WN1231
WN1231 (Southwest Airlines) is a multi-stop service on 40 routes, busiest Austin to San Jose. Of 787 departures recorded from October 2024 to July 2026, 70.4% left on time, according to the US BTS.
- On-time departures70.4%of 787 flights
- Average delay16.2 min
- July 202638▼ 15.6%vs July 2025
- Cancelled0.8%
- Legs flown under this number40
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 33 | 31 | ▼ 6.1% |
| February | 46 | 28 | ▼ 39.1% |
| March | 34 | 31 | ▼ 8.8% |
| April | 30 | 30 | 0.0% |
| May | 31 | 31 | 0.0% |
| June | 42 | 38 | ▼ 9.5% |
| July | 45 | 38 | ▼ 15.6% |
| August | 34 | – | – |
| September | 30 | – | – |
| October | 78 | – | in progress |
| November | 27 | – | – |
| December | 41 | – | – |
| Year to date (Jan–Jul) | 261 | 227 | ▼ 13.0% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 75.8% | 58.6% | ▼ 22.6% |
| February | 73.9% | 65.4% | ▼ 11.5% |
| March | 97.1% | 73.3% | ▼ 24.4% |
| April | 83.3% | 76.7% | ▼ 8.0% |
| May | 80.7% | 71.0% | ▼ 12.0% |
| June | 54.8% | 55.3% | ▲ 0.9% |
| July | 71.1% | 55.3% | ▼ 22.3% |
| August | 85.3% | – | – |
| September | 83.3% | – | – |
| October | 56.4% | – | in progress |
| November | 48.2% | – | – |
| December | 58.5% | – | – |
| Year-to-date average (Jan–Jul) | 76.7% | 65.1% | ▼ 15.1% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 2 | – |
| February | 0 | 2 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 5 |
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% 781
- Cancelled 0.8% 6
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
11Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 88.2% | 0 |
| November 2024 | 33 | 33 | 90.9% | 0 |
| December 2024 | 39 | 38 | 79.0% | 1 |
| January 2025 | 33 | 33 | 75.8% | 0 |
| February 2025 | 46 | 46 | 73.9% | 0 |
| March 2025 | 34 | 34 | 97.1% | 0 |
| April 2025 | 30 | 30 | 83.3% | 0 |
| May 2025 | 31 | 31 | 80.7% | 0 |
| June 2025 | 42 | 42 | 54.8% | 0 |
| July 2025 | 45 | 45 | 71.1% | 0 |
| August 2025 | 34 | 34 | 85.3% | 0 |
| September 2025 | 30 | 30 | 83.3% | 0 |
| October 2025 | 78 | 78 | 56.4% | 0 |
| November 2025 | 27 | 27 | 48.2% | 0 |
| December 2025 | 41 | 41 | 58.5% | 0 |
| January 2026 | 31 | 29 | 58.6% | 2 |
| February 2026 | 28 | 26 | 65.4% | 2 |
| March 2026 | 31 | 30 | 73.3% | 1 |
| April 2026 | 30 | 30 | 76.7% | 0 |
| May 2026 | 31 | 31 | 71.0% | 0 |
| June 2026 | 38 | 38 | 55.3% | 0 |
| July 2026 | 38 | 38 | 55.3% | 0 |