WN40
WN40 (Southwest Airlines) is a multi-stop service on 20 routes, busiest Houston to Dallas. Of 749 departures recorded from October 2024 to July 2026, 64.7% left on time, according to the US BTS.
- On-time departures64.7%of 749 flights
- Average delay23.7 min
- July 202632▼ 20.0%vs July 2025
- Cancelled0.8%
- Legs flown under this number20
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 | 62 | 14 | ▼ 77.4% |
| February | 66 | 23 | ▼ 65.2% |
| March | 34 | 48 | ▲ 41.2% |
| April | 32 | 22 | ▼ 31.3% |
| May | 36 | 20 | ▼ 44.4% |
| June | 44 | 29 | ▼ 34.1% |
| July | 40 | 32 | ▼ 20.0% |
| August | 40 | – | – |
| September | 36 | – | – |
| October | 18 | – | in progress |
| November | 27 | – | – |
| December | 17 | – | – |
| Year to date (Jan–Jul) | 314 | 188 | ▼ 40.1% |
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 | 67.8% | 83.3% | ▲ 22.9% |
| February | 69.7% | 56.5% | ▼ 18.9% |
| March | 91.2% | 56.3% | ▼ 38.3% |
| April | 68.8% | 59.1% | ▼ 14.1% |
| May | 58.3% | 60.0% | ▲ 2.9% |
| June | 44.2% | 51.7% | ▲ 17.0% |
| July | 37.5% | 53.1% | ▲ 41.7% |
| August | 75.0% | – | – |
| September | 80.6% | – | – |
| October | 72.2% | – | in progress |
| November | 74.1% | – | – |
| December | 82.4% | – | – |
| Year-to-date average (Jan–Jul) | 62.5% | 60.0% | ▼ 4.0% |
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 | 3 | 2 | ▼ 33.3% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 2 | ▼ 50.0% |
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 99.2% 743
- Cancelled 0.8% 6
Share of all recorded flights in the period, all legs. · Oct 15, 2024 → Jul 31, 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 |
|---|---|---|---|---|
| HOU DAL William P. Hobby Airport – Dallas Love Field | 386 | 17.3 min | 71.0% | 410 |
| DAL MAF Dallas Love Field – Midland International Air and Space Port | 513 | 12.1 min | 75.0% | 44 |
| DAL DEN Dallas Love Field – Denver International Airport | 1,048 | 55.2 min | 31.8% | 44 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 12 | 12 | 75.0% | 0 |
| November 2024 | 49 | 49 | 61.2% | 0 |
| December 2024 | 48 | 48 | 72.9% | 0 |
| January 2025 | 62 | 59 | 67.8% | 3 |
| February 2025 | 66 | 66 | 69.7% | 0 |
| March 2025 | 34 | 34 | 91.2% | 0 |
| April 2025 | 32 | 32 | 68.8% | 0 |
| May 2025 | 36 | 36 | 58.3% | 0 |
| June 2025 | 44 | 43 | 44.2% | 1 |
| July 2025 | 40 | 40 | 37.5% | 0 |
| August 2025 | 40 | 40 | 75.0% | 0 |
| September 2025 | 36 | 36 | 80.6% | 0 |
| October 2025 | 18 | 18 | 72.2% | 0 |
| November 2025 | 27 | 27 | 74.1% | 0 |
| December 2025 | 17 | 17 | 82.4% | 0 |
| January 2026 | 14 | 12 | 83.3% | 2 |
| February 2026 | 23 | 23 | 56.5% | 0 |
| March 2026 | 48 | 48 | 56.3% | 0 |
| April 2026 | 22 | 22 | 59.1% | 0 |
| May 2026 | 20 | 20 | 60.0% | 0 |
| June 2026 | 29 | 29 | 51.7% | 0 |
| July 2026 | 32 | 32 | 53.1% | 0 |