WN4329
WN4329 (Southwest Airlines) is a multi-stop service on 12 routes, busiest Houston to Denver. Of 378 departures recorded from October 2024 to July 2026, 76.8% left on time, according to the US BTS.
- On-time departures76.8%of 378 flights
- Average delay16.0 min
- July 202630▲ 130.8%vs July 2025
- Cancelled0.8%
- Legs flown under this number12
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 21 | 13 | ▼ 38.1% |
| February | 17 | 16 | ▼ 5.9% |
| March | 3 | 29 | ▲ 866.7% |
| April | 20 | 27 | ▲ 35.0% |
| May | 26 | 27 | ▲ 3.8% |
| June | 16 | 30 | ▲ 87.5% |
| July | 13 | 30 | ▲ 130.8% |
| August | 2 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 19 | – | – |
| December | 17 | – | – |
| Year to date (Jan–Jul) | 116 | 172 | ▲ 48.3% |
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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 80.0% | 72.7% | ▼ 9.1% |
| February | 88.2% | 62.5% | ▼ 29.2% |
| March | 100.0% | 51.7% | ▼ 48.3% |
| April | 65.0% | 77.8% | ▲ 19.7% |
| May | 73.1% | 85.2% | ▲ 16.6% |
| June | 87.5% | 76.7% | ▼ 12.4% |
| July | 100.0% | 83.3% | ▼ 16.7% |
| August | 100.0% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 63.2% | – | – |
| December | 64.7% | – | – |
| Year-to-date average (Jan–Jul) | 84.8% | 72.8% | ▼ 14.1% |
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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 2 | ▲ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 2 | ▲ 100.0% |
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% 375
- Cancelled 0.8% 3
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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| HOU DEN William P. Hobby Airport – Denver International Airport | 1,422 | 11.4 min | 82.0% | 62 |
| DAL PHL Dallas Love Field – Philadelphia International Airport | 2,080 | 14.5 min | 80.7% | 57 |
| TPA MDW Tampa International Airport – Chicago Midway International Airport | 1,607 | 21.3 min | 70.0% | 50 |
| SMF DEN Sacramento International Airport – Denver International Airport | 1,460 | 6.1 min | 86.0% | 50 |
| SJC PSP Mineta San Jose International Airport – Palm Springs International Airport | 628 | 31.3 min | 64.7% | 36 |
| RSW IND Southwest Florida International Airport – Indianapolis International Airport | 1,525 | 37.6 min | 51.5% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 100.0% | 0 |
| November 2024 | 13 | 13 | 84.6% | 0 |
| December 2024 | 22 | 22 | 77.3% | 0 |
| January 2025 | 21 | 20 | 80.0% | 1 |
| February 2025 | 17 | 17 | 88.2% | 0 |
| March 2025 | 3 | 3 | 100.0% | 0 |
| April 2025 | 20 | 20 | 65.0% | 0 |
| May 2025 | 26 | 26 | 73.1% | 0 |
| June 2025 | 16 | 16 | 87.5% | 0 |
| July 2025 | 13 | 13 | 100.0% | 0 |
| August 2025 | 2 | 2 | 100.0% | 0 |
| November 2025 | 19 | 19 | 63.2% | 0 |
| December 2025 | 17 | 17 | 64.7% | 0 |
| January 2026 | 13 | 11 | 72.7% | 2 |
| February 2026 | 16 | 16 | 62.5% | 0 |
| March 2026 | 29 | 29 | 51.7% | 0 |
| April 2026 | 27 | 27 | 77.8% | 0 |
| May 2026 | 27 | 27 | 85.2% | 0 |
| June 2026 | 30 | 30 | 76.7% | 0 |
| July 2026 | 30 | 30 | 83.3% | 0 |