YX4721
YX4721 (Republic Airways) is a multi-stop service on 10 routes, busiest Boston to New York. Of 544 departures recorded from October 2024 to July 2026, 81.0% left on time, according to the US BTS.
- On-time departures81.0%of 544 flights
- Average delay8.1 min
- July 202612▼ 61.3%vs July 2025
- Cancelled3.3%
- Legs flown under this number10
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 | 26 | 26 | 0.0% |
| February | 28 | 28 | 0.0% |
| March | 27 | 31 | ▲ 14.8% |
| April | 30 | 30 | 0.0% |
| May | 4 | 24 | ▲ 500.0% |
| June | 26 | 8 | ▼ 69.2% |
| July | 31 | 12 | ▼ 61.3% |
| August | 49 | – | – |
| September | 32 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 23 | – | – |
| Year to date (Jan–Jul) | 172 | 159 | ▼ 7.6% |
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 | 88.0% | 75.0% | ▼ 14.8% |
| February | 92.0% | 80.0% | ▼ 13.0% |
| March | 92.6% | 51.6% | ▼ 44.3% |
| April | 86.7% | 76.7% | ▼ 11.5% |
| May | 100.0% | 70.8% | ▼ 29.2% |
| June | 76.9% | 75.0% | ▼ 2.5% |
| July | 87.1% | 72.7% | ▼ 16.5% |
| August | 80.0% | – | – |
| September | 84.4% | – | – |
| October | 86.7% | – | in progress |
| November | 78.6% | – | – |
| December | 77.3% | – | – |
| Year-to-date average (Jan–Jul) | 89.0% | 71.7% | ▼ 19.5% |
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 | 1 | 2 | ▲ 100.0% |
| February | 3 | 3 | 0.0% |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 4 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 2 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 4 | 6 | ▲ 50.0% |
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 96.7% 526
- Cancelled 3.3% 18
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 25, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BOS JFK Boston Logan International Airport – John F. Kennedy International Airport | 300 | 7.3 min | 81.5% | 461 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 12 | 12 | 91.7% | 0 |
| December 2024 | 16 | 16 | 75.0% | 0 |
| January 2025 | 26 | 25 | 88.0% | 1 |
| February 2025 | 28 | 25 | 92.0% | 3 |
| March 2025 | 27 | 27 | 92.6% | 0 |
| April 2025 | 30 | 30 | 86.7% | 0 |
| May 2025 | 4 | 4 | 100.0% | 0 |
| June 2025 | 26 | 26 | 76.9% | 0 |
| July 2025 | 31 | 31 | 87.1% | 0 |
| August 2025 | 49 | 45 | 80.0% | 4 |
| September 2025 | 32 | 32 | 84.4% | 0 |
| October 2025 | 31 | 30 | 86.7% | 1 |
| November 2025 | 30 | 28 | 78.6% | 2 |
| December 2025 | 23 | 22 | 77.3% | 1 |
| January 2026 | 26 | 24 | 75.0% | 2 |
| February 2026 | 28 | 25 | 80.0% | 3 |
| March 2026 | 31 | 31 | 51.6% | 0 |
| April 2026 | 30 | 30 | 76.7% | 0 |
| May 2026 | 24 | 24 | 70.8% | 0 |
| June 2026 | 8 | 8 | 75.0% | 0 |
| July 2026 | 12 | 11 | 72.7% | 1 |