Flight profile · United Airlines
UA1023
Denver (DEN) to Chicago (ORD) · scheduled 3:20 PM – 6:55 PM
How UA1023 performs
369 operations, 2025-06-26 to 2026-06-30.
UA1023 arrived on time 59.8% of the time, against 74.4% for all DEN → ORD flights — this specific departure is 14.5 percentage points worse than the route as a whole. Against United Airlines’s own flights on this route it is 15.3 points worse.
Source: US DOT Bureau of Transportation Statistics · 369 operations between 2025-06-26 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1023 | 59.8% | 0.27% | 7 min | 11.2% | 369 |
| United Airlines on DEN → ORD | 75.1% | 0.84% | -3 min | 9.0% | 10,800 |
| All DEN → ORD flights | 74.4% | 0.95% | -3 min | 9.5% | 18,922 |
Source: FlyerIntel analysis of US DOT BTS data · 2025-06-26 to 2026-06-30
Other routes UA1023 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 |
|---|---|---|---|
| SMF→DEN Sacramento to Denver | 2026-05-21 – 2026-06-30 | 41 | — |
| ORD→CLE Chicago to Cleveland | 2026-06-01 – 2026-06-24 | 20 | — |
| ORD→CMH Chicago to Columbus | 2026-04-30 – 2026-05-20 | 15 | — |
| SFO→DEN San Francisco to Denver | 2026-03-05 – 2026-03-28 | 24 | — |
| ORD→IAD Chicago to Washington | 2025-10-26 – 2026-01-05 | 55 | — |
| LAX→DEN Los Angeles to Denver | 2025-12-18 – 2026-01-05 | 19 | — |
| AUS→DEN Austin to Denver | 2025-10-26 – 2025-12-01 | 31 | — |
| MCI→ORD Kansas City to Chicago | 2024-08-19 – 2025-06-25 | 103 | 86.3% |
| SFO→JAC San Francisco to Jackson | 2025-06-14 – 2025-06-21 | 2 | — |
| DFW→IAH Dallas–Fort Worth to Houston | 2025-05-24 – 2025-06-07 | 3 | — |
| OMA→ORD Omaha to Chicago | 2025-03-06 – 2025-05-21 | 38 | — |
| IAH→EWR Houston to Newark | 2025-03-30 – 2025-04-30 | 32 | — |
| ORD→DCA Chicago to Washington | 2024-10-27 – 2025-03-29 | 152 | 73.6% |
| SAN→ORD San Diego to Chicago | 2024-12-03 – 2025-03-05 | 37 | — |
| LGA→ORD New York to Chicago | 2024-12-19 – 2025-01-06 | 11 | — |
| ORD→DEN Chicago to Denver | 2025-01-06 – 2025-01-06 | 1 | — |
| IAD→DEN Washington to Denver | 2024-09-26 – 2024-10-26 | 31 | — |
| MSY→IAH New Orleans to Houston | 2024-09-01 – 2024-09-25 | 25 | — |
| DEN→MTJ Denver to Montrose | 2024-03-31 – 2024-08-18 | 141 | 67.6% |
| IAH→PSP Houston to Palm Springs | 2023-10-29 – 2024-03-30 | 154 | 83.1% |
| DEN→STL Denver to St. Louis | 2023-09-29 – 2023-10-28 | 30 | — |
| SLC→DEN Salt Lake City to Denver | 2023-10-01 – 2023-10-28 | 27 | — |
| MCI→IAH Kansas City to Houston | 2023-09-05 – 2023-09-28 | 24 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1023 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 369 records of UA1023 operating DEN → ORD, 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.