YX4544
YX4544 (Republic Airways) is a multi-stop service on 25 routes, busiest Washington to Charleston. Of 569 departures recorded from October 2024 to July 2026, 85.2% left on time, according to the US BTS.
- On-time departures85.2%of 569 flights
- Average delay9.1 min
- July 20269▼ 71.0%vs July 2025
- Cancelled2.6%
- Legs flown under this number25
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 | 22 | 5 | ▼ 77.3% |
| February | 13 | 6 | ▼ 53.8% |
| March | 2 | 8 | ▲ 300.0% |
| April | 27 | 23 | ▼ 14.8% |
| May | 31 | 19 | ▼ 38.7% |
| June | 29 | 18 | ▼ 37.9% |
| July | 31 | 9 | ▼ 71.0% |
| August | 57 | – | – |
| September | 56 | – | – |
| October | 35 | – | in progress |
| November | 53 | – | – |
| December | 13 | – | – |
| Year to date (Jan–Jul) | 155 | 88 | ▼ 43.2% |
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 | 100.0% | 80.0% | ▼ 20.0% |
| February | 100.0% | 83.3% | ▼ 16.7% |
| March | 100.0% | 25.0% | ▼ 75.0% |
| April | 81.5% | 91.3% | ▲ 12.1% |
| May | 87.1% | 84.2% | ▼ 3.3% |
| June | 85.7% | 83.3% | ▼ 2.8% |
| July | 74.1% | 77.8% | ▲ 5.0% |
| August | 85.5% | – | – |
| September | 96.4% | – | – |
| October | 82.9% | – | in progress |
| November | 83.7% | – | – |
| December | 45.5% | – | – |
| Year-to-date average (Jan–Jul) | 89.8% | 75.0% | ▼ 16.5% |
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 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 4 | 0 | ▼ 100.0% |
| August | 2 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 4 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 7 | 0 | ▼ 100.0% |
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 97.4% 554
- Cancelled 2.6% 15
Share of all recorded flights in the period, all legs. · Oct 14, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DCA CHS Ronald Reagan Washington National Airport – Charleston International Airport | 715 | 10.0 min | 84.4% | 96 |
| BDL ORD Bradley International Airport – Chicago O'Hare International Airport | 1,257 | 5.3 min | 79.6% | 55 |
| ORD GRR Chicago O'Hare International Airport – Gerald R. Ford International Airport | 220 | 14.9 min | 84.8% | 48 |
| GRR ORD Gerald R. Ford International Airport – Chicago O'Hare International Airport | 220 | 27.5 min | 84.8% | 48 |
| BOS DCA Boston Logan International Airport – Ronald Reagan Washington National Airport | 641 | 0.5 min | 91.2% | 35 |
| LGA ATL LaGuardia Airport – Hartsfield Jackson Atlanta International Airport | 1,225 | -2.8 min | 97.0% | 33 |
| PHL SYR Philadelphia International Airport – Syracuse Hancock International Airport | 367 | 18.3 min | 67.9% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 32 | 32 | 90.6% | 0 |
| November 2024 | 42 | 42 | 90.5% | 0 |
| December 2024 | 38 | 38 | 81.6% | 0 |
| January 2025 | 22 | 20 | 100.0% | 2 |
| February 2025 | 13 | 13 | 100.0% | 0 |
| March 2025 | 2 | 2 | 100.0% | 0 |
| April 2025 | 27 | 27 | 81.5% | 0 |
| May 2025 | 31 | 31 | 87.1% | 0 |
| June 2025 | 29 | 28 | 85.7% | 1 |
| July 2025 | 31 | 27 | 74.1% | 4 |
| August 2025 | 57 | 55 | 85.5% | 2 |
| September 2025 | 56 | 56 | 96.4% | 0 |
| October 2025 | 35 | 35 | 82.9% | 0 |
| November 2025 | 53 | 49 | 83.7% | 4 |
| December 2025 | 13 | 11 | 45.5% | 2 |
| January 2026 | 5 | 5 | 80.0% | 0 |
| February 2026 | 6 | 6 | 83.3% | 0 |
| March 2026 | 8 | 8 | 25.0% | 0 |
| April 2026 | 23 | 23 | 91.3% | 0 |
| May 2026 | 19 | 19 | 84.2% | 0 |
| June 2026 | 18 | 18 | 83.3% | 0 |
| July 2026 | 9 | 9 | 77.8% | 0 |