UA558 DenverDEN · 07:45 BostonBOS · 13:47
UA558 by United Airlines flies from Denver (DEN) to Boston (BOS) for the Thu, Sep 10 departure.
arrived at BOS · 19 min early
Where the minutes go
last 4 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at DEN and BOS 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 Denver to Boston flights today
same route · United AirlinesIf UA558 is cancelled, these are the other United Airlines nonstop flights from Denver to Boston on the same day, with scheduled departure times in DEN local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA558 actually runs
Pro Flight Search has tracked every published board update for UA558 across the DEN and BOS boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 3 completed legs so far: landed -9 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how UA558 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: N14576, N27258, N34562, N14509.
Board clocks recorded as DEN and BOS published them.
Planning around UA558? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA558 Denver to Boston on-time performance, measured from the DEN and BOS airport boards.
https://proflightsearch.com/flight/UA558
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