About 1 in 4 UA 478 flights from Billings arrived 15+ minutes late, diverted or cancelled over the past year (24%); 0.0% were cancelled. The typical flight landed 10 minutes early.
UA 478: BIL → DEN
Scheduled to leave Billings at 2:35 p.m. local time. Over the past year it arrived on time 76% of the time (359 flights), in line with other UA flights on the route at that hour (76%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 72% |
| Tuesday | 52 | 77% |
| Wednesday | 52 | 75% |
| Thursday | 50 | 78% |
| Friday | 51 | 75% |
| Saturday | 50 | 68% |
| Sunday | 51 | 86% |
Why it was late
All flights BIL → DEN · Connecting off UA 478? Check the risk
Questions
How often is UA 478 from BIL to DEN late?
United Airlines 478 from Billings, MT to Denver, CO arrived 15 or more minutes late, was diverted or was cancelled on 24% of 359 scheduled flights between September 2025 and August 2026. 0.0% 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.