YX4551
YX4551 (Republic Airways) is a multi-stop service on 15 routes, busiest Washington to New York. Of 558 departures recorded from October 2024 to July 2026, 92.4% left on time, according to the US BTS.
- On-time departures92.4%of 558 flights
- Average delay1.5 min
- July 202628▼ 9.7%vs July 2025
- Cancelled3.9%
- Legs flown under this number15
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 | 9 | 31 | ▲ 244.4% |
| February | 6 | 28 | ▲ 366.7% |
| March | 27 | 31 | ▲ 14.8% |
| April | 30 | 29 | ▼ 3.3% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 31 | 28 | ▼ 9.7% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 21 | – | – |
| December | 20 | – | – |
| Year to date (Jan–Jul) | 164 | 208 | ▲ 26.8% |
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% | 75.9% | ▼ 24.1% |
| February | 83.3% | 88.5% | ▲ 6.2% |
| March | 88.0% | 80.8% | ▼ 8.2% |
| April | 93.1% | 92.6% | ▼ 0.5% |
| May | 93.6% | 100.0% | ▲ 6.9% |
| June | 93.3% | 89.7% | ▼ 3.9% |
| July | 96.6% | 88.0% | ▼ 8.9% |
| August | 96.8% | – | – |
| September | 100.0% | – | – |
| October | 93.6% | – | in progress |
| November | 95.2% | – | – |
| December | 88.9% | – | – |
| Year-to-date average (Jan–Jul) | 92.6% | 87.9% | ▼ 5.0% |
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 | 0 | 2 | – |
| March | 2 | 5 | ▲ 150.0% |
| April | 1 | 2 | ▲ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 2 | 3 | ▲ 50.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 5 | 15 | ▲ 200.0% |
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 96.1% 536
- Cancelled 3.9% 22
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
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DCA JFK Ronald Reagan Washington National Airport – John F. Kennedy International Airport | 342 | -0.6 min | 94.7% | 348 |
| ORD LGA Chicago O'Hare International Airport – LaGuardia Airport | 1,177 | 15.7 min | 77.8% | 93 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 9 | 9 | 88.9% | 0 |
| December 2024 | 24 | 24 | 100.0% | 0 |
| January 2025 | 9 | 9 | 100.0% | 0 |
| February 2025 | 6 | 6 | 83.3% | 0 |
| March 2025 | 27 | 25 | 88.0% | 2 |
| April 2025 | 30 | 29 | 93.1% | 1 |
| May 2025 | 31 | 31 | 93.6% | 0 |
| June 2025 | 30 | 30 | 93.3% | 0 |
| July 2025 | 31 | 29 | 96.6% | 2 |
| August 2025 | 31 | 31 | 96.8% | 0 |
| September 2025 | 30 | 30 | 100.0% | 0 |
| October 2025 | 31 | 31 | 93.6% | 0 |
| November 2025 | 21 | 21 | 95.2% | 0 |
| December 2025 | 20 | 18 | 88.9% | 2 |
| January 2026 | 31 | 29 | 75.9% | 2 |
| February 2026 | 28 | 26 | 88.5% | 2 |
| March 2026 | 31 | 26 | 80.8% | 5 |
| April 2026 | 29 | 27 | 92.6% | 2 |
| May 2026 | 31 | 31 | 100.0% | 0 |
| June 2026 | 30 | 29 | 89.7% | 1 |
| July 2026 | 28 | 25 | 88.0% | 3 |