Flight profile · United Airlines
UA1575
Denver (DEN) to Philadelphia (PHL) · scheduled 10:10 AM – 3:44 PM
How UA1575 performs
893 operations, 2023-07-01 to 2026-06-30.
UA1575 arrived on time 86.6% of the time, against 73.3% for all DEN → PHL flights — this specific departure is 13.3 percentage points better than the route as a whole. Against United Airlines’s own flights on this route it is 6.5 points better.
Source: US DOT Bureau of Transportation Statistics · 893 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1575 | 86.6% | 0.56% | -7 min | 4.4% | 893 |
| United Airlines on DEN → PHL | 80.1% | 0.54% | -6 min | 6.5% | 2,965 |
| All DEN → PHL flights | 73.3% | 1.16% | -2 min | 9.0% | 8,968 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does UA1575 run worse on particular days?
Wednesday is historically the most reliable day and Sunday the least, a gap of 5.8 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes UA1575 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 |
|---|---|---|---|
| IAH→DEN Houston to Denver | 2026-05-21 – 2026-06-30 | 41 | — |
| PHL→SFO Philadelphia to San Francisco | 2025-05-01 – 2026-06-29 | 241 | 61.8% |
| SDF→DEN Louisville to Denver | 2025-09-27 – 2025-09-27 | 1 | — |
| ONT→DEN Ontario to Denver | 2025-02-13 – 2025-08-18 | 131 | 91.6% |
| DEN→MIA Denver to Miami | 2025-08-01 – 2025-08-18 | 18 | — |
| DEN→SDF Denver to Louisville | 2025-06-26 – 2025-07-31 | 36 | — |
| GEG→DEN Spokane to Denver | 2024-10-27 – 2024-12-02 | 37 | — |
| PHL→ORD Philadelphia to Chicago | 2023-11-28 – 2024-09-25 | 45 | — |
| DSM→DEN Des Moines to Denver | 2024-06-27 – 2024-07-31 | 34 | — |
| SFO→DEN San Francisco to Denver | 2024-04-01 – 2024-05-01 | 31 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1575 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 893 records of UA1575 operating DEN → PHL, 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.