Flight profile · United Airlines
UA1591
Los Angeles (LAX) to Houston (IAH) · scheduled 1:10 PM – 6:28 PM
How UA1591 performs
397 operations, 2024-08-19 to 2026-06-30.
UA1591 arrived on time 78.6% of the time, against 85.4% for all LAX → IAH flights — this specific departure is 6.8 percentage points worse than the route as a whole. Against United Airlines’s own flights on this route it is 9.3 points worse.
Source: US DOT Bureau of Transportation Statistics · 397 operations between 2024-08-19 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1591 | 78.6% | 1.01% | -3 min | 6.6% | 397 |
| United Airlines on LAX → IAH | 87.9% | 1.03% | -11 min | 3.8% | 10,198 |
| All LAX → IAH flights | 85.4% | 1.06% | -9 min | 5.0% | 16,063 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-08-19 to 2026-06-30
Other routes UA1591 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| IAH→PIT Houston to Pittsburgh | 2026-05-21 – 2026-06-30 | 41 | — |
| IAH→ATL Houston to Atlanta | 2024-05-23 – 2026-05-20 | 137 | 69.4% |
| LAS→LAX Las Vegas to Los Angeles | 2025-03-31 – 2026-02-11 | 181 | 86.0% |
| EWR→LAS Newark to Las Vegas | 2026-01-08 – 2026-02-09 | 20 | — |
| ORF→ORD Norfolk to Chicago | 2025-12-20 – 2026-01-03 | 3 | — |
| MSN→ORD Madison to Chicago | 2025-09-02 – 2025-09-24 | 23 | — |
| LAX→EWR Los Angeles to Newark | 2025-08-19 – 2025-09-01 | 14 | — |
| IAH→MIA Houston to Miami | 2025-06-26 – 2025-08-18 | 53 | — |
| EWR→PBI Newark to West Palm Beach | 2025-04-20 – 2025-04-27 | 2 | — |
| JAX→EWR Jacksonville to Newark | 2025-04-13 – 2025-04-26 | 3 | — |
| ORD→JAC Chicago to Jackson | 2025-03-30 – 2025-04-06 | 3 | — |
| RSW→IAH Fort Myers to Houston | 2024-06-27 – 2024-08-18 | 53 | — |
| PDX→IAH Portland to Houston | 2024-05-23 – 2024-06-26 | 35 | — |
| DEN→EWR Denver to Newark | 2023-07-01 – 2024-05-22 | 303 | 72.5% |
| DEN→SFO Denver to San Francisco | 2024-03-07 – 2024-03-30 | 24 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1591 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 397 records of UA1591 operating LAX → IAH, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.