WN4585
WN4585 (Southwest Airlines) is a multi-stop service on 13 routes, busiest Chicago to Birmingham. Of 274 departures recorded from October 2024 to July 2026, 76.6% left on time, according to the US BTS.
- On-time departures76.6%of 274 flights
- Average delay12.3 min
- July 202617
- Cancelled0.4%
- Legs flown under this number13
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods12 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 35 | 1 | ▼ 97.1% |
| February | 27 | – | – |
| March | 32 | – | – |
| April | 7 | – | – |
| May | 12 | – | – |
| June | 1 | 16 | ▲ 1,500.0% |
| July | – | 17 | – |
| August | – | – | – |
| September | – | – | – |
| October | 22 | – | in progress |
| November | 2 | – | – |
| December | 2 | – | – |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods12 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 74.3% | 100.0% | ▲ 34.6% |
| February | 77.8% | – | – |
| March | 64.5% | – | – |
| April | 57.1% | – | – |
| May | 83.3% | – | – |
| June | 100.0% | 43.8% | ▼ 56.3% |
| July | – | 76.5% | – |
| August | – | – | – |
| September | – | – | – |
| October | 54.6% | – | in progress |
| November | 50.0% | – | – |
| December | 50.0% | – | – |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods12 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | – | – |
| March | 1 | – | – |
| April | 0 | – | – |
| May | 0 | – | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 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 99.6% 273
- Cancelled 0.4% 1
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 |
|---|---|---|---|---|
| MDW BHM Chicago Midway International Airport – Birmingham-Shuttlesworth International Airport | 919 | 4.8 min | 82.5% | 103 |
| JAX DAL Jacksonville International Airport – Dallas Love Field | 1,457 | 36.6 min | 60.6% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 94.1% | 0 |
| November 2024 | 43 | 43 | 95.4% | 0 |
| December 2024 | 40 | 40 | 87.5% | 0 |
| January 2025 | 35 | 35 | 74.3% | 0 |
| February 2025 | 27 | 27 | 77.8% | 0 |
| March 2025 | 32 | 31 | 64.5% | 1 |
| April 2025 | 7 | 7 | 57.1% | 0 |
| May 2025 | 12 | 12 | 83.3% | 0 |
| June 2025 | 1 | 1 | 100.0% | 0 |
| October 2025 | 22 | 22 | 54.6% | 0 |
| November 2025 | 2 | 2 | 50.0% | 0 |
| December 2025 | 2 | 2 | 50.0% | 0 |
| January 2026 | 1 | 1 | 100.0% | 0 |
| June 2026 | 16 | 16 | 43.8% | 0 |
| July 2026 | 17 | 17 | 76.5% | 0 |