About 1 in 7 UA 4721 flights from Pasco arrived 15+ minutes late, diverted or cancelled over the past year (14%); 0.3% were cancelled. The typical flight landed 16 minutes early.
UA 4721: PSC → DEN
Scheduled to leave Pasco at 12:45 p.m. local time, operated by SkyWest as OO 4721. Over the past year it arrived on time 86% of the time (363 flights), in line with other UA flights on the route at that hour (87%). Last seen in the data Aug 31, 2026.
Usually United Airlines's last flight of the day from Pasco to Denver (100% of days). United Airlines's last PSC–DEN flight was cancelled 0.3% of the time, against 0.8% for its earlier ones. If it's cancelled, the next United Airlines flight is usually around 5:14 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 91% |
| Tuesday | 52 | 87% |
| Wednesday | 52 | 87% |
| Thursday | 51 | 76% |
| Friday | 52 | 81% |
| Saturday | 51 | 90% |
| Sunday | 52 | 88% |
Why it was late
All flights PSC → DEN · Connecting off UA 4721? Check the risk
Questions
How often is UA 4721 from PSC to DEN late?
United Airlines 4721 from Pasco/Kennewick/Richland, WA to Denver, CO arrived 15 or more minutes late, was diverted or was cancelled on 14% of 363 scheduled flights between September 2025 and August 2026. 0.3% 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.