UA4066 WashingtonIAD · 17:40 Raleigh/DurhamRDU · 18:59
UA4066 by United Airlines flies from Washington (IAD) to Raleigh/Durham (RDU) for the Mon, Sep 14 departure.
departs IAD · on schedule
board checked 300m ago · checking again in 45s
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at IAD and RDU 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.
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 Raleigh/Durham flights today
same route · United AirlinesIf UA4066 is cancelled, these are the other United Airlines nonstop flights from Washington to Raleigh/Durham 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 UA4066 actually runs
Pro Flight Search has tracked every published board update for UA4066 across the IAD and RDU boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 1 completed leg so far: landed -117 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how UA4066 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: N17403.
Board clocks recorded as IAD and RDU published them.
Planning around UA4066? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA4066 Washington to Raleigh/Durham on-time performance, measured from the IAD and RDU airport boards.
https://proflightsearch.com/flight/UA4066
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