YX4401
YX4401 (Republic Airways) is a multi-stop service on 25 routes, busiest Boston to New York. Of 608 departures recorded from October 2024 to July 2026, 86.5% left on time, according to the US BTS.
- On-time departures86.5%of 608 flights
- Average delay7.2 min
- July 202631▲ 0.0%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 | 14 | 36 | ▲ 157.1% |
| February | 20 | 28 | ▲ 40.0% |
| March | 29 | 55 | ▲ 89.7% |
| April | 26 | 34 | ▲ 30.8% |
| May | 30 | 28 | ▼ 6.7% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 6 | – | – |
| September | 28 | – | – |
| October | 31 | – | in progress |
| November | 6 | – | – |
| December | 40 | – | – |
| Year to date (Jan–Jul) | 180 | 242 | ▲ 34.4% |
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% | 83.9% | ▼ 16.1% |
| February | 84.2% | 68.0% | ▼ 19.2% |
| March | 86.2% | 79.3% | ▼ 8.1% |
| April | 96.2% | 76.5% | ▼ 20.5% |
| May | 75.9% | 96.4% | ▲ 27.1% |
| June | 93.1% | 96.6% | ▲ 3.7% |
| July | 96.7% | 90.3% | ▼ 6.6% |
| August | 100.0% | – | – |
| September | 96.4% | – | – |
| October | 96.8% | – | in progress |
| November | 66.7% | – | – |
| December | 64.1% | – | – |
| Year-to-date average (Jan–Jul) | 90.3% | 84.4% | ▼ 6.5% |
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 | 0 | 5 | – |
| February | 1 | 3 | ▲ 200.0% |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 1 | 1 | 0.0% |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 4 | 11 | ▲ 175.0% |
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% 592
- Cancelled 2.6% 16
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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BOS JFK Boston Logan International Airport – John F. Kennedy International Airport | 300 | -2.1 min | 94.8% | 194 |
| PIT LGA Pittsburgh International Airport – LaGuardia Airport | 538 | -4.3 min | 93.8% | 64 |
| DCA RDU Ronald Reagan Washington National Airport – Raleigh-Durham International Airport | 365 | 8.7 min | 85.5% | 56 |
| PHL IND Philadelphia International Airport – Indianapolis International Airport | 944 | 14.3 min | 73.3% | 31 |
| PIT JFK Pittsburgh International Airport – John F. Kennedy International Airport | 545 | 33.6 min | 72.4% | 30 |
| JFK PIT John F. Kennedy International Airport – Pittsburgh International Airport | 545 | 9.6 min | 89.7% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 26 | 26 | 92.3% | 0 |
| December 2024 | 29 | 29 | 86.2% | 0 |
| January 2025 | 14 | 14 | 100.0% | 0 |
| February 2025 | 20 | 19 | 84.2% | 1 |
| March 2025 | 29 | 29 | 86.2% | 0 |
| April 2025 | 26 | 26 | 96.2% | 0 |
| May 2025 | 30 | 29 | 75.9% | 1 |
| June 2025 | 30 | 29 | 93.1% | 1 |
| July 2025 | 31 | 30 | 96.7% | 1 |
| August 2025 | 6 | 6 | 100.0% | 0 |
| September 2025 | 28 | 28 | 96.4% | 0 |
| October 2025 | 31 | 31 | 96.8% | 0 |
| November 2025 | 6 | 6 | 66.7% | 0 |
| December 2025 | 40 | 39 | 64.1% | 1 |
| January 2026 | 36 | 31 | 83.9% | 5 |
| February 2026 | 28 | 25 | 68.0% | 3 |
| March 2026 | 55 | 53 | 79.3% | 2 |
| April 2026 | 34 | 34 | 76.5% | 0 |
| May 2026 | 28 | 28 | 96.4% | 0 |
| June 2026 | 30 | 29 | 96.6% | 1 |
| July 2026 | 31 | 31 | 90.3% | 0 |