Flight profile · Republic Airways
YX4603
Chicago (ORD) to Louisville (SDF) · scheduled 8:20 PM – 11:03 PM
How YX4603 performs
552 operations, 2024-04-04 to 2026-06-30.
YX4603 arrived on time 69.2% of the time, against 78.0% for all ORD → SDF flights — this specific departure is 8.8 percentage points worse than the route as a whole. Against Republic Airways’s own flights on this route it is 9.2 points worse.
Source: US DOT Bureau of Transportation Statistics · 552 operations between 2024-04-04 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| YX4603 | 69.2% | 3.08% | -5 min | 13.5% | 552 |
| Republic Airways on ORD → SDF | 78.5% | 2.31% | -8 min | 8.0% | 4,156 |
| All ORD → SDF flights | 78.0% | 1.99% | -7 min | 8.0% | 7,034 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-04-04 to 2026-06-30
Other routes YX4603 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 |
|---|---|---|---|
| BUF→LGA Buffalo to New York | 2026-04-07 – 2026-05-20 | 44 | — |
| CAE→LGA Columbia to New York | 2026-03-09 – 2026-04-06 | 21 | — |
| DCA→ORD Washington to Chicago | 2026-02-12 – 2026-03-07 | 24 | — |
| DCA→LGA Washington to New York | 2024-10-08 – 2024-10-29 | 4 | — |
| CMH→DCA Columbus to Washington | 2024-10-07 – 2024-10-07 | 1 | — |
| PHL→LGA Philadelphia to New York | 2024-09-04 – 2024-10-06 | 33 | — |
| RIC→LGA Richmond to New York | 2023-11-05 – 2024-04-03 | 114 | 87.4% |
| CHO→LGA Charlottesville to New York | 2023-12-20 – 2023-12-22 | 3 | — |
| IND→PHL Indianapolis to Philadelphia | 2023-07-01 – 2023-07-01 | 1 | — |
Because the same number has served different journeys, the statistics above describe only the route YX4603 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 552 records of YX4603 operating ORD → SDF, 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.