WN51
WN51 (Southwest Airlines) is a multi-stop service on 16 routes, busiest Dallas to Houston. Of 543 departures recorded from November 2024 to July 2026, 67.5% left on time, according to the US BTS.
- On-time departures67.5%of 543 flights
- Average delay19.9 min
- July 20269▼ 62.5%vs July 2025
- Cancelled0.7%
- Legs flown under this number16
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 | 5 | 22 | ▲ 340.0% |
| February | 18 | 26 | ▲ 44.4% |
| March | 15 | 45 | ▲ 200.0% |
| April | 10 | 26 | ▲ 160.0% |
| May | 10 | 21 | ▲ 110.0% |
| June | 24 | 15 | ▼ 37.5% |
| July | 24 | 9 | ▼ 62.5% |
| August | 23 | – | – |
| September | 22 | – | – |
| October | 69 | – | in progress |
| November | 56 | – | – |
| December | 42 | – | – |
| Year to date (Jan–Jul) | 106 | 164 | ▲ 54.7% |
according to the US BTS · November 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 | 100.0% | 72.7% | ▼ 27.3% |
| February | 55.6% | 42.3% | ▼ 23.8% |
| March | 86.7% | 57.8% | ▼ 33.3% |
| April | 80.0% | 68.0% | ▼ 15.0% |
| May | 66.7% | 42.9% | ▼ 35.7% |
| June | 66.7% | 66.7% | 0.0% |
| July | 79.2% | 33.3% | ▼ 57.9% |
| August | 73.9% | – | – |
| September | 72.7% | – | – |
| October | 89.9% | – | in progress |
| November | 60.7% | – | – |
| December | 61.9% | – | – |
| Year-to-date average (Jan–Jul) | 76.4% | 54.8% | ▼ 28.2% |
according to the US BTS · November 2024 → July 2026
Average departure delay by month
according to the US BTS · November 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 1 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 1 | 0.0% |
according to the US BTS · November 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 99.3% 539
- Cancelled 0.7% 4
Share of all recorded flights in the period, all legs. · Nov 3, 2024 → Jul 25, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DAL HOU Dallas Love Field – William P. Hobby Airport | 386 | 22.8 min | 65.2% | 320 |
| HOU CRP William P. Hobby Airport – Corpus Christi International Airport | 301 | 20.2 min | 66.7% | 56 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| November 2024 | 29 | 28 | 67.9% | 1 |
| December 2024 | 32 | 31 | 67.7% | 1 |
| January 2025 | 5 | 5 | 100.0% | 0 |
| February 2025 | 18 | 18 | 55.6% | 0 |
| March 2025 | 15 | 15 | 86.7% | 0 |
| April 2025 | 10 | 10 | 80.0% | 0 |
| May 2025 | 10 | 9 | 66.7% | 1 |
| June 2025 | 24 | 24 | 66.7% | 0 |
| July 2025 | 24 | 24 | 79.2% | 0 |
| August 2025 | 23 | 23 | 73.9% | 0 |
| September 2025 | 22 | 22 | 72.7% | 0 |
| October 2025 | 69 | 69 | 89.9% | 0 |
| November 2025 | 56 | 56 | 60.7% | 0 |
| December 2025 | 42 | 42 | 61.9% | 0 |
| January 2026 | 22 | 22 | 72.7% | 0 |
| February 2026 | 26 | 26 | 42.3% | 0 |
| March 2026 | 45 | 45 | 57.8% | 0 |
| April 2026 | 26 | 25 | 68.0% | 1 |
| May 2026 | 21 | 21 | 42.9% | 0 |
| June 2026 | 15 | 15 | 66.7% | 0 |
| July 2026 | 9 | 9 | 33.3% | 0 |