YX4450
YX4450 (Republic Airways) is a multi-stop service on 27 routes, busiest New York to Boston. Of 669 departures recorded from October 2024 to July 2026, 78.9% left on time, according to the US BTS.
- On-time departures78.9%of 669 flights
- Average delay11.9 min
- July 202610▼ 83.3%vs July 2025
- Cancelled3.1%
- Legs flown under this number27
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 | 30 | 28 | ▼ 6.7% |
| February | 22 | 28 | ▲ 27.3% |
| March | 20 | 49 | ▲ 145.0% |
| April | 27 | 58 | ▲ 114.8% |
| May | 12 | 51 | ▲ 325.0% |
| June | 50 | 30 | ▼ 40.0% |
| July | 60 | 10 | ▼ 83.3% |
| August | 36 | – | – |
| September | 2 | – | – |
| October | 26 | – | in progress |
| November | 29 | – | – |
| December | 22 | – | – |
| Year to date (Jan–Jul) | 221 | 254 | ▲ 14.9% |
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 | 93.3% | 73.1% | ▼ 21.7% |
| February | 85.7% | 76.0% | ▼ 11.3% |
| March | 90.0% | 86.4% | ▼ 4.0% |
| April | 96.3% | 84.5% | ▼ 12.3% |
| May | 66.7% | 80.4% | ▲ 20.6% |
| June | 54.6% | 93.3% | ▲ 71.1% |
| July | 79.0% | 60.0% | ▼ 24.0% |
| August | 55.6% | – | – |
| September | 50.0% | – | – |
| October | 65.4% | – | in progress |
| November | 72.4% | – | – |
| December | 71.4% | – | – |
| Year-to-date average (Jan–Jul) | 80.8% | 79.1% | ▼ 2.1% |
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 | 2 | – |
| February | 1 | 3 | ▲ 200.0% |
| March | 0 | 5 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 6 | 0 | ▼ 100.0% |
| July | 3 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 10 | 10 | 0.0% |
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 96.9% 648
- Cancelled 3.1% 21
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 25, 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 |
|---|---|---|---|---|
| LGA BOS LaGuardia Airport – Boston Logan International Airport | 296 | 7.2 min | 79.8% | 168 |
| HHH DCA Hilton Head Airport – Ronald Reagan Washington National Airport | 808 | 17.5 min | 77.3% | 44 |
| DCA HHH Ronald Reagan Washington National Airport – Hilton Head Airport | 808 | 0.2 min | 90.9% | 44 |
| JFK ORD John F. Kennedy International Airport – Chicago O'Hare International Airport | 1,188 | 7.8 min | 88.1% | 42 |
| PHL MEM Philadelphia International Airport – Frederick W. Smith International Airport | 1,405 | 1.2 min | 87.5% | 32 |
| MEM PHL Frederick W. Smith International Airport – Philadelphia International Airport | 1,405 | 9.7 min | 83.9% | 32 |
| CLE JFK Cleveland Hopkins International Airport – John F. Kennedy International Airport | 682 | 2.7 min | 93.6% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 25 | 25 | 92.0% | 0 |
| December 2024 | 34 | 34 | 85.3% | 0 |
| January 2025 | 30 | 30 | 93.3% | 0 |
| February 2025 | 22 | 21 | 85.7% | 1 |
| March 2025 | 20 | 20 | 90.0% | 0 |
| April 2025 | 27 | 27 | 96.3% | 0 |
| May 2025 | 12 | 12 | 66.7% | 0 |
| June 2025 | 50 | 44 | 54.6% | 6 |
| July 2025 | 60 | 57 | 79.0% | 3 |
| August 2025 | 36 | 36 | 55.6% | 0 |
| September 2025 | 2 | 2 | 50.0% | 0 |
| October 2025 | 26 | 26 | 65.4% | 0 |
| November 2025 | 29 | 29 | 72.4% | 0 |
| December 2025 | 22 | 21 | 71.4% | 1 |
| January 2026 | 28 | 26 | 73.1% | 2 |
| February 2026 | 28 | 25 | 76.0% | 3 |
| March 2026 | 49 | 44 | 86.4% | 5 |
| April 2026 | 58 | 58 | 84.5% | 0 |
| May 2026 | 51 | 51 | 80.4% | 0 |
| June 2026 | 30 | 30 | 93.3% | 0 |
| July 2026 | 10 | 10 | 60.0% | 0 |