WN4512
WN4512 (Southwest Airlines) is a multi-stop service on 28 routes, busiest San Antonio to Dallas. Of 315 departures recorded from October 2024 to July 2026, 80.4% left on time, according to the US BTS.
- On-time departures80.4%of 315 flights
- Average delay8.7 min
- July 202631
- Cancelled1.3%
- Legs flown under this number28
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 | 2 | 1 | ▼ 50.0% |
| February | 8 | 14 | ▲ 75.0% |
| March | 14 | 18 | ▲ 28.6% |
| April | 6 | 17 | ▲ 183.3% |
| May | 5 | 18 | ▲ 260.0% |
| June | – | 28 | – |
| July | – | 31 | – |
| August | 37 | – | – |
| September | 43 | – | – |
| October | – | – | in progress |
| November | 13 | – | – |
| December | 12 | – | – |
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 | 100.0% | 100.0% | 0.0% |
| February | 62.5% | 84.6% | ▲ 35.4% |
| March | 61.5% | 76.5% | ▲ 24.3% |
| April | 83.3% | 100.0% | ▲ 20.0% |
| May | 60.0% | 100.0% | ▲ 66.7% |
| June | – | 78.6% | – |
| July | – | 96.7% | – |
| August | 62.2% | – | – |
| September | 86.1% | – | – |
| October | – | – | in progress |
| November | 76.9% | – | – |
| December | 58.3% | – | – |
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 | 1 | – |
| March | 1 | 1 | 0.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | – | 0 | – |
| July | – | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| 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 98.7% 311
- Cancelled 1.3% 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
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SAT DAL San Antonio International Airport – Dallas Love Field | 399 | 2.9 min | 91.8% | 50 |
| STL RSW St. Louis Lambert International Airport – Southwest Florida International Airport | 1,578 | -8.1 min | 100.0% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 14 | 14 | 78.6% | 0 |
| November 2024 | 26 | 26 | 80.8% | 0 |
| December 2024 | 8 | 8 | 87.5% | 0 |
| January 2025 | 2 | 2 | 100.0% | 0 |
| February 2025 | 8 | 8 | 62.5% | 0 |
| March 2025 | 14 | 13 | 61.5% | 1 |
| April 2025 | 6 | 6 | 83.3% | 0 |
| May 2025 | 5 | 5 | 60.0% | 0 |
| August 2025 | 37 | 37 | 62.2% | 0 |
| September 2025 | 43 | 43 | 86.1% | 0 |
| November 2025 | 13 | 13 | 76.9% | 0 |
| December 2025 | 12 | 12 | 58.3% | 0 |
| January 2026 | 1 | 1 | 100.0% | 0 |
| February 2026 | 14 | 13 | 84.6% | 1 |
| March 2026 | 18 | 17 | 76.5% | 1 |
| April 2026 | 17 | 17 | 100.0% | 0 |
| May 2026 | 18 | 18 | 100.0% | 0 |
| June 2026 | 28 | 28 | 78.6% | 0 |
| July 2026 | 31 | 30 | 96.7% | 1 |