UA1256 Knoxville/MaryvilleTYS DenverDEN · 10:20
UA1256 by United Airlines flies from Knoxville/Maryville (TYS) to Denver (DEN) for the Sat, Sep 5 departure.
arrived at DEN · 20 min early
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 −23 min · 0 cancelled · 8 operations tracked
The route today
live boardsWhen it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
How UA1256 actually runs
Pro Flight Search has tracked every published board update for UA1256 across the TYS and DEN boards: schedule changes, gate pushes and actual clocks. Usually lands ~23 min early. Based on 8 confirmed landings · 7/8 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how UA1256 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: N73276, N491UA, N476UA, N438UA.
Board clocks recorded as TYS and DEN published them.
Planning around UA1256? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA1256 Knoxville/Maryville to Denver on-time performance, measured from the TYS and DEN airport boards.
https://proflightsearch.com/flight/UA1256
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