WN4543
WN4543 (Southwest Airlines) is a multi-stop service on 15 routes, busiest Austin to Long Beach. Of 311 departures recorded from October 2024 to July 2026, 67.1% left on time, according to the US BTS.
- On-time departures67.1%of 311 flights
- Average delay18.8 min
- July 202616
- Cancelled0.3%
- Legs flown under this number15
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 | 5 | 5 | 0.0% |
| February | 8 | – | – |
| March | 23 | 4 | ▼ 82.6% |
| April | 18 | 28 | ▲ 55.6% |
| May | 18 | 36 | ▲ 100.0% |
| June | 2 | 7 | ▲ 250.0% |
| July | – | 16 | – |
| August | – | – | – |
| September | – | – | – |
| October | 25 | – | in progress |
| November | 29 | – | – |
| 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 periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 80.0% | 40.0% | ▼ 50.0% |
| February | 100.0% | – | – |
| March | 73.9% | 75.0% | ▲ 1.5% |
| April | 72.2% | 78.6% | ▲ 8.8% |
| May | 66.7% | 75.0% | ▲ 12.5% |
| June | 100.0% | 85.7% | ▼ 14.3% |
| July | – | 81.3% | – |
| August | – | – | – |
| September | – | – | – |
| October | 76.0% | – | in progress |
| November | 34.5% | – | – |
| December | 48.4% | – | – |
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 periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | – | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| October | 0 | – | 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 99.7% 310
- Cancelled 0.3% 1
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
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| AUS LGB Austin Bergstrom International Airport – Long Beach International Airport | 1,970 | 24.2 min | 41.3% | 63 |
| TPA BWI Tampa International Airport – Baltimore/Washington International Thurgood Marshall Airport | 1,358 | 17.3 min | 77.6% | 58 |
| STL MCI St. Louis Lambert International Airport – Kansas City International Airport | 380 | 10.5 min | 71.9% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 7 | 7 | 100.0% | 0 |
| November 2024 | 31 | 30 | 73.3% | 1 |
| December 2024 | 18 | 18 | 33.3% | 0 |
| January 2025 | 5 | 5 | 80.0% | 0 |
| February 2025 | 8 | 8 | 100.0% | 0 |
| March 2025 | 23 | 23 | 73.9% | 0 |
| April 2025 | 18 | 18 | 72.2% | 0 |
| May 2025 | 18 | 18 | 66.7% | 0 |
| June 2025 | 2 | 2 | 100.0% | 0 |
| October 2025 | 25 | 25 | 76.0% | 0 |
| November 2025 | 29 | 29 | 34.5% | 0 |
| December 2025 | 31 | 31 | 48.4% | 0 |
| January 2026 | 5 | 5 | 40.0% | 0 |
| March 2026 | 4 | 4 | 75.0% | 0 |
| April 2026 | 28 | 28 | 78.6% | 0 |
| May 2026 | 36 | 36 | 75.0% | 0 |
| June 2026 | 7 | 7 | 85.7% | 0 |
| July 2026 | 16 | 16 | 81.3% | 0 |