WN4566
WN4566 (Southwest Airlines) is a multi-stop service on 15 routes, busiest Austin to San Diego. Of 350 departures recorded from October 2024 to July 2026, 73.2% left on time, according to the US BTS.
- On-time departures73.2%of 350 flights
- Average delay12.2 min
- July 202627▲ 68.8%vs July 2025
- Cancelled0.9%
- 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 | – | 47 | – |
| February | – | 37 | – |
| March | 16 | 33 | ▲ 106.3% |
| April | 19 | 6 | ▼ 68.4% |
| May | 23 | – | – |
| June | 18 | 23 | ▲ 27.8% |
| July | 16 | 27 | ▲ 68.8% |
| August | 3 | – | – |
| September | – | – | – |
| October | 21 | – | in progress |
| November | 35 | – | – |
| December | 25 | – | – |
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 | – | 68.1% | – |
| February | – | 46.0% | – |
| March | 60.0% | 90.6% | ▲ 51.1% |
| April | 57.9% | 100.0% | ▲ 72.7% |
| May | 56.5% | – | – |
| June | 88.9% | 73.9% | ▼ 16.9% |
| July | 81.3% | 81.5% | ▲ 0.3% |
| August | 100.0% | – | – |
| September | – | – | – |
| October | 76.2% | – | in progress |
| November | 79.4% | – | – |
| December | 88.0% | – | – |
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 | – |
| February | – | 0 | – |
| March | 1 | 1 | 0.0% |
| April | 0 | 0 | – |
| May | 0 | – | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| 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 99.1% 347
- Cancelled 0.9% 3
Share of all recorded flights in the period, all legs. · Oct 27, 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 |
|---|---|---|---|---|
| AUS SAN Austin Bergstrom International Airport – San Diego International Airport | 1,871 | 20.3 min | 53.5% | 58 |
| BWI BUF Baltimore/Washington International Thurgood Marshall Airport – Buffalo Niagara International Airport | 453 | 5.1 min | 81.0% | 42 |
| HOU ELP William P. Hobby Airport – El Paso International Airport | 1,087 | 0.4 min | 92.7% | 41 |
| HOU SAT William P. Hobby Airport – San Antonio International Airport | 309 | 18.5 min | 60.0% | 40 |
| SMF ONT Sacramento International Airport – Ontario International Airport | 627 | 4.4 min | 85.7% | 35 |
| TPA CMH Tampa International Airport – John Glenn Columbus International Airport | 1,337 | -4.7 min | 96.9% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 1 | 1 | 100.0% | 0 |
| March 2025 | 16 | 15 | 60.0% | 1 |
| April 2025 | 19 | 19 | 57.9% | 0 |
| May 2025 | 23 | 23 | 56.5% | 0 |
| June 2025 | 18 | 18 | 88.9% | 0 |
| July 2025 | 16 | 16 | 81.3% | 0 |
| August 2025 | 3 | 3 | 100.0% | 0 |
| October 2025 | 21 | 21 | 76.2% | 0 |
| November 2025 | 35 | 34 | 79.4% | 1 |
| December 2025 | 25 | 25 | 88.0% | 0 |
| January 2026 | 47 | 47 | 68.1% | 0 |
| February 2026 | 37 | 37 | 46.0% | 0 |
| March 2026 | 33 | 32 | 90.6% | 1 |
| April 2026 | 6 | 6 | 100.0% | 0 |
| June 2026 | 23 | 23 | 73.9% | 0 |
| July 2026 | 27 | 27 | 81.5% | 0 |