UA1589
UA1589 (United Airlines) is a multi-stop service on 9 routes, busiest Houston to San Antonio. Of 211 departures recorded from October 2024 to May 2026, 79.0% left on time, according to the US BTS.
- On-time departures79.0%of 211 flights
- Average delay17.1 min
- May 202617▲ 13.3%vs May 2025
- Cancelled1.0%
- Legs flown under this number9
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods11 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 25 | 26 | ▲ 4.0% |
| February | 12 | 11 | ▼ 8.3% |
| March | – | – | – |
| April | – | 2 | – |
| May | 15 | 17 | ▲ 13.3% |
| June | – | – | – |
| July | – | – | – |
| August | 9 | – | – |
| September | 22 | – | – |
| October | 25 | – | in progress |
| November | – | – | – |
| December | 16 | – | – |
according to the US BTS · October 2024 → May 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods11 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 79.2% | 88.5% | ▲ 11.7% |
| February | 75.0% | 100.0% | ▲ 33.3% |
| March | – | – | – |
| April | – | 0.0% | – |
| May | 21.4% | 76.5% | ▲ 256.8% |
| June | – | – | – |
| July | – | – | – |
| August | 100.0% | – | – |
| September | 81.8% | – | – |
| October | 92.0% | – | in progress |
| November | – | – | – |
| December | 93.8% | – | – |
according to the US BTS · October 2024 → May 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → May 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods11 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | – | – | – |
| April | – | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | – | – | – |
| July | – | – | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | – | – | – |
| December | 0 | – | – |
according to the US BTS · October 2024 → May 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% 209
- Cancelled 0.9% 2
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → May 20, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| IAH SAT George Bush Intercontinental Airport – San Antonio International Airport | 306 | 8.6 min | 82.4% | 52 |
| PHX ORD Phoenix Sky Harbor International Airport – Chicago O'Hare International Airport | 2,313 | 4.3 min | 87.5% | 48 |
| IAH PHX George Bush Intercontinental Airport – Phoenix Sky Harbor International Airport | 1,620 | 1.7 min | 91.9% | 37 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 15 | 15 | 93.3% | 0 |
| December 2024 | 16 | 16 | 50.0% | 0 |
| January 2025 | 25 | 24 | 79.2% | 1 |
| February 2025 | 12 | 12 | 75.0% | 0 |
| May 2025 | 15 | 14 | 21.4% | 1 |
| August 2025 | 9 | 9 | 100.0% | 0 |
| September 2025 | 22 | 22 | 81.8% | 0 |
| October 2025 | 25 | 25 | 92.0% | 0 |
| December 2025 | 16 | 16 | 93.8% | 0 |
| January 2026 | 26 | 26 | 88.5% | 0 |
| February 2026 | 11 | 11 | 100.0% | 0 |
| April 2026 | 2 | 2 | 0.0% | 0 |
| May 2026 | 17 | 17 | 76.5% | 0 |