WN3974
WN3974 (Southwest Airlines) is a multi-stop service on 22 routes, busiest St Louis to Dallas. Of 363 departures recorded from October 2024 to July 2026, 72.8% left on time, according to the US BTS.
- On-time departures72.8%of 363 flights
- Average delay13.4 min
- July 20264
- Cancelled0.8%
- Legs flown under this number22
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods16 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 5 | 8 | ▲ 60.0% |
| February | 8 | 11 | ▲ 37.5% |
| March | 17 | 42 | ▲ 147.1% |
| April | 27 | 26 | ▼ 3.7% |
| May | 30 | 24 | ▼ 20.0% |
| June | 4 | 7 | ▲ 75.0% |
| July | – | 4 | – |
| August | – | – | – |
| September | – | – | – |
| October | 30 | – | in progress |
| November | 28 | – | – |
| December | 29 | – | – |
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 periods16 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 60.0% | 87.5% | ▲ 45.8% |
| February | 87.5% | 63.6% | ▼ 27.3% |
| March | 82.4% | 64.3% | ▼ 21.9% |
| April | 70.4% | 80.0% | ▲ 13.7% |
| May | 76.7% | 50.0% | ▼ 34.8% |
| June | 100.0% | 100.0% | 0.0% |
| July | – | 75.0% | – |
| August | – | – | – |
| September | – | – | – |
| October | 86.7% | – | in progress |
| November | 66.7% | – | – |
| December | 57.1% | – | – |
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 periods16 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 1 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 1 | – | – |
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 99.2% 360
- Cancelled 0.8% 3
Share of all recorded flights in the period, all legs. · Oct 14, 2024 → Jul 26, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| STL DAL St. Louis Lambert International Airport – Dallas Love Field | 878 | 17.2 min | 63.2% | 59 |
| SJC LAX Mineta San Jose International Airport – Los Angeles International Airport | 496 | 10.9 min | 73.7% | 57 |
| PVD MDW Rhode Island T. F. Green International Airport – Chicago Midway International Airport | 1,352 | 13.1 min | 63.4% | 42 |
| MSY MDW Louis Armstrong New Orleans International Airport – Chicago Midway International Airport | 1,331 | 4.6 min | 87.1% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 13 | 13 | 76.9% | 0 |
| November 2024 | 26 | 26 | 80.8% | 0 |
| December 2024 | 24 | 24 | 75.0% | 0 |
| January 2025 | 5 | 5 | 60.0% | 0 |
| February 2025 | 8 | 8 | 87.5% | 0 |
| March 2025 | 17 | 17 | 82.4% | 0 |
| April 2025 | 27 | 27 | 70.4% | 0 |
| May 2025 | 30 | 30 | 76.7% | 0 |
| June 2025 | 4 | 4 | 100.0% | 0 |
| October 2025 | 30 | 30 | 86.7% | 0 |
| November 2025 | 28 | 27 | 66.7% | 1 |
| December 2025 | 29 | 28 | 57.1% | 1 |
| January 2026 | 8 | 8 | 87.5% | 0 |
| February 2026 | 11 | 11 | 63.6% | 0 |
| March 2026 | 42 | 42 | 64.3% | 0 |
| April 2026 | 26 | 25 | 80.0% | 1 |
| May 2026 | 24 | 24 | 50.0% | 0 |
| June 2026 | 7 | 7 | 100.0% | 0 |
| July 2026 | 4 | 4 | 75.0% | 0 |