Flight profile · Republic Airways
YX4531
Pittsburgh (PIT) to Raleigh–Durham (RDU) · scheduled 6:00 AM – 7:27 AM
How YX4531 performs
807 operations, 2023-07-02 to 2026-06-30.
YX4531 arrived on time 94.9% of the time, against 88.4% for all PIT → RDU flights — this specific departure is 6.5 percentage points better than the route as a whole. Against Republic Airways’s own flights on this route it is 5.6 points better.
Source: US DOT Bureau of Transportation Statistics · 807 operations between 2023-07-02 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| YX4531 | 94.9% | 0.62% | -12 min | 1.1% | 807 |
| Republic Airways on PIT → RDU | 89.2% | 0.93% | -11 min | 3.1% | 2,040 |
| All PIT → RDU flights | 88.4% | 1.21% | -11 min | 3.5% | 2,142 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-02 to 2026-06-30
Other routes YX4531 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 |
|---|---|---|---|
| MSP→ORD Minneapolis to Chicago | 2026-03-08 – 2026-04-06 | 30 | — |
| BTV→DCA Burlington to Washington | 2026-01-06 – 2026-02-11 | 37 | — |
| SDF→DCA Louisville to Washington | 2023-11-06 – 2024-04-03 | 138 | 82.4% |
Because the same number has served different journeys, the statistics above describe only the route YX4531 currently operates. Blending them would produce an average of two different flights.
Why YX4531 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
weather severe enough to stop this flight specifically
the inbound aircraft was late, so this flight started late
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for YX4531 on PIT → RDU. 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 807 records of YX4531 operating PIT → RDU, 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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