WN3967
WN3967 (Southwest Airlines) is a multi-stop service on 21 routes, busiest Kansas City to St Louis. Of 401 departures recorded from October 2024 to July 2026, 80.6% left on time, according to the US BTS.
- On-time departures80.6%of 401 flights
- Average delay8.2 min
- July 202630▼ 3.2%vs July 2025
- Cancelled1.0%
- Legs flown under this number21
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 28 | 1 | ▼ 96.4% |
| February | 26 | 3 | ▼ 88.5% |
| March | 39 | 8 | ▼ 79.5% |
| April | 15 | 15 | 0.0% |
| May | 8 | 17 | ▲ 112.5% |
| June | 27 | 28 | ▲ 3.7% |
| July | 31 | 30 | ▼ 3.2% |
| August | 4 | – | – |
| September | – | – | – |
| October | 30 | – | in progress |
| November | 14 | – | – |
| December | 6 | – | – |
| Year to date (Jan–Jul) | 174 | 102 | ▼ 41.4% |
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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 80.8% | 100.0% | ▲ 23.8% |
| February | 96.0% | 100.0% | ▲ 4.2% |
| March | 61.5% | 100.0% | ▲ 62.5% |
| April | 66.7% | 80.0% | ▲ 20.0% |
| May | 50.0% | 87.5% | ▲ 75.0% |
| June | 77.8% | 89.3% | ▲ 14.8% |
| July | 77.4% | 93.3% | ▲ 20.6% |
| August | 75.0% | – | – |
| September | – | – | – |
| October | 76.7% | – | in progress |
| November | 64.3% | – | – |
| December | 66.7% | – | – |
| Year-to-date average (Jan–Jul) | 72.9% | 92.9% | ▲ 27.4% |
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 periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 0 | ▼ 100.0% |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 1 | ▼ 66.7% |
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 99.0% 397
- Cancelled 1.0% 4
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 |
|---|---|---|---|---|
| MCI STL Kansas City International Airport – St. Louis Lambert International Airport | 380 | 3.3 min | 84.9% | 109 |
| LAS HNL Harry Reid International Airport – Daniel K. Inouye International Airport | 4,441 | 9.9 min | 77.1% | 61 |
| STL PHX St. Louis Lambert International Airport – Phoenix Sky Harbor International Airport | 2,026 | 0.2 min | 97.6% | 42 |
| LAX SMF Los Angeles International Airport – Sacramento International Airport | 600 | 21.1 min | 63.6% | 33 |
| PVD BWI Rhode Island T. F. Green International Airport – Baltimore/Washington International Thurgood Marshall Airport | 526 | 4.6 min | 83.3% | 31 |
| MSY DEN Louis Armstrong New Orleans International Airport – Denver International Airport | 1,708 | 8.0 min | 77.4% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 13 | 13 | 100.0% | 0 |
| November 2024 | 28 | 28 | 82.1% | 0 |
| December 2024 | 30 | 30 | 86.7% | 0 |
| January 2025 | 28 | 26 | 80.8% | 2 |
| February 2025 | 26 | 25 | 96.0% | 1 |
| March 2025 | 39 | 39 | 61.5% | 0 |
| April 2025 | 15 | 15 | 66.7% | 0 |
| May 2025 | 8 | 8 | 50.0% | 0 |
| June 2025 | 27 | 27 | 77.8% | 0 |
| July 2025 | 31 | 31 | 77.4% | 0 |
| August 2025 | 4 | 4 | 75.0% | 0 |
| October 2025 | 30 | 30 | 76.7% | 0 |
| November 2025 | 14 | 14 | 64.3% | 0 |
| December 2025 | 6 | 6 | 66.7% | 0 |
| January 2026 | 1 | 1 | 100.0% | 0 |
| February 2026 | 3 | 3 | 100.0% | 0 |
| March 2026 | 8 | 8 | 100.0% | 0 |
| April 2026 | 15 | 15 | 80.0% | 0 |
| May 2026 | 17 | 16 | 87.5% | 1 |
| June 2026 | 28 | 28 | 89.3% | 0 |
| July 2026 | 30 | 30 | 93.3% | 0 |