UA1591
UA1591 (United Airlines) is a multi-stop service on 12 routes, busiest Los Angeles to Houston. Of 810 departures recorded from October 2024 to July 2026, 81.2% left on time, according to the US BTS.
- On-time departures81.2%of 810 flights
- Average delay11.5 min
- July 202661▲ 103.3%vs July 2025
- Cancelled0.9%
- Legs flown under this number12
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 | 45 | ▲ 45.2% |
| February | 28 | 46 | ▲ 64.3% |
| March | 31 | 36 | ▲ 16.1% |
| April | 29 | 56 | ▲ 93.1% |
| May | 31 | 62 | ▲ 100.0% |
| June | 30 | 60 | ▲ 100.0% |
| July | 30 | 61 | ▲ 103.3% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 210 | 366 | ▲ 74.3% |
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 | 96.6% | 93.0% | ▼ 3.7% |
| February | 82.1% | 84.8% | ▲ 3.2% |
| March | 93.6% | 83.3% | ▼ 10.9% |
| April | 79.3% | 80.4% | ▲ 1.3% |
| May | 83.9% | 79.0% | ▼ 5.8% |
| June | 70.0% | 71.7% | ▲ 2.4% |
| July | 46.7% | 75.4% | ▲ 61.6% |
| August | 61.3% | – | – |
| September | 93.3% | – | – |
| October | 90.3% | – | in progress |
| November | 92.9% | – | – |
| December | 93.6% | – | – |
| Year-to-date average (Jan–Jul) | 78.9% | 81.1% | ▲ 2.8% |
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 | 2 | 2 | 0.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 2 | 0.0% |
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 99.1% 803
- Cancelled 0.9% 7
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| LAX IAH Los Angeles International Airport – George Bush Intercontinental Airport | 2,215 | 12.4 min | 82.5% | 374 |
| LAS LAX Harry Reid International Airport – Los Angeles International Airport | 380 | 2.1 min | 91.6% | 181 |
| IAH PIT George Bush Intercontinental Airport – Pittsburgh International Airport | 1,798 | 21.2 min | 70.4% | 71 |
| IAH ATL George Bush Intercontinental Airport – Hartsfield Jackson Atlanta International Airport | 1,108 | 11.7 min | 79.4% | 63 |
| IAH MIA George Bush Intercontinental Airport – Miami International Airport | 1,549 | 28.2 min | 49.1% | 53 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 30 | 30 | 80.0% | 0 |
| December 2024 | 31 | 30 | 80.0% | 1 |
| January 2025 | 31 | 29 | 96.6% | 2 |
| February 2025 | 28 | 28 | 82.1% | 0 |
| March 2025 | 31 | 31 | 93.6% | 0 |
| April 2025 | 29 | 29 | 79.3% | 0 |
| May 2025 | 31 | 31 | 83.9% | 0 |
| June 2025 | 30 | 30 | 70.0% | 0 |
| July 2025 | 30 | 30 | 46.7% | 0 |
| August 2025 | 31 | 31 | 61.3% | 0 |
| September 2025 | 30 | 30 | 93.3% | 0 |
| October 2025 | 31 | 31 | 90.3% | 0 |
| November 2025 | 30 | 28 | 92.9% | 2 |
| December 2025 | 31 | 31 | 93.6% | 0 |
| January 2026 | 45 | 43 | 93.0% | 2 |
| February 2026 | 46 | 46 | 84.8% | 0 |
| March 2026 | 36 | 36 | 83.3% | 0 |
| April 2026 | 56 | 56 | 80.4% | 0 |
| May 2026 | 62 | 62 | 79.0% | 0 |
| June 2026 | 60 | 60 | 71.7% | 0 |
| July 2026 | 61 | 61 | 75.4% | 0 |