YX4520
YX4520 (Republic Airways) is a multi-stop service on 15 routes, busiest Washington to Indianapolis. Of 554 departures recorded from October 2024 to July 2026, 73.4% left on time, according to the US BTS.
- On-time departures73.4%of 554 flights
- Average delay18.2 min
- July 202627▼ 12.9%vs July 2025
- Cancelled7.2%
- Legs flown under this number15
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 | 30 | ▲ 233.3% |
| February | 17 | 41 | ▲ 141.2% |
| March | 28 | 13 | ▼ 53.6% |
| April | 26 | 21 | ▼ 19.2% |
| May | 26 | 26 | 0.0% |
| June | 30 | 26 | ▼ 13.3% |
| July | 31 | 27 | ▼ 12.9% |
| August | 27 | – | – |
| September | 26 | – | – |
| October | 27 | – | in progress |
| November | 2 | – | – |
| December | 25 | – | – |
| Year to date (Jan–Jul) | 167 | 184 | ▲ 10.2% |
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 | 71.4% | 88.9% | ▲ 24.4% |
| February | 76.5% | 73.0% | ▼ 4.6% |
| March | 80.8% | 76.9% | ▼ 4.8% |
| April | 68.0% | 85.7% | ▲ 26.0% |
| May | 60.0% | 60.9% | ▲ 1.4% |
| June | 50.0% | 58.3% | ▲ 16.7% |
| July | 61.9% | 45.8% | ▼ 26.0% |
| August | 61.5% | – | – |
| September | 80.8% | – | – |
| October | 80.8% | – | in progress |
| November | 100.0% | – | – |
| December | 70.8% | – | – |
| Year-to-date average (Jan–Jul) | 66.9% | 69.9% | ▲ 4.5% |
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 | 2 | 3 | ▲ 50.0% |
| February | 0 | 4 | – |
| March | 2 | 0 | ▼ 100.0% |
| April | 1 | 0 | ▼ 100.0% |
| May | 1 | 3 | ▲ 200.0% |
| June | 6 | 2 | ▼ 66.7% |
| July | 10 | 3 | ▼ 70.0% |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 22 | 15 | ▼ 31.8% |
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 92.8% 514
- Cancelled 7.2% 40
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DCA IND Ronald Reagan Washington National Airport – Indianapolis International Airport | 802 | 23.1 min | 68.7% | 353 |
| DCA IAH Ronald Reagan Washington National Airport – George Bush Intercontinental Airport | 1,942 | 6.9 min | 82.8% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 16 | 16 | 93.8% | 0 |
| November 2024 | 45 | 45 | 95.6% | 0 |
| December 2024 | 35 | 35 | 80.0% | 0 |
| January 2025 | 9 | 7 | 71.4% | 2 |
| February 2025 | 17 | 17 | 76.5% | 0 |
| March 2025 | 28 | 26 | 80.8% | 2 |
| April 2025 | 26 | 25 | 68.0% | 1 |
| May 2025 | 26 | 25 | 60.0% | 1 |
| June 2025 | 30 | 24 | 50.0% | 6 |
| July 2025 | 31 | 21 | 61.9% | 10 |
| August 2025 | 27 | 26 | 61.5% | 1 |
| September 2025 | 26 | 26 | 80.8% | 0 |
| October 2025 | 27 | 26 | 80.8% | 1 |
| November 2025 | 2 | 2 | 100.0% | 0 |
| December 2025 | 25 | 24 | 70.8% | 1 |
| January 2026 | 30 | 27 | 88.9% | 3 |
| February 2026 | 41 | 37 | 73.0% | 4 |
| March 2026 | 13 | 13 | 76.9% | 0 |
| April 2026 | 21 | 21 | 85.7% | 0 |
| May 2026 | 26 | 23 | 60.9% | 3 |
| June 2026 | 26 | 24 | 58.3% | 2 |
| July 2026 | 27 | 24 | 45.8% | 3 |