Flight profile · United Airlines
UA1236
Denver (DEN) to Phoenix (PHX) · scheduled 9:05 PM – 9:59 PM
How UA1236 performs
463 operations, 2024-08-19 to 2026-06-29.
UA1236 arrived on time 69.8% of the time, against 76.1% for all DEN → PHX flights — this specific departure is 6.3 percentage points worse than the route as a whole. Against United Airlines’s own flights on this route it is 11.1 points worse.
Source: US DOT Bureau of Transportation Statistics · 463 operations between 2024-08-19 to 2026-06-29
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1236 | 69.8% | 0.65% | -4 min | 13.3% | 463 |
| United Airlines on DEN → PHX | 80.9% | 0.67% | -7 min | 6.8% | 7,008 |
| All DEN → PHX flights | 76.1% | 0.89% | -4 min | 7.7% | 27,686 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-08-19 to 2026-06-29
Other routes UA1236 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 |
|---|---|---|---|
| SRQ→ORD Sarasota/Bradenton to Chicago | 2026-04-30 – 2026-05-20 | 21 | — |
| STL→DEN St. Louis to Denver | 2026-02-12 – 2026-04-29 | 46 | — |
| PSP→DEN Palm Springs to Denver | 2026-04-13 – 2026-04-27 | 3 | — |
| DEN→SNA Denver to Santa Ana | 2026-03-10 – 2026-03-24 | 3 | — |
| SNA→DEN Santa Ana to Denver | 2026-01-06 – 2026-02-11 | 37 | — |
| LGA→DEN New York to Denver | 2025-12-18 – 2026-01-05 | 17 | — |
| ORD→LGA Chicago to New York | 2025-12-18 – 2026-01-05 | 8 | — |
| SFO→DFW San Francisco to Dallas–Fort Worth | 2025-12-31 – 2025-12-31 | 1 | — |
| ORD→MSP Chicago to Minneapolis | 2025-12-24 – 2025-12-24 | 1 | — |
| SLC→DEN Salt Lake City to Denver | 2025-06-26 – 2025-12-17 | 54 | — |
| PHX→DEN Phoenix to Denver | 2025-11-02 – 2025-12-01 | 29 | — |
| DEN→XNA Denver to Fayetteville/Springdale/Rogers | 2025-11-29 – 2025-11-30 | 2 | — |
| MSY→DEN New Orleans to Denver | 2025-09-25 – 2025-10-24 | 22 | — |
| PHL→DEN Philadelphia to Denver | 2025-06-01 – 2025-06-25 | 25 | — |
| IAD→DEN Washington to Denver | 2025-03-30 – 2025-05-31 | 42 | — |
| IAH→IAD Houston to Washington | 2025-05-22 – 2025-05-31 | 10 | — |
| ORD→SAT Chicago to San Antonio | 2024-12-03 – 2024-12-18 | 16 | — |
| PBI→ORD West Palm Beach to Chicago | 2024-12-03 – 2024-12-18 | 16 | — |
| PHX→ORD Phoenix to Chicago | 2024-08-19 – 2024-12-01 | 6 | — |
| SFO→DEN San Francisco to Denver | 2024-08-19 – 2024-08-19 | 1 | — |
| EWR→PHX Newark to Phoenix | 2023-07-01 – 2024-08-18 | 339 | 91.9% |
| EWR→SMF Newark to Sacramento | 2024-05-02 – 2024-05-22 | 21 | — |
| IAH→ORD Houston to Chicago | 2024-04-01 – 2024-05-01 | 31 | — |
| EUG→SFO Eugene to San Francisco | 2023-09-05 – 2023-09-28 | 24 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1236 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 463 records of UA1236 operating DEN → PHX, 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.