YX4383
YX4383 (Republic Airways) is a multi-stop service on 21 routes, busiest Boston to Washington. Of 573 departures recorded from October 2024 to July 2026, 72.1% left on time, according to the US BTS.
- On-time departures72.1%of 573 flights
- Average delay20.0 min
- July 20262▼ 92.3%vs July 2025
- Cancelled2.4%
- 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 | 31 | 27 | ▼ 12.9% |
| February | 28 | 24 | ▼ 14.3% |
| March | 31 | 27 | ▼ 12.9% |
| April | 30 | 26 | ▼ 13.3% |
| May | 31 | 39 | ▲ 25.8% |
| June | 26 | 56 | ▲ 115.4% |
| July | 26 | 2 | ▼ 92.3% |
| August | 18 | – | – |
| September | 25 | – | – |
| October | 27 | – | in progress |
| November | 26 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 203 | 201 | ▼ 1.0% |
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 | 80.7% | 79.2% | ▼ 1.8% |
| February | 50.0% | 77.3% | ▲ 54.5% |
| March | 70.0% | 46.2% | ▼ 34.1% |
| April | 60.0% | 92.3% | ▲ 53.9% |
| May | 33.3% | 76.9% | ▲ 130.8% |
| June | 76.0% | 81.8% | ▲ 7.7% |
| July | 57.7% | 50.0% | ▼ 13.3% |
| August | 83.3% | – | – |
| September | 100.0% | – | – |
| October | 57.7% | – | in progress |
| November | 69.2% | – | – |
| December | 75.0% | – | – |
| Year-to-date average (Jan–Jul) | 61.1% | 71.9% | ▲ 17.8% |
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 | 0 | 3 | – |
| February | 2 | 2 | 0.0% |
| March | 1 | 1 | 0.0% |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 1 | 1 | 0.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 5 | 7 | ▲ 40.0% |
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 97.6% 559
- Cancelled 2.4% 14
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 1, 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 |
|---|---|---|---|---|
| BOS DCA Boston Logan International Airport – Ronald Reagan Washington National Airport | 641 | 19.8 min | 63.2% | 175 |
| LGA STL LaGuardia Airport – St. Louis Lambert International Airport | 1,426 | 25.3 min | 69.1% | 143 |
| MEM ORD Frederick W. Smith International Airport – Chicago O'Hare International Airport | 792 | 36.0 min | 66.7% | 52 |
| PIT ORD Pittsburgh International Airport – Chicago O'Hare International Airport | 662 | 5.4 min | 89.5% | 38 |
| JAX DCA Jacksonville International Airport – Ronald Reagan Washington National Airport | 1,022 | 50.5 min | 65.5% | 30 |
| DCA JAX Ronald Reagan Washington National Airport – Jacksonville International Airport | 1,022 | 15.4 min | 76.7% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 9 | 9 | 100.0% | 0 |
| December 2024 | 15 | 15 | 86.7% | 0 |
| January 2025 | 31 | 31 | 80.7% | 0 |
| February 2025 | 28 | 26 | 50.0% | 2 |
| March 2025 | 31 | 30 | 70.0% | 1 |
| April 2025 | 30 | 30 | 60.0% | 0 |
| May 2025 | 31 | 30 | 33.3% | 1 |
| June 2025 | 26 | 25 | 76.0% | 1 |
| July 2025 | 26 | 26 | 57.7% | 0 |
| August 2025 | 18 | 18 | 83.3% | 0 |
| September 2025 | 25 | 25 | 100.0% | 0 |
| October 2025 | 27 | 26 | 57.7% | 1 |
| November 2025 | 26 | 26 | 69.2% | 0 |
| December 2025 | 29 | 28 | 75.0% | 1 |
| January 2026 | 27 | 24 | 79.2% | 3 |
| February 2026 | 24 | 22 | 77.3% | 2 |
| March 2026 | 27 | 26 | 46.2% | 1 |
| April 2026 | 26 | 26 | 92.3% | 0 |
| May 2026 | 39 | 39 | 76.9% | 0 |
| June 2026 | 56 | 55 | 81.8% | 1 |
| July 2026 | 2 | 2 | 50.0% | 0 |