UA4070 WashingtonIAD · 12:50 Knoxville/MaryvilleTYS
UA4070 by United Airlines flies from Washington (IAD) to Knoxville/Maryville (TYS) for the Tue, Aug 18 departure.
departs IAD · on schedule
board checked 140m ago · checking again in 45s
The route today
live boardsWhen it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Washington to Knoxville/Maryville flights today
same route · United AirlinesIf UA4070 is cancelled, these are the other United Airlines nonstop flights from Washington to Knoxville/Maryville 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 UA4070 actually runs
Pro Flight Search has tracked every published board update for UA4070 across the IAD and TYS boards: schedule changes, gate pushes and actual clocks. Combined risk score: 38.0/100. Based on airport operations, weather, and cached board history at IAD and TYS.
The verdict above is that record speaking, so it reflects how UA4070 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 TYS published them.
Planning around UA4070? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA4070 Washington to Knoxville/Maryville on-time performance, measured from the IAD and TYS airport boards.
https://proflightsearch.com/flight/UA4070
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