UA1510
UA1510 (United Airlines) is a multi-stop service on 11 routes, busiest Louisville to Denver. Of 928 departures recorded from October 2024 to July 2026, 78.4% left on time, according to the US BTS.
- On-time departures78.4%of 928 flights
- Average delay13.6 min
- July 202660▲ 93.5%vs July 2025
- Cancelled0.7%
- Legs flown under this number11
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 | 43 | 31 | ▼ 27.9% |
| February | 43 | 28 | ▼ 34.9% |
| March | 62 | 31 | ▼ 50.0% |
| April | 60 | 31 | ▼ 48.3% |
| May | 31 | 62 | ▲ 100.0% |
| June | 30 | 60 | ▲ 100.0% |
| July | 31 | 60 | ▲ 93.5% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 300 | 303 | ▲ 1.0% |
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 | 72.1% | 79.3% | ▲ 10.0% |
| February | 95.2% | 60.7% | ▼ 36.3% |
| March | 83.9% | 86.7% | ▲ 3.3% |
| April | 71.7% | 90.0% | ▲ 25.6% |
| May | 54.8% | 85.5% | ▲ 55.9% |
| June | 66.7% | 71.2% | ▲ 6.8% |
| July | 71.0% | 65.0% | ▼ 8.4% |
| August | 80.7% | – | – |
| September | 93.3% | – | – |
| October | 93.6% | – | in progress |
| November | 93.1% | – | – |
| December | 64.5% | – | – |
| Year-to-date average (Jan–Jul) | 73.6% | 76.9% | ▲ 4.5% |
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 | 2 | – |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 1 | – |
| April | 0 | 1 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 5 | ▲ 400.0% |
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 99.4% 922
- Cancelled 0.6% 6
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 |
|---|---|---|---|---|
| SDF DEN Louisville Muhammad Ali International Airport – Denver International Airport | 1,644 | 11.9 min | 80.4% | 434 |
| DEN BOS Denver International Airport – Boston Logan International Airport | 2,816 | 9.8 min | 80.8% | 168 |
| DEN PHL Denver International Airport – Philadelphia International Airport | 2,501 | 35.6 min | 65.2% | 92 |
| TUS DEN Tucson International Airport – Denver International Airport | 1,029 | 13.3 min | 70.1% | 77 |
| MEM DEN Frederick W. Smith International Airport – Denver International Airport | 1,401 | 8.3 min | 83.3% | 36 |
| SAN DEN San Diego International Airport – Denver International Airport | 1,371 | 17.6 min | 76.5% | 34 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 40 | 40 | 92.5% | 0 |
| November 2024 | 58 | 58 | 77.6% | 0 |
| December 2024 | 75 | 75 | 80.0% | 0 |
| January 2025 | 43 | 43 | 72.1% | 0 |
| February 2025 | 43 | 42 | 95.2% | 1 |
| March 2025 | 62 | 62 | 83.9% | 0 |
| April 2025 | 60 | 60 | 71.7% | 0 |
| May 2025 | 31 | 31 | 54.8% | 0 |
| June 2025 | 30 | 30 | 66.7% | 0 |
| July 2025 | 31 | 31 | 71.0% | 0 |
| August 2025 | 31 | 31 | 80.7% | 0 |
| September 2025 | 30 | 30 | 93.3% | 0 |
| October 2025 | 31 | 31 | 93.6% | 0 |
| November 2025 | 29 | 29 | 93.1% | 0 |
| December 2025 | 31 | 31 | 64.5% | 0 |
| January 2026 | 31 | 29 | 79.3% | 2 |
| February 2026 | 28 | 28 | 60.7% | 0 |
| March 2026 | 31 | 30 | 86.7% | 1 |
| April 2026 | 31 | 30 | 90.0% | 1 |
| May 2026 | 62 | 62 | 85.5% | 0 |
| June 2026 | 60 | 59 | 71.2% | 1 |
| July 2026 | 60 | 60 | 65.0% | 0 |