WN4012
WN4012 (Southwest Airlines) is a multi-stop service on 33 routes, busiest New Orleans to Houston. Of 695 departures recorded from October 2024 to July 2026, 67.7% left on time, according to the US BTS.
- On-time departures67.7%of 695 flights
- Average delay20.3 min
- July 202631▼ 8.8%vs July 2025
- Cancelled1.0%
- Legs flown under this number33
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 | 18 | 19 | ▲ 5.6% |
| February | 15 | 11 | ▼ 26.7% |
| March | 27 | 33 | ▲ 22.2% |
| April | 39 | 30 | ▼ 23.1% |
| May | 44 | 30 | ▼ 31.8% |
| June | 35 | 29 | ▼ 17.1% |
| July | 34 | 31 | ▼ 8.8% |
| August | 46 | – | – |
| September | 47 | – | – |
| October | 31 | – | in progress |
| November | 5 | – | – |
| December | 11 | – | – |
| Year to date (Jan–Jul) | 212 | 183 | ▼ 13.7% |
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 | 50.0% | 88.9% | ▲ 77.8% |
| February | 86.7% | 70.0% | ▼ 19.2% |
| March | 65.4% | 78.1% | ▲ 19.5% |
| April | 69.2% | 60.0% | ▼ 13.3% |
| May | 50.0% | 70.0% | ▲ 40.0% |
| June | 29.4% | 62.1% | ▲ 111.1% |
| July | 48.5% | 77.4% | ▲ 59.7% |
| August | 73.9% | – | – |
| September | 56.5% | – | – |
| October | 71.0% | – | in progress |
| November | 80.0% | – | – |
| December | 72.7% | – | – |
| Year-to-date average (Jan–Jul) | 57.0% | 72.4% | ▲ 26.9% |
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 | 1 | – |
| February | 0 | 1 | – |
| March | 1 | 1 | 0.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 1 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 3 | 0.0% |
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 99.0% 688
- Cancelled 1.0% 7
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| MSY HOU Louis Armstrong New Orleans International Airport – William P. Hobby Airport | 485 | 40.1 min | 42.4% | 60 |
| SFO SAN San Francisco International Airport – San Diego International Airport | 719 | 15.5 min | 74.1% | 58 |
| DEN PIT Denver International Airport – Pittsburgh International Airport | 2,071 | 18.6 min | 69.0% | 58 |
| DEN MCI Denver International Airport – Kansas City International Airport | 855 | 31.2 min | 54.4% | 57 |
| ONT OAK Ontario International Airport – Oakland San Francisco Bay Airport | 582 | 20.3 min | 71.0% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 75.0% | 0 |
| November 2024 | 55 | 55 | 92.7% | 0 |
| December 2024 | 85 | 85 | 74.1% | 0 |
| January 2025 | 18 | 18 | 50.0% | 0 |
| February 2025 | 15 | 15 | 86.7% | 0 |
| March 2025 | 27 | 26 | 65.4% | 1 |
| April 2025 | 39 | 39 | 69.2% | 0 |
| May 2025 | 44 | 44 | 50.0% | 0 |
| June 2025 | 35 | 34 | 29.4% | 1 |
| July 2025 | 34 | 33 | 48.5% | 1 |
| August 2025 | 46 | 46 | 73.9% | 0 |
| September 2025 | 47 | 46 | 56.5% | 1 |
| October 2025 | 31 | 31 | 71.0% | 0 |
| November 2025 | 5 | 5 | 80.0% | 0 |
| December 2025 | 11 | 11 | 72.7% | 0 |
| January 2026 | 19 | 18 | 88.9% | 1 |
| February 2026 | 11 | 10 | 70.0% | 1 |
| March 2026 | 33 | 32 | 78.1% | 1 |
| April 2026 | 30 | 30 | 60.0% | 0 |
| May 2026 | 30 | 30 | 70.0% | 0 |
| June 2026 | 29 | 29 | 62.1% | 0 |
| July 2026 | 31 | 31 | 77.4% | 0 |