Flight profile · Republic Airways
YX4637
Philadelphia (PHL) to Indianapolis (IND) · scheduled 6:40 PM – 9:00 PM
How YX4637 performs
511 operations, 2024-09-05 to 2026-06-30.
YX4637 arrived on time 74.7% of the time, against 78.2% for all PHL → IND flights — this specific departure is 3.5 percentage points worse than the route as a whole. Against Republic Airways’s own flights on this route it is 7.2 points worse.
Source: US DOT Bureau of Transportation Statistics · 511 operations between 2024-09-05 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| YX4637 | 74.7% | 4.50% | -7 min | 8.8% | 511 |
| Republic Airways on PHL → IND | 82.0% | 2.50% | -11 min | 6.6% | 2,003 |
| All PHL → IND flights | 78.2% | 2.51% | -9 min | 8.5% | 4,663 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-09-05 to 2026-06-30
Other routes YX4637 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 |
|---|---|---|---|
| ORD→ATL Chicago to Atlanta | 2025-04-04 – 2025-05-03 | 30 | — |
| IND→ORD Indianapolis to Chicago | 2024-11-05 – 2024-12-04 | 12 | — |
| ORD→IND Chicago to Indianapolis | 2024-11-06 – 2024-12-04 | 11 | — |
| BNA→PHL Nashville to Philadelphia | 2024-04-06 – 2024-05-04 | 5 | — |
| PHL→BNA Philadelphia to Nashville | 2024-04-06 – 2024-05-04 | 5 | — |
| ORD→LGA Chicago to New York | 2024-03-09 – 2024-03-30 | 4 | — |
| BOS→LGA Boston to New York | 2024-02-17 – 2024-03-02 | 3 | — |
| LGA→BOS New York to Boston | 2024-02-17 – 2024-03-02 | 3 | — |
| BNA→DCA Nashville to Washington | 2023-12-10 – 2023-12-17 | 2 | — |
Because the same number has served different journeys, the statistics above describe only the route YX4637 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 511 records of YX4637 operating PHL → IND, 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.