UA1129
UA1129 (United Airlines) is a multi-stop service on 17 routes, busiest Houston to Phoenix. Of 755 departures recorded from October 2024 to July 2026, 79.0% left on time, according to the US BTS.
- On-time departures79.0%of 755 flights
- Average delay14.2 min
- July 202631▼ 48.3%vs July 2025
- Cancelled0.8%
- Legs flown under this number17
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 | 28 | 25 | ▼ 10.7% |
| March | 55 | 31 | ▼ 43.6% |
| April | 60 | 30 | ▼ 50.0% |
| May | 52 | 31 | ▼ 40.4% |
| June | 35 | 53 | ▲ 51.4% |
| July | 60 | 31 | ▼ 48.3% |
| August | 25 | – | – |
| September | 19 | – | – |
| October | 29 | – | in progress |
| November | 20 | – | – |
| December | 28 | – | – |
| Year to date (Jan–Jul) | 321 | 232 | ▼ 27.7% |
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 | 93.3% | 80.0% | ▼ 14.3% |
| February | 92.9% | 80.0% | ▼ 13.8% |
| March | 83.6% | 71.0% | ▼ 15.1% |
| April | 86.7% | 93.3% | ▲ 7.7% |
| May | 86.5% | 90.3% | ▲ 4.4% |
| June | 50.0% | 81.1% | ▲ 62.3% |
| July | 47.5% | 87.1% | ▲ 83.5% |
| August | 60.9% | – | – |
| September | 79.0% | – | – |
| October | 75.9% | – | in progress |
| November | 75.0% | – | – |
| December | 64.3% | – | – |
| Year-to-date average (Jan–Jul) | 77.2% | 83.3% | ▲ 7.8% |
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 | 1 | 1 | 0.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 1 | 0 | ▼ 100.0% |
| August | 2 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 1 | ▼ 66.7% |
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 99.2% 749
- Cancelled 0.8% 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
10Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 30 | 30 | 86.7% | 0 |
| December 2024 | 31 | 31 | 93.6% | 0 |
| January 2025 | 31 | 30 | 93.3% | 1 |
| February 2025 | 28 | 28 | 92.9% | 0 |
| March 2025 | 55 | 55 | 83.6% | 0 |
| April 2025 | 60 | 60 | 86.7% | 0 |
| May 2025 | 52 | 52 | 86.5% | 0 |
| June 2025 | 35 | 34 | 50.0% | 1 |
| July 2025 | 60 | 59 | 47.5% | 1 |
| August 2025 | 25 | 23 | 60.9% | 2 |
| September 2025 | 19 | 19 | 79.0% | 0 |
| October 2025 | 29 | 29 | 75.9% | 0 |
| November 2025 | 20 | 20 | 75.0% | 0 |
| December 2025 | 28 | 28 | 64.3% | 0 |
| January 2026 | 31 | 30 | 80.0% | 1 |
| February 2026 | 25 | 25 | 80.0% | 0 |
| March 2026 | 31 | 31 | 71.0% | 0 |
| April 2026 | 30 | 30 | 93.3% | 0 |
| May 2026 | 31 | 31 | 90.3% | 0 |
| June 2026 | 53 | 53 | 81.1% | 0 |
| July 2026 | 31 | 31 | 87.1% | 0 |