Flight profile · United Airlines
UA1542
Houston (IAH) to San Antonio (SAT) · scheduled 8:10 PM – 9:20 PM
How UA1542 performs
433 operations, 2025-03-30 to 2026-06-30.
UA1542 arrived on time 74.9% of the time, against 79.3% for all IAH → SAT flights — this specific departure is 4.3 percentage points worse than the route as a whole. Against United Airlines’s own flights on this route it is 4.4 points worse.
Source: US DOT Bureau of Transportation Statistics · 433 operations between 2025-03-30 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1542 | 74.9% | 1.39% | -5 min | 8.7% | 433 |
| United Airlines on IAH → SAT | 79.4% | 1.36% | -6 min | 7.5% | 6,327 |
| All IAH → SAT flights | 79.3% | 1.37% | -6 min | 7.6% | 6,810 |
Source: FlyerIntel analysis of US DOT BTS data · 2025-03-30 to 2026-06-30
Other routes UA1542 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 |
|---|---|---|---|
| ABQ→ORD Albuquerque to Chicago | 2026-03-05 – 2026-03-28 | 23 | — |
| PDX→IAH Portland to Houston | 2025-10-26 – 2025-12-01 | 36 | — |
| LAS→LAX Las Vegas to Los Angeles | 2025-08-19 – 2025-09-01 | 14 | — |
| LAX→IAH Los Angeles to Houston | 2025-08-19 – 2025-09-01 | 14 | — |
| MIA→IAH Miami to Houston | 2025-05-01 – 2025-05-21 | 21 | — |
| JAX→EWR Jacksonville to Newark | 2025-02-13 – 2025-03-29 | 42 | — |
| DEN→SBA Denver to Santa Barbara | 2024-06-27 – 2025-02-12 | 231 | 86.6% |
| RDU→DEN Raleigh–Durham to Denver | 2025-01-07 – 2025-02-12 | 37 | — |
| XNA→DEN Fayetteville/Springdale/Rogers to Denver | 2024-06-27 – 2024-06-30 | 4 | — |
| IAD→IAH Washington to Houston | 2024-05-02 – 2024-05-22 | 21 | — |
| IAH→RDU Houston to Raleigh–Durham | 2024-03-31 – 2024-05-01 | 32 | — |
| ORD→IAH Chicago to Houston | 2024-03-31 – 2024-05-01 | 32 | — |
| EWR→PBI Newark to West Palm Beach | 2024-03-07 – 2024-03-30 | 24 | — |
| LAS→EWR Las Vegas to Newark | 2024-02-15 – 2024-03-06 | 21 | — |
| EWR→BOS Newark to Boston | 2024-01-09 – 2024-02-14 | 37 | — |
| HDN→DEN Hayden to Denver | 2023-12-21 – 2024-01-08 | 19 | — |
| LAX→EWR Los Angeles to Newark | 2023-11-28 – 2023-12-20 | 23 | — |
| SAT→IAH San Antonio to Houston | 2023-10-29 – 2023-11-27 | 30 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1542 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 433 records of UA1542 operating IAH → SAT, 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.