YX4501
YX4501 (Republic Airways) is a multi-stop service on 7 routes, busiest Washington to Indianapolis. Of 691 departures recorded from October 2024 to July 2026, 76.8% left on time, according to the US BTS.
- On-time departures76.8%of 691 flights
- Average delay12.4 min
- July 202646▲ 76.9%vs July 2025
- Cancelled3.8%
- Legs flown under this number7
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 | 53 | ▲ 89.3% |
| February | 24 | 38 | ▲ 58.3% |
| March | 30 | 28 | ▼ 6.7% |
| April | 30 | 29 | ▼ 3.3% |
| May | 31 | 36 | ▲ 16.1% |
| June | 26 | 42 | ▲ 61.5% |
| July | 26 | 46 | ▲ 76.9% |
| August | 30 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 195 | 272 | ▲ 39.5% |
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% | 77.1% | ▼ 22.9% |
| February | 95.8% | 72.2% | ▼ 24.6% |
| March | 100.0% | 66.7% | ▼ 33.3% |
| April | 73.3% | 85.7% | ▲ 16.9% |
| May | 63.3% | 94.4% | ▲ 49.1% |
| June | 45.8% | 78.1% | ▲ 70.3% |
| July | 52.4% | 75.6% | ▲ 44.3% |
| August | 72.4% | – | – |
| September | 66.7% | – | – |
| October | 74.2% | – | in progress |
| November | 69.0% | – | – |
| December | 58.6% | – | – |
| Year-to-date average (Jan–Jul) | 75.8% | 78.5% | ▲ 3.6% |
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 | 5 | ▲ 150.0% |
| February | 0 | 2 | – |
| March | 1 | 4 | ▲ 300.0% |
| April | 0 | 1 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 2 | 1 | ▼ 50.0% |
| July | 5 | 1 | ▼ 80.0% |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 11 | 14 | ▲ 27.3% |
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 96.2% 665
- Cancelled 3.8% 26
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 | 67.6% | 359 |
| PIT DCA Pittsburgh International Airport – Ronald Reagan Washington National Airport | 329 | -4.7 min | 96.8% | 126 |
| RIC LGA Richmond International Airport – LaGuardia Airport | 470 | 29.2 min | 72.6% | 52 |
| LGA RIC LaGuardia Airport – Richmond International Airport | 470 | 2.0 min | 86.3% | 52 |
| LGA RDU LaGuardia Airport – Raleigh-Durham International Airport | 693 | 2.3 min | 88.6% | 44 |
| IND DCA Indianapolis International Airport – Ronald Reagan Washington National Airport | 802 | 13.6 min | 75.0% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 94.1% | 0 |
| November 2024 | 28 | 28 | 85.7% | 0 |
| December 2024 | 30 | 30 | 86.7% | 0 |
| January 2025 | 28 | 26 | 100.0% | 2 |
| February 2025 | 24 | 24 | 95.8% | 0 |
| March 2025 | 30 | 29 | 100.0% | 1 |
| April 2025 | 30 | 30 | 73.3% | 0 |
| May 2025 | 31 | 30 | 63.3% | 1 |
| June 2025 | 26 | 24 | 45.8% | 2 |
| July 2025 | 26 | 21 | 52.4% | 5 |
| August 2025 | 30 | 29 | 72.4% | 1 |
| September 2025 | 30 | 30 | 66.7% | 0 |
| October 2025 | 31 | 31 | 74.2% | 0 |
| November 2025 | 29 | 29 | 69.0% | 0 |
| December 2025 | 29 | 29 | 58.6% | 0 |
| January 2026 | 53 | 48 | 77.1% | 5 |
| February 2026 | 38 | 36 | 72.2% | 2 |
| March 2026 | 28 | 24 | 66.7% | 4 |
| April 2026 | 29 | 28 | 85.7% | 1 |
| May 2026 | 36 | 36 | 94.4% | 0 |
| June 2026 | 42 | 41 | 78.1% | 1 |
| July 2026 | 46 | 45 | 75.6% | 1 |