WN4083
WN4083 (Southwest Airlines) is a multi-stop service on 16 routes, busiest St Louis to Houston. Of 342 departures recorded from October 2024 to July 2026, 74.5% left on time, according to the US BTS.
- On-time departures74.5%of 342 flights
- Average delay13.7 min
- July 202631
- Cancelled1.5%
- Legs flown under this number16
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods15 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 29 | 5 | ▼ 82.8% |
| February | 28 | 3 | ▼ 89.3% |
| March | 17 | – | – |
| April | 15 | – | – |
| May | 20 | – | – |
| June | 1 | 27 | ▲ 2,600.0% |
| July | – | 31 | – |
| August | 13 | – | – |
| September | 16 | – | – |
| October | 30 | – | in progress |
| November | 22 | – | – |
| December | 19 | – | – |
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 periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 77.8% | 40.0% | ▼ 48.6% |
| February | 82.1% | 66.7% | ▼ 18.8% |
| March | 76.5% | – | – |
| April | 60.0% | – | – |
| May | 70.0% | – | – |
| June | 0.0% | 85.2% | – |
| July | – | 100.0% | – |
| August | 30.8% | – | – |
| September | 37.5% | – | – |
| October | 89.7% | – | in progress |
| November | 72.7% | – | – |
| December | 33.3% | – | – |
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 periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | – | – |
| April | 0 | – | – |
| May | 0 | – | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
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 98.5% 337
- Cancelled 1.5% 5
Share of all recorded flights in the period, all legs. · Oct 13, 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 |
|---|---|---|---|---|
| STL HOU St. Louis Lambert International Airport – William P. Hobby Airport | 1,108 | 8.3 min | 81.1% | 109 |
| RDU DEN Raleigh-Durham International Airport – Denver International Airport | 2,307 | 9.5 min | 92.9% | 42 |
| PHX LGB Phoenix Sky Harbor International Airport – Long Beach International Airport | 570 | 26.1 min | 56.4% | 40 |
| LAX MSY Los Angeles International Airport – Louis Armstrong New Orleans International Airport | 2,682 | 18.6 min | 62.5% | 32 |
| ONT DAL Ontario International Airport – Dallas Love Field | 1,927 | 7.0 min | 90.0% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 88.2% | 0 |
| November 2024 | 25 | 25 | 92.0% | 0 |
| December 2024 | 24 | 23 | 73.9% | 1 |
| January 2025 | 29 | 27 | 77.8% | 2 |
| February 2025 | 28 | 28 | 82.1% | 0 |
| March 2025 | 17 | 17 | 76.5% | 0 |
| April 2025 | 15 | 15 | 60.0% | 0 |
| May 2025 | 20 | 20 | 70.0% | 0 |
| June 2025 | 1 | 1 | 0.0% | 0 |
| August 2025 | 13 | 13 | 30.8% | 0 |
| September 2025 | 16 | 16 | 37.5% | 0 |
| October 2025 | 30 | 29 | 89.7% | 1 |
| November 2025 | 22 | 22 | 72.7% | 0 |
| December 2025 | 19 | 18 | 33.3% | 1 |
| January 2026 | 5 | 5 | 40.0% | 0 |
| February 2026 | 3 | 3 | 66.7% | 0 |
| June 2026 | 27 | 27 | 85.2% | 0 |
| July 2026 | 31 | 31 | 100.0% | 0 |