YX4504
YX4504 (Republic Airways) is a multi-stop service on 27 routes, busiest New York to Philadelphia. Of 475 departures recorded from October 2024 to July 2026, 84.0% left on time, according to the US BTS.
- On-time departures84.0%of 475 flights
- Average delay13.2 min
- July 20263▼ 90.3%vs July 2025
- Cancelled3.0%
- Legs flown under this number27
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 | 9 | 0.0% |
| February | 4 | 10 | ▲ 150.0% |
| March | 1 | 51 | ▲ 5,000.0% |
| April | 27 | 36 | ▲ 33.3% |
| May | 21 | 24 | ▲ 14.3% |
| June | 29 | 38 | ▲ 31.0% |
| July | 31 | 3 | ▼ 90.3% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 8 | – | – |
| December | 14 | – | – |
| Year to date (Jan–Jul) | 122 | 171 | ▲ 40.2% |
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 | 88.9% | 100.0% | ▲ 12.5% |
| February | 100.0% | 100.0% | 0.0% |
| March | 100.0% | 70.0% | ▼ 30.0% |
| April | 96.3% | 80.0% | ▼ 16.9% |
| May | 95.2% | 83.3% | ▼ 12.5% |
| June | 82.8% | 91.9% | ▲ 11.0% |
| July | 71.4% | 100.0% | ▲ 40.0% |
| August | 69.0% | – | – |
| September | 72.4% | – | – |
| October | 83.3% | – | in progress |
| November | 100.0% | – | – |
| December | 64.3% | – | – |
| Year-to-date average (Jan–Jul) | 90.7% | 89.3% | ▼ 1.5% |
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 | 1 | – |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 1 | – |
| April | 0 | 1 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 3 | 0 | ▼ 100.0% |
| August | 2 | – | – |
| September | 1 | – | – |
| October | 1 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 4 | 0.0% |
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 97.1% 461
- Cancelled 2.9% 14
Share of all recorded flights in the period, all legs. · Oct 14, 2024 → Jul 2, 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 |
|---|---|---|---|---|
| LGA PHL LaGuardia Airport – Philadelphia International Airport | 154 | -3.0 min | 97.1% | 105 |
| RDU BNA Raleigh-Durham International Airport – Nashville International Airport | 710 | 10.1 min | 84.1% | 44 |
| DCA LGA Ronald Reagan Washington National Airport – LaGuardia Airport | 345 | 19.3 min | 71.9% | 33 |
| PHL CLE Philadelphia International Airport – Cleveland Hopkins International Airport | 583 | 28.2 min | 65.5% | 32 |
| PIT ORD Pittsburgh International Airport – Chicago O'Hare International Airport | 662 | 24.7 min | 71.4% | 30 |
| ORD PIT Chicago O'Hare International Airport – Pittsburgh International Airport | 662 | 43.0 min | 66.7% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 14 | 14 | 100.0% | 0 |
| November 2024 | 26 | 26 | 100.0% | 0 |
| December 2024 | 28 | 27 | 92.6% | 1 |
| January 2025 | 9 | 9 | 88.9% | 0 |
| February 2025 | 4 | 3 | 100.0% | 1 |
| March 2025 | 1 | 1 | 100.0% | 0 |
| April 2025 | 27 | 27 | 96.3% | 0 |
| May 2025 | 21 | 21 | 95.2% | 0 |
| June 2025 | 29 | 29 | 82.8% | 0 |
| July 2025 | 31 | 28 | 71.4% | 3 |
| August 2025 | 31 | 29 | 69.0% | 2 |
| September 2025 | 30 | 29 | 72.4% | 1 |
| October 2025 | 31 | 30 | 83.3% | 1 |
| November 2025 | 8 | 7 | 100.0% | 1 |
| December 2025 | 14 | 14 | 64.3% | 0 |
| January 2026 | 9 | 8 | 100.0% | 1 |
| February 2026 | 10 | 10 | 100.0% | 0 |
| March 2026 | 51 | 50 | 70.0% | 1 |
| April 2026 | 36 | 35 | 80.0% | 1 |
| May 2026 | 24 | 24 | 83.3% | 0 |
| June 2026 | 38 | 37 | 91.9% | 1 |
| July 2026 | 3 | 3 | 100.0% | 0 |