UA5866 DenverDEN · 12:34 BillingsBIL · 15:24
UA5866 by United Airlines flies from Denver (DEN) to Billings (BIL) for the Thu, Aug 20 departure.
departs DEN · on schedule
board checked 268m ago · checking again in 45s
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 +8 min · 0 cancelled · 7 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at DEN and BIL 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 Billings flights today
same route · United AirlinesIf UA5866 is cancelled, these are the other United Airlines nonstop flights from Denver to Billings 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 UA5866 actually runs
Pro Flight Search has tracked every published board update for UA5866 across the DEN and BIL boards: schedule changes, gate pushes and actual clocks. Usually lands ~28 min late. Based on 6 confirmed landings · 3/6 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 UA5866 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: N532GJ, N531GJ, N797SK, N788SK.
Board clocks recorded as DEN and BIL published them.
Planning around UA5866? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA5866 Denver to Billings on-time performance, measured from the DEN and BIL airport boards.
https://proflightsearch.com/flight/UA5866
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