UA1521 Des MoinesDSM · 09:13 DenverDEN · 10:21
UA1521 by United Airlines flies from Des Moines (DSM) to Denver (DEN) for the Tue, Aug 18 departure.
estimated arrival at DEN · local time · ~63 min from now
position updated 4m ago · checking again in 90s
Live position · flown path, last 34 min
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 +18 min · 0 cancelled · 14 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at DSM 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 Des Moines to Denver flights today
same route · United AirlinesIf UA1521 is cancelled, these are the other United Airlines nonstop flights from Des Moines to Denver on the same day, with scheduled departure times in DSM local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA1521 actually runs
Pro Flight Search has tracked every published board update for UA1521 across the DSM and DEN boards: schedule changes, gate pushes and actual clocks. Usually lands ~20 min late. Based on 14 confirmed landings · 7/14 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how UA1521 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: N889UA, N829UA, N825UA, N73278.
Board clocks recorded as DSM and DEN published them.
Planning around UA1521? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA1521 Des Moines to Denver on-time performance, measured from the DSM and DEN airport boards.
https://proflightsearch.com/flight/UA1521
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