Flight profile · United Airlines
UA515
Newark (EWR) to San Antonio (SAT) · scheduled 12:30 PM – 3:21 PM
How UA515 performs
313 operations, 2025-08-19 to 2026-06-30.
UA515 arrived on time 87.4% of the time, against 84.9% for all EWR → SAT flights — this specific departure is 2.5 percentage points better than the route as a whole. Against United Airlines’s own flights on this route it is 2.4 points better.
Source: US DOT Bureau of Transportation Statistics · 313 operations between 2025-08-19 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA515 | 87.4% | 0.96% | -12 min | 3.2% | 313 |
| United Airlines on EWR → SAT | 85.0% | 0.56% | -12 min | 5.0% | 1,783 |
| All EWR → SAT flights | 84.9% | 0.80% | -12 min | 5.1% | 2,003 |
Source: FlyerIntel analysis of US DOT BTS data · 2025-08-19 to 2026-06-30
Other routes UA515 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 |
|---|---|---|---|
| SAT→IAH San Antonio to Houston | 2025-12-18 – 2026-05-20 | 133 | 82.6% |
| IAH→SEA Houston to Seattle | 2026-04-01 – 2026-04-29 | 29 | — |
| DEN→TPA Denver to Tampa | 2026-02-15 – 2026-03-01 | 3 | — |
| SAT→DEN San Antonio to Denver | 2025-08-19 – 2025-10-25 | 68 | — |
| BOS→EWR Boston to Newark | 2023-07-05 – 2025-08-18 | 568 | 89.9% |
| FLL→DEN Fort Lauderdale to Denver | 2024-12-19 – 2025-01-06 | 16 | — |
| SNA→DEN Santa Ana to Denver | 2024-12-24 – 2024-12-31 | 3 | — |
| EWR→ORD Newark to Chicago | 2024-05-23 – 2024-10-26 | 105 | 78.1% |
| ORD→LAX Chicago to Los Angeles | 2024-09-26 – 2024-10-26 | 31 | — |
| TPA→EWR Tampa to Newark | 2024-09-26 – 2024-10-26 | 31 | — |
| ORD→DFW Chicago to Dallas–Fort Worth | 2024-06-27 – 2024-08-18 | 44 | — |
| ORD→IND Chicago to Indianapolis | 2024-05-23 – 2024-05-24 | 2 | — |
| EWR→ATL Newark to Atlanta | 2024-02-15 – 2024-03-06 | 18 | — |
| ORD→DEN Chicago to Denver | 2023-11-28 – 2023-12-20 | 23 | — |
| SEA→ORD Seattle to Chicago | 2023-11-26 – 2023-11-26 | 1 | — |
| CLE→IAD Cleveland to Washington | 2023-10-29 – 2023-11-24 | 2 | — |
| ORD→EWR Chicago to Newark | 2023-11-04 – 2023-11-18 | 4 | — |
| EWR→BNA Newark to Nashville | 2023-10-30 – 2023-10-31 | 2 | — |
| LAX→IAH Los Angeles to Houston | 2023-10-01 – 2023-10-28 | 28 | — |
| EWR→DEN Newark to Denver | 2023-09-05 – 2023-09-15 | 11 | — |
| LAX→SAN Los Angeles to San Diego | 2023-07-01 – 2023-09-03 | 11 | — |
| DEN→COS Denver to Colorado Springs | 2023-07-03 – 2023-07-03 | 1 | — |
Because the same number has served different journeys, the statistics above describe only the route UA515 currently operates. Blending them would produce an average of two different flights.
Why UA515 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding, fuelling — within the carrier’s control
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for UA515 on EWR → SAT. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Data and methodology
Calculated by FlyerIntel from 313 records of UA515 operating EWR → 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.