YX4654
YX4654 (Republic Airways) is a multi-stop service on 16 routes, busiest Louisville to New York. Of 765 departures recorded from October 2024 to July 2026, 82.2% left on time, according to the US BTS.
- On-time departures82.2%of 765 flights
- Average delay8.3 min
- July 202630▼ 3.2%vs July 2025
- Cancelled2.1%
- Legs flown under this number16
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 48 | 30 | ▼ 37.5% |
| February | 50 | 28 | ▼ 44.0% |
| March | 57 | 49 | ▼ 14.0% |
| April | 52 | 34 | ▼ 34.6% |
| May | 51 | 21 | ▼ 58.8% |
| June | 33 | 30 | ▼ 9.1% |
| July | 31 | 30 | ▼ 3.2% |
| August | 5 | – | – |
| September | 20 | – | – |
| October | 46 | – | in progress |
| November | 7 | – | – |
| December | 11 | – | – |
| Year to date (Jan–Jul) | 322 | 222 | ▼ 31.1% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 82.6% | 89.7% | ▲ 8.5% |
| February | 74.0% | 70.4% | ▼ 4.9% |
| March | 91.2% | 53.2% | ▼ 41.7% |
| April | 88.5% | 87.9% | ▼ 0.7% |
| May | 78.4% | 90.5% | ▲ 15.4% |
| June | 74.2% | 83.3% | ▲ 12.3% |
| July | 69.2% | 92.9% | ▲ 34.1% |
| August | 60.0% | – | – |
| September | 80.0% | – | – |
| October | 91.3% | – | in progress |
| November | 71.4% | – | – |
| December | 63.6% | – | – |
| Year-to-date average (Jan–Jul) | 79.7% | 81.1% | ▲ 1.7% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 1 | ▼ 50.0% |
| February | 0 | 1 | – |
| March | 0 | 2 | – |
| April | 0 | 1 | – |
| May | 0 | 0 | – |
| June | 2 | 0 | ▼ 100.0% |
| July | 5 | 2 | ▼ 60.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 9 | 7 | ▼ 22.2% |
according to the US BTS · October 2024 → July 2026
This is a historical record of departures already flown, not a forecast for your flight.
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 97.9% 749
- Cancelled 2.1% 16
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SDF LGA Louisville Muhammad Ali International Airport – LaGuardia Airport | 1,058 | 6.4 min | 84.7% | 203 |
| LGA SDF LaGuardia Airport – Louisville Muhammad Ali International Airport | 1,058 | 2.2 min | 87.6% | 194 |
| LGA DCA LaGuardia Airport – Ronald Reagan Washington National Airport | 345 | 2.2 min | 87.0% | 71 |
| JFK BOS John F. Kennedy International Airport – Boston Logan International Airport | 300 | 28.8 min | 67.3% | 62 |
| SDF PHL Louisville Muhammad Ali International Airport – Philadelphia International Airport | 926 | -4.6 min | 91.4% | 36 |
| DCA BOS Ronald Reagan Washington National Airport – Boston Logan International Airport | 641 | -2.6 min | 94.1% | 34 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 34 | 34 | 91.2% | 0 |
| November 2024 | 48 | 48 | 89.6% | 0 |
| December 2024 | 50 | 50 | 92.0% | 0 |
| January 2025 | 48 | 46 | 82.6% | 2 |
| February 2025 | 50 | 50 | 74.0% | 0 |
| March 2025 | 57 | 57 | 91.2% | 0 |
| April 2025 | 52 | 52 | 88.5% | 0 |
| May 2025 | 51 | 51 | 78.4% | 0 |
| June 2025 | 33 | 31 | 74.2% | 2 |
| July 2025 | 31 | 26 | 69.2% | 5 |
| August 2025 | 5 | 5 | 60.0% | 0 |
| September 2025 | 20 | 20 | 80.0% | 0 |
| October 2025 | 46 | 46 | 91.3% | 0 |
| November 2025 | 7 | 7 | 71.4% | 0 |
| December 2025 | 11 | 11 | 63.6% | 0 |
| January 2026 | 30 | 29 | 89.7% | 1 |
| February 2026 | 28 | 27 | 70.4% | 1 |
| March 2026 | 49 | 47 | 53.2% | 2 |
| April 2026 | 34 | 33 | 87.9% | 1 |
| May 2026 | 21 | 21 | 90.5% | 0 |
| June 2026 | 30 | 30 | 83.3% | 0 |
| July 2026 | 30 | 28 | 92.9% | 2 |