YX4579
YX4579 (Republic Airways) is a multi-stop service on 5 routes, busiest New York to Pittsburgh. Of 690 departures recorded from October 2024 to July 2026, 83.5% left on time, according to the US BTS.
- On-time departures83.5%of 690 flights
- Average delay8.1 min
- July 202629▼ 6.5%vs July 2025
- Cancelled1.6%
- Legs flown under this number5
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 | 28 | 31 | ▲ 10.7% |
| February | 28 | 25 | ▼ 10.7% |
| March | 31 | 27 | ▼ 12.9% |
| April | 22 | 53 | ▲ 140.9% |
| May | 29 | 51 | ▲ 75.9% |
| June | 30 | 30 | 0.0% |
| July | 31 | 29 | ▼ 6.5% |
| August | 31 | – | – |
| September | 54 | – | – |
| October | 35 | – | in progress |
| November | 28 | – | – |
| December | 30 | – | – |
| Year to date (Jan–Jul) | 199 | 246 | ▲ 23.6% |
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 | 89.3% | 96.4% | ▲ 8.0% |
| February | 85.2% | 73.9% | ▼ 13.2% |
| March | 93.6% | 80.0% | ▼ 14.5% |
| April | 77.3% | 75.5% | ▼ 2.3% |
| May | 79.3% | 82.4% | ▲ 3.8% |
| June | 66.7% | 83.3% | ▲ 25.0% |
| July | 87.1% | 80.8% | ▼ 7.3% |
| August | 96.8% | – | – |
| September | 87.0% | – | – |
| October | 85.7% | – | in progress |
| November | 92.9% | – | – |
| December | 56.7% | – | – |
| Year-to-date average (Jan–Jul) | 82.6% | 81.8% | ▼ 1.1% |
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 | 3 | – |
| February | 1 | 2 | ▲ 100.0% |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 3 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 10 | ▲ 900.0% |
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 98.4% 679
- Cancelled 1.6% 11
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
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| LGA PIT LaGuardia Airport – Pittsburgh International Airport | 538 | 6.2 min | 84.7% | 560 |
| LGA ATL LaGuardia Airport – Hartsfield Jackson Atlanta International Airport | 1,225 | 10.6 min | 84.1% | 44 |
| ATL LGA Hartsfield Jackson Atlanta International Airport – LaGuardia Airport | 1,225 | 18.1 min | 75.0% | 44 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 25 | 25 | 92.0% | 0 |
| December 2024 | 22 | 22 | 86.4% | 0 |
| January 2025 | 28 | 28 | 89.3% | 0 |
| February 2025 | 28 | 27 | 85.2% | 1 |
| March 2025 | 31 | 31 | 93.6% | 0 |
| April 2025 | 22 | 22 | 77.3% | 0 |
| May 2025 | 29 | 29 | 79.3% | 0 |
| June 2025 | 30 | 30 | 66.7% | 0 |
| July 2025 | 31 | 31 | 87.1% | 0 |
| August 2025 | 31 | 31 | 96.8% | 0 |
| September 2025 | 54 | 54 | 87.0% | 0 |
| October 2025 | 35 | 35 | 85.7% | 0 |
| November 2025 | 28 | 28 | 92.9% | 0 |
| December 2025 | 30 | 30 | 56.7% | 0 |
| January 2026 | 31 | 28 | 96.4% | 3 |
| February 2026 | 25 | 23 | 73.9% | 2 |
| March 2026 | 27 | 25 | 80.0% | 2 |
| April 2026 | 53 | 53 | 75.5% | 0 |
| May 2026 | 51 | 51 | 82.4% | 0 |
| June 2026 | 30 | 30 | 83.3% | 0 |
| July 2026 | 29 | 26 | 80.8% | 3 |