UA599 WashingtonIAD · 17:26 DenverDEN · 19:33
UA599 by United Airlines flies from Washington (IAD) to Denver (DEN) for the Sun, Sep 6 departure.
arrived at DEN · 3 min late
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 +3 min · 0 cancelled · 7 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at IAD and DEN 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 Denver flights today
same route · United AirlinesIf UA599 is cancelled, these are the other United Airlines nonstop flights from Washington to Denver 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 UA599 actually runs
Pro Flight Search has tracked every published board update for UA599 across the IAD and DEN boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 7 confirmed landings · 5/7 within 15 min of schedule. Pushes back late but makes up time in the air.
The verdict above is that record speaking, so it reflects how UA599 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: N14507, N14576, N37525, N29978.
Board clocks recorded as IAD and DEN published them.
Planning around UA599? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA599 Washington to Denver on-time performance, measured from the IAD and DEN airport boards.
https://proflightsearch.com/flight/UA599
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