YX4585
YX4585 (Republic Airways) is a multi-stop service on 3 routes, busiest Boston to Indianapolis. Of 513 departures recorded from November 2024 to July 2026, 69.3% left on time, according to the US BTS.
- On-time departures69.3%of 513 flights
- Average delay21.7 min
- July 202627▲ 0.0%vs July 2025
- Cancelled3.5%
- Legs flown under this number3
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 | 27 | 27 | 0.0% |
| February | 24 | 27 | ▲ 12.5% |
| March | 26 | 31 | ▲ 19.2% |
| April | 26 | 6 | ▼ 76.9% |
| May | 26 | 9 | ▼ 65.4% |
| June | 26 | 26 | 0.0% |
| July | 27 | 27 | 0.0% |
| August | 26 | – | – |
| September | 26 | – | – |
| October | 27 | – | in progress |
| November | 24 | – | – |
| December | 28 | – | – |
| Year to date (Jan–Jul) | 182 | 153 | ▼ 15.9% |
according to the US BTS · November 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 | 84.6% | 72.0% | ▼ 14.9% |
| February | 78.3% | 88.0% | ▲ 12.4% |
| March | 76.9% | 61.3% | ▼ 20.3% |
| April | 65.4% | 66.7% | ▲ 2.0% |
| May | 42.3% | 66.7% | ▲ 57.6% |
| June | 65.4% | 69.2% | ▲ 5.9% |
| July | 62.5% | 41.7% | ▼ 33.3% |
| August | 73.1% | – | – |
| September | 83.3% | – | – |
| October | 48.0% | – | in progress |
| November | 83.3% | – | – |
| December | 59.3% | – | – |
| Year-to-date average (Jan–Jul) | 67.9% | 66.5% | ▼ 2.1% |
according to the US BTS · November 2024 → July 2026
Average departure delay by month
according to the US BTS · November 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 2 | ▲ 100.0% |
| February | 1 | 2 | ▲ 100.0% |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 3 | 3 | 0.0% |
| August | 0 | – | – |
| September | 2 | – | – |
| October | 2 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 5 | 7 | ▲ 40.0% |
according to the US BTS · November 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 96.5% 495
- Cancelled 3.5% 18
Share of all recorded flights in the period, all legs. · Nov 6, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BOS IND Boston Logan International Airport – Indianapolis International Airport | 1,313 | 23.0 min | 68.0% | 479 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| November 2024 | 23 | 23 | 82.6% | 0 |
| December 2024 | 24 | 23 | 87.0% | 1 |
| January 2025 | 27 | 26 | 84.6% | 1 |
| February 2025 | 24 | 23 | 78.3% | 1 |
| March 2025 | 26 | 26 | 76.9% | 0 |
| April 2025 | 26 | 26 | 65.4% | 0 |
| May 2025 | 26 | 26 | 42.3% | 0 |
| June 2025 | 26 | 26 | 65.4% | 0 |
| July 2025 | 27 | 24 | 62.5% | 3 |
| August 2025 | 26 | 26 | 73.1% | 0 |
| September 2025 | 26 | 24 | 83.3% | 2 |
| October 2025 | 27 | 25 | 48.0% | 2 |
| November 2025 | 24 | 24 | 83.3% | 0 |
| December 2025 | 28 | 27 | 59.3% | 1 |
| January 2026 | 27 | 25 | 72.0% | 2 |
| February 2026 | 27 | 25 | 88.0% | 2 |
| March 2026 | 31 | 31 | 61.3% | 0 |
| April 2026 | 6 | 6 | 66.7% | 0 |
| May 2026 | 9 | 9 | 66.7% | 0 |
| June 2026 | 26 | 26 | 69.2% | 0 |
| July 2026 | 27 | 24 | 41.7% | 3 |