Flight profile · United Airlines
UA1588
Denver (DEN) to Redmond (RDM) · scheduled 7:17 PM – 8:50 PM
How UA1588 performs
920 operations, 2023-07-02 to 2026-06-30.
UA1588 arrived on time 73.5% of the time, against 75.6% for all DEN → RDM flights — this specific departure is 2.1 percentage points worse than the route as a whole. Against United Airlines’s own flights on this route it is 2.0 points worse.
Source: US DOT Bureau of Transportation Statistics · 920 operations between 2023-07-02 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1588 | 73.5% | 1.30% | -4 min | 9.4% | 920 |
| United Airlines on DEN → RDM | 75.6% | 0.64% | -3 min | 6.8% | 2,183 |
| All DEN → RDM flights | 75.6% | 0.64% | -3 min | 6.8% | 2,188 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-02 to 2026-06-30
By day of week
Does UA1588 run worse on particular days?
Wednesday is historically the most reliable day and Thursday the least, a gap of 11.6 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-02 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes UA1588 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| TYS→DEN Knoxville/Maryville to Denver | 2026-04-30 – 2026-05-20 | 21 | — |
| PNS→DEN Pensacola to Denver | 2026-03-29 – 2026-04-29 | 32 | — |
| MSY→DEN New Orleans to Denver | 2025-10-26 – 2025-12-01 | 36 | — |
| ORD→DEN Chicago to Denver | 2023-08-01 – 2025-05-21 | 248 | 77.0% |
| RSW→ORD Fort Myers to Chicago | 2023-08-01 – 2025-03-05 | 56 | — |
| SJC→DEN San Jose to Denver | 2024-12-19 – 2025-01-05 | 15 | — |
| DTW→DEN Detroit to Denver | 2024-10-27 – 2024-12-02 | 36 | — |
| SDF→DEN Louisville to Denver | 2024-09-26 – 2024-10-26 | 31 | — |
| RDU→DEN Raleigh–Durham to Denver | 2024-01-01 – 2024-09-25 | 46 | — |
| ORF→ORD Norfolk to Chicago | 2024-07-01 – 2024-08-18 | 48 | — |
| OMA→ORD Omaha to Chicago | 2024-03-07 – 2024-06-26 | 67 | — |
| ORD→SAN Chicago to San Diego | 2024-05-24 – 2024-06-21 | 5 | — |
| RIC→DEN Richmond to Denver | 2023-09-05 – 2023-10-28 | 54 | — |
| LAS→DEN Las Vegas to Denver | 2023-07-01 – 2023-07-31 | 27 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1588 currently operates. Blending them would produce an average of two different flights.
Why UA1588 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding, fuelling — within the carrier’s control
weather severe enough to stop this flight specifically
airspace and airport capacity, including weather-driven flow control
Share of the delay minutes US DOT attributed to each cause for UA1588 on DEN → RDM. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Other departures on DEN → RDM
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| UA2082 | United Airlines | 74.8% | 1 min early | 786 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 920 records of UA1588 operating DEN → RDM, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.