WN4285
WN4285 (Southwest Airlines) is a multi-stop service on 14 routes, busiest Louisville to Baltimore. Of 348 departures recorded from October 2024 to July 2026, 73.5% left on time, according to the US BTS.
- On-time departures73.5%of 348 flights
- Average delay17.2 min
- July 202626
- Cancelled1.4%
- Legs flown under this number14
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods14 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 4 | 14 | ▲ 250.0% |
| February | – | 20 | – |
| March | 25 | 22 | ▼ 12.0% |
| April | 22 | 19 | ▼ 13.6% |
| May | 22 | 18 | ▼ 18.2% |
| June | 2 | 25 | ▲ 1,150.0% |
| July | – | 26 | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 28 | – | – |
| December | 31 | – | – |
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 periods14 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 75.0% | 75.0% | 0.0% |
| February | – | 50.0% | – |
| March | 76.0% | 60.0% | ▼ 21.1% |
| April | 90.9% | 89.5% | ▼ 1.6% |
| May | 50.0% | 83.3% | ▲ 66.7% |
| June | 50.0% | 56.0% | ▲ 12.0% |
| July | – | 53.9% | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 100.0% | – | – |
| December | 100.0% | – | – |
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 periods14 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 2 | – |
| February | – | 0 | – |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 1 | – | – |
| 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 98.6% 343
- Cancelled 1.4% 5
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
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SDF BWI Louisville Muhammad Ali International Airport – Baltimore/Washington International Thurgood Marshall Airport | 795 | 5.5 min | 98.4% | 64 |
| SMF PHX Sacramento International Airport – Phoenix Sky Harbor International Airport | 1,040 | 21.6 min | 55.1% | 49 |
| MSY BWI Louis Armstrong New Orleans International Airport – Baltimore/Washington International Thurgood Marshall Airport | 1,607 | 26.7 min | 66.7% | 39 |
| BOS BNA Boston Logan International Airport – Nashville International Airport | 1,514 | 42.1 min | 50.0% | 36 |
| MSP DEN Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field – Denver International Airport | 1,092 | 4.6 min | 82.4% | 34 |
| HOU LAS William P. Hobby Airport – Harry Reid International Airport | 1,985 | 11.3 min | 78.1% | 32 |
| BNA PHX Nashville International Airport – Phoenix Sky Harbor International Airport | 2,326 | 21.7 min | 57.1% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 32 | 32 | 93.8% | 0 |
| November 2024 | 22 | 22 | 54.6% | 0 |
| December 2024 | 16 | 16 | 43.8% | 0 |
| January 2025 | 4 | 4 | 75.0% | 0 |
| March 2025 | 25 | 25 | 76.0% | 0 |
| April 2025 | 22 | 22 | 90.9% | 0 |
| May 2025 | 22 | 22 | 50.0% | 0 |
| June 2025 | 2 | 2 | 50.0% | 0 |
| November 2025 | 28 | 27 | 100.0% | 1 |
| December 2025 | 31 | 31 | 100.0% | 0 |
| January 2026 | 14 | 12 | 75.0% | 2 |
| February 2026 | 20 | 20 | 50.0% | 0 |
| March 2026 | 22 | 20 | 60.0% | 2 |
| April 2026 | 19 | 19 | 89.5% | 0 |
| May 2026 | 18 | 18 | 83.3% | 0 |
| June 2026 | 25 | 25 | 56.0% | 0 |
| July 2026 | 26 | 26 | 53.9% | 0 |