YX4595
YX4595 (Republic Airways) is a multi-stop service on 22 routes, busiest Chicago to St Louis. Of 665 departures recorded from October 2024 to July 2026, 84.6% left on time, according to the US BTS.
- On-time departures84.6%of 665 flights
- Average delay9.4 min
- July 202627▲ 0.0%vs July 2025
- Cancelled2.3%
- Legs flown under this number22
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 | 13 | 35 | ▲ 169.2% |
| February | 34 | 25 | ▼ 26.5% |
| March | 56 | 27 | ▼ 51.8% |
| April | 14 | 44 | ▲ 214.3% |
| May | 6 | 39 | ▲ 550.0% |
| June | 13 | 26 | ▲ 100.0% |
| July | 27 | 27 | 0.0% |
| August | 30 | – | – |
| September | 46 | – | – |
| October | 33 | – | in progress |
| November | 46 | – | – |
| December | 45 | – | – |
| Year to date (Jan–Jul) | 163 | 223 | ▲ 36.8% |
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 | 92.3% | 94.3% | ▲ 2.1% |
| February | 97.1% | 88.0% | ▼ 9.3% |
| March | 92.9% | 75.0% | ▼ 19.2% |
| April | 76.9% | 97.7% | ▲ 27.0% |
| May | 66.7% | 87.2% | ▲ 30.8% |
| June | 92.3% | 100.0% | ▲ 8.3% |
| July | 66.7% | 87.5% | ▲ 31.2% |
| August | 80.0% | – | – |
| September | 93.5% | – | – |
| October | 72.7% | – | in progress |
| November | 79.6% | – | – |
| December | 44.2% | – | – |
| Year-to-date average (Jan–Jul) | 83.5% | 89.9% | ▲ 7.7% |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 3 | – |
| April | 1 | 1 | 0.0% |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 3 | 3 | 0.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 4 | 7 | ▲ 75.0% |
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 97.7% 650
- Cancelled 2.3% 15
Share of all recorded flights in the period, all legs. · Oct 31, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD STL Chicago O'Hare International Airport – St. Louis Lambert International Airport | 415 | 13.1 min | 79.4% | 133 |
| ATL LGA Hartsfield Jackson Atlanta International Airport – LaGuardia Airport | 1,225 | 2.0 min | 91.1% | 127 |
| STL ORD St. Louis Lambert International Airport – Chicago O'Hare International Airport | 415 | 13.3 min | 84.9% | 122 |
| LGA ATL LaGuardia Airport – Hartsfield Jackson Atlanta International Airport | 1,225 | -3.6 min | 98.2% | 55 |
| ORD MCI Chicago O'Hare International Airport – Kansas City International Airport | 647 | 18.4 min | 70.6% | 38 |
| BUF ORD Buffalo Niagara International Airport – Chicago O'Hare International Airport | 760 | -0.7 min | 94.4% | 36 |
| DCA BOS Ronald Reagan Washington National Airport – Boston Logan International Airport | 641 | 27.6 min | 62.1% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 1 | 1 | 100.0% | 0 |
| November 2024 | 32 | 32 | 96.9% | 0 |
| December 2024 | 46 | 46 | 82.6% | 0 |
| January 2025 | 13 | 13 | 92.3% | 0 |
| February 2025 | 34 | 34 | 97.1% | 0 |
| March 2025 | 56 | 56 | 92.9% | 0 |
| April 2025 | 14 | 13 | 76.9% | 1 |
| May 2025 | 6 | 6 | 66.7% | 0 |
| June 2025 | 13 | 13 | 92.3% | 0 |
| July 2025 | 27 | 24 | 66.7% | 3 |
| August 2025 | 30 | 30 | 80.0% | 0 |
| September 2025 | 46 | 46 | 93.5% | 0 |
| October 2025 | 33 | 33 | 72.7% | 0 |
| November 2025 | 46 | 44 | 79.6% | 2 |
| December 2025 | 45 | 43 | 44.2% | 2 |
| January 2026 | 35 | 35 | 94.3% | 0 |
| February 2026 | 25 | 25 | 88.0% | 0 |
| March 2026 | 27 | 24 | 75.0% | 3 |
| April 2026 | 44 | 43 | 97.7% | 1 |
| May 2026 | 39 | 39 | 87.2% | 0 |
| June 2026 | 26 | 26 | 100.0% | 0 |
| July 2026 | 27 | 24 | 87.5% | 3 |