UA1575
UA1575 (United Airlines) is a multi-stop service on 8 routes, busiest Denver to Philadelphia. Of 1,011 departures recorded from October 2024 to July 2026, 81.3% left on time, according to the US BTS.
- On-time departures81.3%of 1,011 flights
- Average delay13.8 min
- July 202682▲ 32.3%vs July 2025
- Cancelled0.3%
- Legs flown under this number8
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 31 | 31 | 0.0% |
| February | 44 | 24 | ▼ 45.5% |
| March | 36 | 55 | ▲ 52.8% |
| April | 30 | 56 | ▲ 86.7% |
| May | 70 | 70 | 0.0% |
| June | 35 | 82 | ▲ 134.3% |
| July | 62 | 82 | ▲ 32.3% |
| August | 44 | – | – |
| September | 29 | – | – |
| October | 58 | – | in progress |
| November | 59 | – | – |
| December | 32 | – | – |
| Year to date (Jan–Jul) | 308 | 400 | ▲ 29.9% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 67.7% | 83.3% | ▲ 23.0% |
| February | 90.9% | 79.2% | ▼ 12.9% |
| March | 97.2% | 76.4% | ▼ 21.5% |
| April | 70.0% | 73.2% | ▲ 4.6% |
| May | 90.0% | 70.0% | ▼ 22.2% |
| June | 82.9% | 72.0% | ▼ 13.2% |
| July | 90.3% | 71.3% | ▼ 21.1% |
| August | 81.8% | – | – |
| September | 82.8% | – | – |
| October | 87.9% | – | in progress |
| November | 84.8% | – | – |
| December | 71.9% | – | – |
| Year-to-date average (Jan–Jul) | 84.1% | 75.0% | ▼ 10.8% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 2 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 3 |
according to the US BTS · October 2024 → July 2026
This is a historical record of departures already flown, not a forecast for your flight.
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.7% 1,008
- Cancelled 0.3% 3
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN PHL Denver International Airport – Philadelphia International Airport | 2,501 | 4.1 min | 87.0% | 455 |
| PHL SFO Philadelphia International Airport – San Francisco International Airport | 4,048 | 38.0 min | 62.3% | 261 |
| ONT DEN Ontario International Airport – Denver International Airport | 1,316 | 5.8 min | 90.1% | 131 |
| IAH DEN George Bush Intercontinental Airport – Denver International Airport | 1,387 | 7.4 min | 85.9% | 72 |
| GEG DEN Spokane International Airport – Denver International Airport | 1,343 | 3.9 min | 97.3% | 37 |
| DEN SDF Denver International Airport – Louisville Muhammad Ali International Airport | 1,644 | 13.1 min | 88.9% | 36 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 30 | 30 | 96.7% | 0 |
| December 2024 | 31 | 31 | 96.8% | 0 |
| January 2025 | 31 | 31 | 67.7% | 0 |
| February 2025 | 44 | 44 | 90.9% | 0 |
| March 2025 | 36 | 36 | 97.2% | 0 |
| April 2025 | 30 | 30 | 70.0% | 0 |
| May 2025 | 70 | 70 | 90.0% | 0 |
| June 2025 | 35 | 35 | 82.9% | 0 |
| July 2025 | 62 | 62 | 90.3% | 0 |
| August 2025 | 44 | 44 | 81.8% | 0 |
| September 2025 | 29 | 29 | 82.8% | 0 |
| October 2025 | 58 | 58 | 87.9% | 0 |
| November 2025 | 59 | 59 | 84.8% | 0 |
| December 2025 | 32 | 32 | 71.9% | 0 |
| January 2026 | 31 | 30 | 83.3% | 1 |
| February 2026 | 24 | 24 | 79.2% | 0 |
| March 2026 | 55 | 55 | 76.4% | 0 |
| April 2026 | 56 | 56 | 73.2% | 0 |
| May 2026 | 70 | 70 | 70.0% | 0 |
| June 2026 | 82 | 82 | 72.0% | 0 |
| July 2026 | 82 | 80 | 71.3% | 2 |