YX4538
YX4538 (Republic Airways) is a multi-stop service on 2 routes, busiest New York to Washington. Of 631 departures recorded from October 2024 to July 2026, 89.9% left on time, according to the US BTS.
- On-time departures89.9%of 631 flights
- Average delay2.4 min
- July 202629▼ 6.5%vs July 2025
- Cancelled3.2%
- Legs flown under this number2
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 | 31 | 31 | 0.0% |
| February | 28 | 28 | 0.0% |
| March | 31 | 31 | 0.0% |
| April | 30 | 27 | ▼ 10.0% |
| May | 31 | 17 | ▼ 45.2% |
| June | 30 | 30 | 0.0% |
| July | 31 | 29 | ▼ 6.5% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 25 | – | – |
| Year to date (Jan–Jul) | 212 | 193 | ▼ 9.0% |
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 | 92.9% | 100.0% | ▲ 7.7% |
| February | 80.0% | 96.2% | ▲ 20.2% |
| March | 96.8% | 80.7% | ▼ 16.7% |
| April | 93.3% | 66.7% | ▼ 28.6% |
| May | 90.0% | 70.6% | ▼ 21.6% |
| June | 86.2% | 96.6% | ▲ 12.0% |
| July | 93.3% | 88.9% | ▼ 4.8% |
| August | 100.0% | – | – |
| September | 96.7% | – | – |
| October | 96.7% | – | in progress |
| November | 86.2% | – | – |
| December | 83.3% | – | – |
| Year-to-date average (Jan–Jul) | 90.4% | 85.6% | ▼ 5.2% |
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 | 3 | 3 | 0.0% |
| February | 3 | 2 | ▼ 33.3% |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 1 | 1 | 0.0% |
| July | 1 | 2 | ▲ 100.0% |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 9 | 8 | ▼ 11.1% |
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 96.8% 611
- Cancelled 3.2% 20
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| JFK DCA John F. Kennedy International Airport – Ronald Reagan Washington National Airport | 342 | 1.8 min | 90.9% | 603 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 30 | 30 | 90.0% | 0 |
| December 2024 | 30 | 30 | 83.3% | 0 |
| January 2025 | 31 | 28 | 92.9% | 3 |
| February 2025 | 28 | 25 | 80.0% | 3 |
| March 2025 | 31 | 31 | 96.8% | 0 |
| April 2025 | 30 | 30 | 93.3% | 0 |
| May 2025 | 31 | 30 | 90.0% | 1 |
| June 2025 | 30 | 29 | 86.2% | 1 |
| July 2025 | 31 | 30 | 93.3% | 1 |
| August 2025 | 31 | 30 | 100.0% | 1 |
| September 2025 | 30 | 30 | 96.7% | 0 |
| October 2025 | 31 | 30 | 96.7% | 1 |
| November 2025 | 29 | 29 | 86.2% | 0 |
| December 2025 | 25 | 24 | 83.3% | 1 |
| January 2026 | 31 | 28 | 100.0% | 3 |
| February 2026 | 28 | 26 | 96.2% | 2 |
| March 2026 | 31 | 31 | 80.7% | 0 |
| April 2026 | 27 | 27 | 66.7% | 0 |
| May 2026 | 17 | 17 | 70.6% | 0 |
| June 2026 | 30 | 29 | 96.6% | 1 |
| July 2026 | 29 | 27 | 88.9% | 2 |