YX4458
YX4458 (Republic Airways) is a multi-stop service on 21 routes, busiest Washington to St Louis. Of 661 departures recorded from October 2024 to July 2026, 81.0% left on time, according to the US BTS.
- On-time departures81.0%of 661 flights
- Average delay9.3 min
- July 202627▼ 10.0%vs July 2025
- Cancelled5.5%
- Legs flown under this number21
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 | 53 | 57 | ▲ 7.5% |
| February | 22 | 42 | ▲ 90.9% |
| March | 1 | 32 | ▲ 3,100.0% |
| April | 10 | 7 | ▼ 30.0% |
| May | 13 | 23 | ▲ 76.9% |
| June | 30 | 26 | ▼ 13.3% |
| July | 30 | 27 | ▼ 10.0% |
| August | 27 | – | – |
| September | 13 | – | – |
| October | 46 | – | in progress |
| November | 42 | – | – |
| December | 37 | – | – |
| Year to date (Jan–Jul) | 159 | 214 | ▲ 34.6% |
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 | 93.8% | 82.0% | ▼ 12.5% |
| February | 66.7% | 82.5% | ▲ 23.7% |
| March | 100.0% | 83.9% | ▼ 16.1% |
| April | 90.0% | 100.0% | ▲ 11.1% |
| May | 84.6% | 73.9% | ▼ 12.7% |
| June | 54.2% | 76.0% | ▲ 40.3% |
| July | 50.0% | 60.9% | ▲ 21.7% |
| August | 80.8% | – | – |
| September | 76.9% | – | – |
| October | 84.8% | – | in progress |
| November | 83.3% | – | – |
| December | 78.4% | – | – |
| Year-to-date average (Jan–Jul) | 77.0% | 79.9% | ▲ 3.7% |
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 | 5 | 7 | ▲ 40.0% |
| February | 1 | 2 | ▲ 100.0% |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 6 | 1 | ▼ 83.3% |
| July | 8 | 4 | ▼ 50.0% |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 20 | 15 | ▼ 25.0% |
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 94.6% 625
- Cancelled 5.4% 36
Share of all recorded flights in the period, all legs. · Oct 13, 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 |
|---|---|---|---|---|
| DCA STL Ronald Reagan Washington National Airport – St. Louis Lambert International Airport | 1,154 | 3.5 min | 86.5% | 148 |
| STL DCA St. Louis Lambert International Airport – Ronald Reagan Washington National Airport | 1,154 | 7.9 min | 84.4% | 147 |
| LGA IND LaGuardia Airport – Indianapolis International Airport | 1,060 | 23.4 min | 67.0% | 138 |
| DCA BNA Ronald Reagan Washington National Airport – Nashville International Airport | 903 | 4.1 min | 81.0% | 42 |
| BNA DCA Nashville International Airport – Ronald Reagan Washington National Airport | 903 | -4.7 min | 95.1% | 41 |
| BWI ORD Baltimore/Washington International Thurgood Marshall Airport – Chicago O'Hare International Airport | 998 | -4.0 min | 96.6% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 33 | 33 | 93.9% | 0 |
| November 2024 | 46 | 46 | 91.3% | 0 |
| December 2024 | 44 | 44 | 86.4% | 0 |
| January 2025 | 53 | 48 | 93.8% | 5 |
| February 2025 | 22 | 21 | 66.7% | 1 |
| March 2025 | 1 | 1 | 100.0% | 0 |
| April 2025 | 10 | 10 | 90.0% | 0 |
| May 2025 | 13 | 13 | 84.6% | 0 |
| June 2025 | 30 | 24 | 54.2% | 6 |
| July 2025 | 30 | 22 | 50.0% | 8 |
| August 2025 | 27 | 26 | 80.8% | 1 |
| September 2025 | 13 | 13 | 76.9% | 0 |
| October 2025 | 46 | 46 | 84.8% | 0 |
| November 2025 | 42 | 42 | 83.3% | 0 |
| December 2025 | 37 | 37 | 78.4% | 0 |
| January 2026 | 57 | 50 | 82.0% | 7 |
| February 2026 | 42 | 40 | 82.5% | 2 |
| March 2026 | 32 | 31 | 83.9% | 1 |
| April 2026 | 7 | 7 | 100.0% | 0 |
| May 2026 | 23 | 23 | 73.9% | 0 |
| June 2026 | 26 | 25 | 76.0% | 1 |
| July 2026 | 27 | 23 | 60.9% | 4 |