YX4380
YX4380 (Republic Airways) is a multi-stop service on 25 routes, busiest Boston to Washington. Of 784 departures recorded from October 2024 to July 2026, 80.3% left on time, according to the US BTS.
- On-time departures80.3%of 784 flights
- Average delay10.6 min
- July 202660▲ 93.5%vs July 2025
- Cancelled3.3%
- Legs flown under this number25
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 26 | 51 | ▲ 96.2% |
| February | 26 | 36 | ▲ 38.5% |
| March | 30 | 39 | ▲ 30.0% |
| April | 57 | 31 | ▼ 45.6% |
| May | 61 | 42 | ▼ 31.1% |
| June | 34 | 60 | ▲ 76.5% |
| July | 31 | 60 | ▲ 93.5% |
| August | 31 | – | – |
| September | 3 | – | – |
| October | 26 | – | in progress |
| November | 29 | – | – |
| December | 34 | – | – |
| Year to date (Jan–Jul) | 265 | 319 | ▲ 20.4% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 96.0% | 87.2% | ▼ 9.1% |
| February | 75.0% | 87.5% | ▲ 16.7% |
| March | 96.6% | 81.1% | ▼ 16.0% |
| April | 93.0% | 77.4% | ▼ 16.7% |
| May | 70.5% | 73.8% | ▲ 4.7% |
| June | 64.7% | 79.7% | ▲ 23.1% |
| July | 71.0% | 61.5% | ▼ 13.3% |
| August | 86.7% | – | – |
| September | 66.7% | – | – |
| October | 76.0% | – | in progress |
| November | 96.6% | – | – |
| December | 78.8% | – | – |
| Year-to-date average (Jan–Jul) | 81.0% | 78.3% | ▼ 3.3% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 4 | ▲ 300.0% |
| February | 2 | 4 | ▲ 100.0% |
| March | 1 | 2 | ▲ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 8 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 4 | 19 | ▲ 375.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 96.7% 758
- Cancelled 3.3% 26
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
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BOS DCA Boston Logan International Airport – Ronald Reagan Washington National Airport | 641 | 13.7 min | 77.2% | 108 |
| TUL ORD Tulsa International Airport – Chicago O'Hare International Airport | 941 | 10.4 min | 75.6% | 78 |
| DCA BOS Ronald Reagan Washington National Airport – Boston Logan International Airport | 641 | 15.2 min | 74.6% | 71 |
| LGA CMH LaGuardia Airport – John Glenn Columbus International Airport | 768 | 0.9 min | 91.4% | 64 |
| ORD TUL Chicago O'Hare International Airport – Tulsa International Airport | 941 | 8.7 min | 83.9% | 62 |
| CMH LGA John Glenn Columbus International Airport – LaGuardia Airport | 768 | 8.9 min | 82.4% | 55 |
| CVG LGA Cincinnati Northern Kentucky International Airport – LaGuardia Airport | 940 | 26.9 min | 71.7% | 53 |
| BOS JFK Boston Logan International Airport – John F. Kennedy International Airport | 300 | 4.8 min | 77.3% | 44 |
| LGA DCA LaGuardia Airport – Ronald Reagan Washington National Airport | 345 | -4.6 min | 100.0% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 9 | 9 | 100.0% | 0 |
| November 2024 | 48 | 48 | 79.2% | 0 |
| December 2024 | 20 | 20 | 90.0% | 0 |
| January 2025 | 26 | 25 | 96.0% | 1 |
| February 2025 | 26 | 24 | 75.0% | 2 |
| March 2025 | 30 | 29 | 96.6% | 1 |
| April 2025 | 57 | 57 | 93.0% | 0 |
| May 2025 | 61 | 61 | 70.5% | 0 |
| June 2025 | 34 | 34 | 64.7% | 0 |
| July 2025 | 31 | 31 | 71.0% | 0 |
| August 2025 | 31 | 30 | 86.7% | 1 |
| September 2025 | 3 | 3 | 66.7% | 0 |
| October 2025 | 26 | 25 | 76.0% | 1 |
| November 2025 | 29 | 29 | 96.6% | 0 |
| December 2025 | 34 | 33 | 78.8% | 1 |
| January 2026 | 51 | 47 | 87.2% | 4 |
| February 2026 | 36 | 32 | 87.5% | 4 |
| March 2026 | 39 | 37 | 81.1% | 2 |
| April 2026 | 31 | 31 | 77.4% | 0 |
| May 2026 | 42 | 42 | 73.8% | 0 |
| June 2026 | 60 | 59 | 79.7% | 1 |
| July 2026 | 60 | 52 | 61.5% | 8 |