Flight profile · United Airlines
UA1666
Cincinnati / Covington (CVG) to Denver (DEN) · scheduled 8:00 AM – 10:12 AM
How UA1666 performs
425 operations, 2025-05-01 to 2026-06-30.
UA1666 arrived on time 87.9% of the time, against 81.5% for all CVG → DEN flights — this specific departure is 6.4 percentage points better than the route as a whole. Against United Airlines’s own flights on this route it is 1.6 points better.
Source: US DOT Bureau of Transportation Statistics · 425 operations between 2025-05-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1666 | 87.9% | 0.71% | -9 min | 4.3% | 425 |
| United Airlines on CVG → DEN | 86.3% | 0.69% | -9 min | 5.3% | 2,188 |
| All CVG → DEN flights | 81.5% | 0.72% | -7 min | 6.4% | 5,109 |
Source: FlyerIntel analysis of US DOT BTS data · 2025-05-01 to 2026-06-30
Other routes UA1666 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→CLT Denver to Charlotte | 2025-10-26 – 2025-12-01 | 33 | — |
| XNA→DEN Fayetteville/Springdale/Rogers to Denver | 2025-11-28 – 2025-11-28 | 1 | — |
| ORD→LGA Chicago to New York | 2025-03-30 – 2025-04-30 | 28 | — |
| JAX→EWR Jacksonville to Newark | 2024-10-27 – 2025-03-29 | 133 | 87.1% |
| IAD→SFO Washington to San Francisco | 2025-02-13 – 2025-03-05 | 21 | — |
| ORD→SLC Chicago to Salt Lake City | 2024-08-19 – 2024-10-26 | 69 | — |
| RDU→ORD Raleigh–Durham to Chicago | 2024-08-19 – 2024-09-25 | 38 | — |
| ORD→AUS Chicago to Austin | 2024-08-18 – 2024-08-18 | 1 | — |
| DEN→COS Denver to Colorado Springs | 2024-06-27 – 2024-08-14 | 47 | — |
| RAP→DEN Rapid City to Denver | 2024-08-01 – 2024-08-02 | 2 | — |
| RDU→DEN Raleigh–Durham to Denver | 2024-06-27 – 2024-06-30 | 4 | — |
| EWR→CLE Newark to Cleveland | 2023-09-05 – 2024-06-26 | 159 | 92.3% |
| MIA→IAD Miami to Washington | 2024-03-31 – 2024-05-22 | 53 | — |
| ORD→SAN Chicago to San Diego | 2023-11-28 – 2023-12-20 | 23 | — |
| STL→ORD St. Louis to Chicago | 2023-11-28 – 2023-11-30 | 3 | — |
| MSN→ORD Madison to Chicago | 2023-11-27 – 2023-11-27 | 1 | — |
| SLC→EWR Salt Lake City to Newark | 2023-10-29 – 2023-11-26 | 23 | — |
| RDU→EWR Raleigh–Durham to Newark | 2023-07-01 – 2023-09-04 | 65 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1666 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 425 records of UA1666 operating CVG → 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.