGA published them.
Planning around UA4004? 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 — UA4004 Washington to New York on-time performance, measured from the IAD and LGA airport boards.
https://proflightsearch.com/flight/UA4004
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