WN4500
WN4500 (Southwest Airlines) is a multi-stop service on 17 routes, busiest St Louis to New Orleans. Of 323 departures recorded from October 2024 to July 2026, 76.3% left on time, according to the US BTS.
- On-time departures76.3%of 323 flights
- Average delay15.0 min
- July 202628▲ 250.0%vs July 2025
- Cancelled0.9%
- Legs flown under this number17
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 | 3 | 2 | ▼ 33.3% |
| February | – | 10 | – |
| March | 4 | 12 | ▲ 200.0% |
| April | 21 | 30 | ▲ 42.9% |
| May | 26 | 35 | ▲ 34.6% |
| June | 12 | 27 | ▲ 125.0% |
| July | 8 | 28 | ▲ 250.0% |
| August | 13 | – | – |
| September | 12 | – | – |
| October | – | – | in progress |
| November | 24 | – | – |
| December | 20 | – | – |
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 | 50.0% | 50.0% | 0.0% |
| February | – | 100.0% | – |
| March | 50.0% | 90.9% | ▲ 81.8% |
| April | 76.2% | 93.3% | ▲ 22.5% |
| May | 64.0% | 94.3% | ▲ 47.3% |
| June | 50.0% | 51.9% | ▲ 3.7% |
| July | 62.5% | 64.3% | ▲ 2.9% |
| August | 92.3% | – | – |
| September | 100.0% | – | – |
| October | – | – | in progress |
| November | 83.3% | – | – |
| December | 85.0% | – | – |
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 | 0 | ▼ 100.0% |
| February | – | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | – | – | 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 99.1% 320
- Cancelled 0.9% 3
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
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| STL MSY St. Louis Lambert International Airport – Louis Armstrong New Orleans International Airport | 974 | 0.9 min | 94.7% | 57 |
| PDX PHX Portland International Airport – Phoenix Sky Harbor International Airport | 1,625 | 24.2 min | 66.0% | 51 |
| CLE MCO Cleveland Hopkins International Airport – Orlando International Airport | 1,444 | 13.0 min | 84.4% | 45 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 9 | 9 | 55.6% | 0 |
| November 2024 | 15 | 15 | 66.7% | 0 |
| December 2024 | 12 | 12 | 66.7% | 0 |
| January 2025 | 3 | 2 | 50.0% | 1 |
| March 2025 | 4 | 4 | 50.0% | 0 |
| April 2025 | 21 | 21 | 76.2% | 0 |
| May 2025 | 26 | 25 | 64.0% | 1 |
| June 2025 | 12 | 12 | 50.0% | 0 |
| July 2025 | 8 | 8 | 62.5% | 0 |
| August 2025 | 13 | 13 | 92.3% | 0 |
| September 2025 | 12 | 12 | 100.0% | 0 |
| November 2025 | 24 | 24 | 83.3% | 0 |
| December 2025 | 20 | 20 | 85.0% | 0 |
| January 2026 | 2 | 2 | 50.0% | 0 |
| February 2026 | 10 | 10 | 100.0% | 0 |
| March 2026 | 12 | 11 | 90.9% | 1 |
| April 2026 | 30 | 30 | 93.3% | 0 |
| May 2026 | 35 | 35 | 94.3% | 0 |
| June 2026 | 27 | 27 | 51.9% | 0 |
| July 2026 | 28 | 28 | 64.3% | 0 |