About 1 in 4 UA 4799 flights from Denver arrived 15+ minutes late, diverted or cancelled over the past year (25%); 0.9% were cancelled. The typical flight landed 6 minutes early.
UA 4799: DEN → BIS
Scheduled to leave Denver at 8:55 p.m. local time, operated by SkyWest as OO 4799. Over the past year it arrived on time 75% of the time (321 flights), in line with other UA flights on the route at that hour (75%). Last seen in the data Aug 31, 2026.
Usually United Airlines's last flight of the day from Denver to Bismarck (99% of days). United Airlines's last DEN–BIS flight was cancelled 0.8% of the time, against 0.7% for its earlier ones. If it's cancelled, the next United Airlines flight is usually around 10:05 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 68% |
| Tuesday | 51 | 84% |
| Wednesday | 52 | 73% |
| Thursday | 51 | 84% |
| Friday | 52 | 69% |
| Saturday | 12 | — |
| Sunday | 50 | 70% |
Why it was late
All flights DEN → BIS · Connecting off UA 4799? Check the risk
Questions
How often is UA 4799 from DEN to BIS late?
United Airlines 4799 from Denver, CO to Bismarck/Mandan, ND arrived 15 or more minutes late, was diverted or was cancelled on 25% of 321 scheduled flights between September 2025 and August 2026. 0.9% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check United Airlines for today's flight. Method.