Flight profile · United Airlines
UA315
Houston (IAH) to Pittsburgh (PIT) · scheduled 12:00 PM – 3:56 PM
How UA315 performs
114 operations, 2026-02-12 to 2026-06-30.
UA315 arrived on time 85.0% of the time, against 79.3% for all IAH → PIT flights — this specific departure is 5.7 percentage points better than the route as a whole. Against United Airlines’s own flights on this route it is 6.1 points better.
Source: US DOT Bureau of Transportation Statistics · 114 operations between 2026-02-12 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA315 | 85.0% | 0.00% | -11 min | 8.0% | 114 |
| United Airlines on IAH → PIT | 78.9% | 0.75% | -5 min | 8.3% | 1,874 |
| All IAH → PIT flights | 79.3% | 1.10% | -5 min | 8.3% | 1,998 |
Source: FlyerIntel analysis of US DOT BTS data · 2026-02-12 to 2026-06-30
Other routes UA315 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 |
|---|---|---|---|
| BNA→IAH Nashville to Houston | 2026-04-04 – 2026-04-04 | 1 | — |
| IAD→ORF Washington to Norfolk | 2026-03-05 – 2026-03-28 | 24 | — |
| SFO→IAH San Francisco to Houston | 2026-02-12 – 2026-03-04 | 21 | — |
| FLL→IAD Fort Lauderdale to Washington | 2023-07-01 – 2026-02-11 | 926 | 84.9% |
| IAD→BOS Washington to Boston | 2025-08-19 – 2025-09-01 | 11 | — |
| IAD→PHX Washington to Phoenix | 2025-05-22 – 2025-05-31 | 10 | — |
| IAD→SFO Washington to San Francisco | 2024-10-27 – 2024-12-02 | 33 | — |
| IAD→LAS Washington to Las Vegas | 2024-07-01 – 2024-07-31 | 8 | — |
| ORD→FLL Chicago to Fort Lauderdale | 2023-07-01 – 2023-10-28 | 94 | 91.5% |
| LAS→ORD Las Vegas to Chicago | 2023-07-01 – 2023-07-31 | 27 | — |
Because the same number has served different journeys, the statistics above describe only the route UA315 currently operates. Blending them would produce an average of two different flights.
Why UA315 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding, fuelling — within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for UA315 on IAH → PIT. 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 114 records of UA315 operating IAH → PIT, 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.
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