Flight profile · United Airlines
UA2123
Kansas City (MCI) to Denver (DEN) · scheduled 5:15 PM – 6:09 PM
How UA2123 performs
752 operations, 2024-03-07 to 2026-06-30.
UA2123 arrived on time 65.8% of the time, against 78.2% for all MCI → DEN flights — this specific departure is 12.4 percentage points worse than the route as a whole. Against United Airlines’s own flights on this route it is 15.4 points worse.
Source: US DOT Bureau of Transportation Statistics · 752 operations between 2024-03-07 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA2123 | 65.8% | 1.06% | 5 min | 14.6% | 752 |
| United Airlines on MCI → DEN | 81.2% | 0.76% | -5 min | 6.0% | 4,199 |
| All MCI → DEN flights | 78.2% | 0.91% | -3 min | 7.2% | 12,773 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-03-07 to 2026-06-30
Other routes UA2123 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 |
|---|---|---|---|
| DEN→SFO Denver to San Francisco | 2025-10-26 – 2026-06-30 | 244 | 61.7% |
| SJC→DEN San Jose to Denver | 2026-02-12 – 2026-03-04 | 21 | — |
| MFR→SFO Medford to San Francisco | 2024-02-15 – 2024-03-06 | 21 | — |
| AUS→SFO Austin to San Francisco | 2023-07-01 – 2024-02-14 | 229 | 90.8% |
| SFO→JAC San Francisco to Jackson | 2024-01-09 – 2024-02-13 | 34 | — |
| SFO→LAX San Francisco to Los Angeles | 2023-09-05 – 2023-09-28 | 24 | — |
| SFO→SAN San Francisco to San Diego | 2023-07-01 – 2023-09-04 | 66 | — |
Because the same number has served different journeys, the statistics above describe only the route UA2123 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 752 records of UA2123 operating MCI → DEN, 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.