YX4668
YX4668 (Republic Airways) is a multi-stop service on 28 routes, busiest Louisville to Chicago. Of 499 departures recorded from November 2024 to July 2026, 84.9% left on time, according to the US BTS.
- On-time departures84.9%of 499 flights
- Average delay8.4 min
- July 202662▲ 313.3%vs July 2025
- Cancelled6.0%
- Legs flown under this number28
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 | 8 | 3 | ▼ 62.5% |
| February | 15 | 3 | ▼ 80.0% |
| March | 21 | 8 | ▼ 61.9% |
| April | 26 | 23 | ▼ 11.5% |
| May | 3 | 39 | ▲ 1,200.0% |
| June | 44 | 60 | ▲ 36.4% |
| July | 15 | 62 | ▲ 313.3% |
| August | 28 | – | – |
| September | 56 | – | – |
| October | 36 | – | in progress |
| November | 22 | – | – |
| December | 20 | – | – |
| Year to date (Jan–Jul) | 132 | 198 | ▲ 50.0% |
according to the US BTS · November 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 | 87.5% | 100.0% | ▲ 14.3% |
| February | 100.0% | 100.0% | 0.0% |
| March | 90.5% | 87.5% | ▼ 3.3% |
| April | 96.2% | 91.3% | ▼ 5.0% |
| May | 66.7% | 100.0% | ▲ 50.0% |
| June | 40.6% | 79.3% | ▲ 95.1% |
| July | 76.9% | 75.9% | ▼ 1.4% |
| August | 69.2% | – | – |
| September | 96.4% | – | – |
| October | 86.1% | – | in progress |
| November | 95.5% | – | – |
| December | 100.0% | – | – |
| Year-to-date average (Jan–Jul) | 79.8% | 90.6% | ▲ 13.5% |
according to the US BTS · November 2024 → July 2026
Average departure delay by month
according to the US BTS · November 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 12 | 7 | ▼ 41.7% |
| July | 2 | 4 | ▲ 100.0% |
| August | 2 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 14 | 12 | ▼ 14.3% |
according to the US BTS · November 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 94.0% 469
- Cancelled 6.0% 30
Share of all recorded flights in the period, all legs. · Nov 22, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SDF ORD Louisville Muhammad Ali International Airport – Chicago O'Hare International Airport | 462 | 13.1 min | 82.5% | 70 |
| ORD SDF Chicago O'Hare International Airport – Louisville Muhammad Ali International Airport | 462 | 7.8 min | 81.8% | 70 |
| PVD DCA Rhode Island T. F. Green International Airport – Ronald Reagan Washington National Airport | 573 | -0.3 min | 93.4% | 61 |
| LGA RDU LaGuardia Airport – Raleigh-Durham International Airport | 693 | 0.4 min | 94.6% | 38 |
| CMH ORD John Glenn Columbus International Airport – Chicago O'Hare International Airport | 475 | -2.8 min | 96.8% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| November 2024 | 2 | 2 | 100.0% | 0 |
| December 2024 | 5 | 5 | 100.0% | 0 |
| January 2025 | 8 | 8 | 87.5% | 0 |
| February 2025 | 15 | 15 | 100.0% | 0 |
| March 2025 | 21 | 21 | 90.5% | 0 |
| April 2025 | 26 | 26 | 96.2% | 0 |
| May 2025 | 3 | 3 | 66.7% | 0 |
| June 2025 | 44 | 32 | 40.6% | 12 |
| July 2025 | 15 | 13 | 76.9% | 2 |
| August 2025 | 28 | 26 | 69.2% | 2 |
| September 2025 | 56 | 56 | 96.4% | 0 |
| October 2025 | 36 | 36 | 86.1% | 0 |
| November 2025 | 22 | 22 | 95.5% | 0 |
| December 2025 | 20 | 18 | 100.0% | 2 |
| January 2026 | 3 | 3 | 100.0% | 0 |
| February 2026 | 3 | 3 | 100.0% | 0 |
| March 2026 | 8 | 8 | 87.5% | 0 |
| April 2026 | 23 | 23 | 91.3% | 0 |
| May 2026 | 39 | 38 | 100.0% | 1 |
| June 2026 | 60 | 53 | 79.3% | 7 |
| July 2026 | 62 | 58 | 75.9% | 4 |