WN4481
WN4481 (Southwest Airlines) is a multi-stop service on 17 routes, busiest St Louis to Kansas City. Of 333 departures recorded from October 2024 to July 2026, 81.7% left on time, according to the US BTS.
- On-time departures81.7%of 333 flights
- Average delay9.5 min
- July 202627▲ 68.8%vs July 2025
- Cancelled1.5%
- Legs flown under this number17
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods15 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 19 | ▲ 1,800.0% |
| February | – | 40 | – |
| March | – | 31 | – |
| April | 23 | 30 | ▲ 30.4% |
| May | 31 | 31 | 0.0% |
| June | 20 | 26 | ▲ 30.0% |
| July | 16 | 27 | ▲ 68.8% |
| August | 3 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 15 | – | – |
| December | 4 | – | – |
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 periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 0.0% | 93.3% | – |
| February | – | 92.3% | – |
| March | – | 93.6% | – |
| April | 95.7% | 93.3% | ▼ 2.4% |
| May | 96.8% | 93.6% | ▼ 3.3% |
| June | 35.0% | 76.9% | ▲ 119.8% |
| July | 31.3% | 88.9% | ▲ 184.4% |
| August | 0.0% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 60.0% | – | – |
| 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 periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 4 | – |
| February | – | 1 | – |
| March | – | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | – | – | 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 98.5% 328
- Cancelled 1.5% 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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| STL MCI St. Louis Lambert International Airport – Kansas City International Airport | 380 | 1.4 min | 91.4% | 58 |
| SAN BWI San Diego International Airport – Baltimore/Washington International Thurgood Marshall Airport | 3,686 | 0.3 min | 96.6% | 58 |
| HOU ELP William P. Hobby Airport – El Paso International Airport | 1,087 | 5.8 min | 84.0% | 50 |
| SFO LAX San Francisco International Airport – Los Angeles International Airport | 543 | 54.7 min | 22.9% | 35 |
| SMF HNL Sacramento International Airport – Daniel K. Inouye International Airport | 3,960 | 0.5 min | 97.0% | 33 |
| BWI RIC Baltimore/Washington International Thurgood Marshall Airport – Richmond International Airport | 194 | -1.3 min | 96.3% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 10 | 10 | 80.0% | 0 |
| November 2024 | 3 | 3 | 66.7% | 0 |
| December 2024 | 3 | 3 | 33.3% | 0 |
| January 2025 | 1 | 1 | 0.0% | 0 |
| April 2025 | 23 | 23 | 95.7% | 0 |
| May 2025 | 31 | 31 | 96.8% | 0 |
| June 2025 | 20 | 20 | 35.0% | 0 |
| July 2025 | 16 | 16 | 31.3% | 0 |
| August 2025 | 3 | 3 | 0.0% | 0 |
| November 2025 | 15 | 15 | 60.0% | 0 |
| December 2025 | 4 | 4 | 100.0% | 0 |
| January 2026 | 19 | 15 | 93.3% | 4 |
| February 2026 | 40 | 39 | 92.3% | 1 |
| March 2026 | 31 | 31 | 93.6% | 0 |
| April 2026 | 30 | 30 | 93.3% | 0 |
| May 2026 | 31 | 31 | 93.6% | 0 |
| June 2026 | 26 | 26 | 76.9% | 0 |
| July 2026 | 27 | 27 | 88.9% | 0 |