Flight profile · United Airlines
UA1233
Denver (DEN) to Newark (EWR) · scheduled 11:35 AM – 5:30 PM
How UA1233 performs
676 operations, 2024-05-23 to 2026-06-30.
UA1233 arrived on time 70.6% of the time, against 75.4% for all DEN → EWR flights — this specific departure is 4.8 percentage points worse than the route as a whole. Against United Airlines’s own flights on this route it is 4.8 points worse.
Source: US DOT Bureau of Transportation Statistics · 676 operations between 2024-05-23 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1233 | 70.6% | 1.18% | -4 min | 11.0% | 676 |
| United Airlines on DEN → EWR | 75.4% | 2.11% | -6 min | 10.7% | 9,570 |
| All DEN → EWR flights | 75.4% | 2.11% | -6 min | 10.7% | 9,570 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-05-23 to 2026-06-30
Other routes UA1233 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 |
|---|---|---|---|
| EWR→RDU Newark to Raleigh–Durham | 2026-06-25 – 2026-06-30 | 5 | — |
| SFO→DEN San Francisco to Denver | 2026-01-06 – 2026-06-24 | 71 | — |
| EWR→FLL Newark to Fort Lauderdale | 2026-03-05 – 2026-04-29 | 56 | — |
| SAN→DEN San Diego to Denver | 2026-02-12 – 2026-03-04 | 21 | — |
| EWR→PBI Newark to West Palm Beach | 2026-01-08 – 2026-03-01 | 29 | — |
| ORF→DEN Norfolk to Denver | 2025-12-18 – 2026-01-05 | 19 | — |
| TUL→DEN Tulsa to Denver | 2025-12-02 – 2025-12-17 | 16 | — |
| EWR→IAH Newark to Houston | 2025-10-26 – 2025-12-01 | 36 | — |
| XNA→DEN Fayetteville/Springdale/Rogers to Denver | 2025-08-19 – 2025-09-01 | 14 | — |
| SJC→DEN San Jose to Denver | 2025-06-26 – 2025-08-18 | 54 | — |
| EWR→RSW Newark to Fort Myers | 2025-05-22 – 2025-06-25 | 35 | — |
| EWR→SFO Newark to San Francisco | 2025-02-13 – 2025-03-05 | 21 | — |
| FSD→DEN Sioux Falls to Denver | 2025-01-08 – 2025-02-12 | 36 | — |
| LAS→ORD Las Vegas to Chicago | 2025-01-07 – 2025-01-07 | 1 | — |
| EWR→CLT Newark to Charlotte | 2023-09-05 – 2024-05-22 | 137 | 78.9% |
| BWI→IAH Baltimore to Houston | 2024-03-31 – 2024-05-01 | 28 | — |
| MIA→EWR Miami to Newark | 2024-04-06 – 2024-04-27 | 4 | — |
| SAT→EWR San Antonio to Newark | 2024-03-07 – 2024-03-28 | 10 | — |
| LAX→IAH Los Angeles to Houston | 2024-03-10 – 2024-03-24 | 3 | — |
| SFO→EWR San Francisco to Newark | 2024-02-15 – 2024-03-06 | 21 | — |
| MSP→EWR Minneapolis to Newark | 2023-12-21 – 2024-01-08 | 19 | — |
| ORD→SEA Chicago to Seattle | 2023-10-29 – 2023-11-27 | 30 | — |
| MKE→IAH Milwaukee to Houston | 2023-10-01 – 2023-10-28 | 28 | — |
| DEN→IAH Denver to Houston | 2023-09-23 – 2023-09-23 | 1 | — |
| ORD→BUF Chicago to Buffalo | 2023-09-08 – 2023-09-22 | 3 | — |
| EWR→BTV Newark to Burlington | 2023-08-01 – 2023-09-04 | 32 | — |
| IAH→EWR Houston to Newark | 2023-07-01 – 2023-07-31 | 31 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1233 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 676 records of UA1233 operating DEN → EWR, 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.