YX4519
YX4519 (Republic Airways) is a multi-stop service on 17 routes, busiest Washington to Indianapolis. Of 490 departures recorded from October 2024 to July 2026, 80.9% left on time, according to the US BTS.
- On-time departures80.9%of 490 flights
- Average delay11.3 min
- July 202627▼ 10.0%vs July 2025
- Cancelled3.7%
- Legs flown under this number17
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 | 53 | 22 | ▼ 58.5% |
| February | 38 | 24 | ▼ 36.8% |
| March | 28 | 27 | ▼ 3.6% |
| April | 27 | 5 | ▼ 81.5% |
| May | 6 | 10 | ▲ 66.7% |
| June | 26 | 30 | ▲ 15.4% |
| July | 30 | 27 | ▼ 10.0% |
| August | 5 | – | – |
| September | 27 | – | – |
| October | 5 | – | in progress |
| November | 24 | – | – |
| December | 18 | – | – |
| Year to date (Jan–Jul) | 208 | 145 | ▼ 30.3% |
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 | 88.2% | 80.0% | ▼ 9.3% |
| February | 78.4% | 76.2% | ▼ 2.8% |
| March | 77.8% | 61.5% | ▼ 20.9% |
| April | 81.5% | 20.0% | ▼ 75.5% |
| May | 83.3% | 100.0% | ▲ 20.0% |
| June | 69.2% | 92.9% | ▲ 34.1% |
| July | 78.6% | 85.2% | ▲ 8.4% |
| August | 75.0% | – | – |
| September | 92.6% | – | – |
| October | 100.0% | – | in progress |
| November | 77.3% | – | – |
| December | 55.6% | – | – |
| Year-to-date average (Jan–Jul) | 79.6% | 73.7% | ▼ 7.4% |
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 | 2 | 2 | 0.0% |
| February | 1 | 3 | ▲ 200.0% |
| March | 1 | 1 | 0.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 2 | – |
| July | 2 | 0 | ▼ 100.0% |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 6 | 8 | ▲ 33.3% |
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 96.3% 472
- Cancelled 3.7% 18
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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DCA IND Ronald Reagan Washington National Airport – Indianapolis International Airport | 802 | 18.8 min | 70.0% | 131 |
| DSM ORD Des Moines International Airport – Chicago O'Hare International Airport | 480 | 14.9 min | 82.9% | 128 |
| TUL ORD Tulsa International Airport – Chicago O'Hare International Airport | 941 | 17.2 min | 79.3% | 54 |
| ORD TUL Chicago O'Hare International Airport – Tulsa International Airport | 941 | 4.2 min | 88.9% | 36 |
| CAE LGA Columbia Metropolitan Airport – LaGuardia Airport | 994 | -2.3 min | 93.8% | 32 |
| ORD ORF Chicago O'Hare International Airport – Norfolk International Airport | 1,152 | 6.1 min | 83.9% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 85.0% | 0 |
| November 2024 | 9 | 9 | 100.0% | 0 |
| December 2024 | 29 | 28 | 92.9% | 1 |
| January 2025 | 53 | 51 | 88.2% | 2 |
| February 2025 | 38 | 37 | 78.4% | 1 |
| March 2025 | 28 | 27 | 77.8% | 1 |
| April 2025 | 27 | 27 | 81.5% | 0 |
| May 2025 | 6 | 6 | 83.3% | 0 |
| June 2025 | 26 | 26 | 69.2% | 0 |
| July 2025 | 30 | 28 | 78.6% | 2 |
| August 2025 | 5 | 4 | 75.0% | 1 |
| September 2025 | 27 | 27 | 92.6% | 0 |
| October 2025 | 5 | 5 | 100.0% | 0 |
| November 2025 | 24 | 22 | 77.3% | 2 |
| December 2025 | 18 | 18 | 55.6% | 0 |
| January 2026 | 22 | 20 | 80.0% | 2 |
| February 2026 | 24 | 21 | 76.2% | 3 |
| March 2026 | 27 | 26 | 61.5% | 1 |
| April 2026 | 5 | 5 | 20.0% | 0 |
| May 2026 | 10 | 10 | 100.0% | 0 |
| June 2026 | 30 | 28 | 92.9% | 2 |
| July 2026 | 27 | 27 | 85.2% | 0 |