WN31
WN31 (Southwest Airlines) is a multi-stop service on 9 routes, busiest Dallas to Houston. Of 313 departures recorded from October 2024 to July 2026, 86.9% left on time, according to the US BTS.
- On-time departures86.9%of 313 flights
- Average delay6.5 min
- July 20269▲ 12.5%vs July 2025
- Cancelled0.3%
- Legs flown under this number9
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 57 | ▲ 2,750.0% |
| February | – | 27 | – |
| March | 4 | 9 | ▲ 125.0% |
| April | 19 | 12 | ▼ 36.8% |
| May | 22 | 13 | ▼ 40.9% |
| June | 12 | 9 | ▼ 25.0% |
| July | 8 | 9 | ▲ 12.5% |
| August | 10 | – | – |
| September | 8 | – | – |
| October | 32 | – | in progress |
| November | 14 | – | – |
| December | 32 | – | – |
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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 50.0% | 100.0% | ▲ 100.0% |
| February | – | 88.9% | – |
| March | 100.0% | 100.0% | 0.0% |
| April | 89.5% | 50.0% | ▼ 44.1% |
| May | 95.5% | 66.7% | ▼ 30.2% |
| June | 83.3% | 77.8% | ▼ 6.7% |
| July | 62.5% | 88.9% | ▲ 42.2% |
| August | 70.0% | – | – |
| September | 87.5% | – | – |
| October | 93.8% | – | in progress |
| November | 92.9% | – | – |
| December | 87.5% | – | – |
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 periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | – | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| 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% 312
- Cancelled 0.3% 1
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 29, 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 |
|---|---|---|---|---|
| DAL HOU Dallas Love Field – William P. Hobby Airport | 386 | 11.7 min | 81.1% | 181 |
| STL LIT St. Louis Lambert International Airport – Bill & Hillary Clinton National Airport/Adams Field | 477 | -1.8 min | 95.1% | 41 |
| LIT DAL Bill & Hillary Clinton National Airport/Adams Field – Dallas Love Field | 476 | -4.2 min | 100.0% | 41 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 3 | 3 | 100.0% | 0 |
| November 2024 | 3 | 3 | 66.7% | 0 |
| December 2024 | 8 | 8 | 50.0% | 0 |
| January 2025 | 2 | 2 | 50.0% | 0 |
| March 2025 | 4 | 4 | 100.0% | 0 |
| April 2025 | 19 | 19 | 89.5% | 0 |
| May 2025 | 22 | 22 | 95.5% | 0 |
| June 2025 | 12 | 12 | 83.3% | 0 |
| July 2025 | 8 | 8 | 62.5% | 0 |
| August 2025 | 10 | 10 | 70.0% | 0 |
| September 2025 | 8 | 8 | 87.5% | 0 |
| October 2025 | 32 | 32 | 93.8% | 0 |
| November 2025 | 14 | 14 | 92.9% | 0 |
| December 2025 | 32 | 32 | 87.5% | 0 |
| January 2026 | 57 | 57 | 100.0% | 0 |
| February 2026 | 27 | 27 | 88.9% | 0 |
| March 2026 | 9 | 9 | 100.0% | 0 |
| April 2026 | 12 | 12 | 50.0% | 0 |
| May 2026 | 13 | 12 | 66.7% | 1 |
| June 2026 | 9 | 9 | 77.8% | 0 |
| July 2026 | 9 | 9 | 88.9% | 0 |