WN4544
WN4544 (Southwest Airlines) is a multi-stop service on 17 routes, busiest Raleigh to St Louis. Of 382 departures recorded from October 2024 to July 2026, 79.8% left on time, according to the US BTS.
- On-time departures79.8%of 382 flights
- Average delay11.9 min
- July 202627▼ 37.2%vs July 2025
- Cancelled1.3%
- 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 | 46 | ▲ 1,433.3% |
| February | 2 | 56 | ▲ 2,700.0% |
| March | 8 | 8 | 0.0% |
| April | 14 | 3 | ▼ 78.6% |
| May | 17 | 5 | ▼ 70.6% |
| June | 40 | 23 | ▼ 42.5% |
| July | 43 | 27 | ▼ 37.2% |
| August | 6 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 28 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 127 | 168 | ▲ 32.3% |
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 | 66.7% | 97.6% | ▲ 46.3% |
| February | 100.0% | 87.5% | ▼ 12.5% |
| March | 0.0% | 100.0% | – |
| April | 50.0% | 0.0% | ▼ 100.0% |
| May | 41.2% | 40.0% | ▼ 2.9% |
| June | 77.5% | 78.3% | ▲ 1.0% |
| July | 83.7% | 77.8% | ▼ 7.1% |
| August | 100.0% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 89.3% | – | – |
| December | 93.6% | – | – |
| Year-to-date average (Jan–Jul) | 59.9% | 68.7% | ▲ 14.8% |
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 | 0 | 5 | – |
| 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) | 0 | 5 |
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 98.7% 377
- Cancelled 1.3% 5
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| RDU STL Raleigh-Durham International Airport – St. Louis Lambert International Airport | 1,072 | 2.6 min | 92.2% | 64 |
| SAN HOU San Diego International Airport – William P. Hobby Airport | 2,109 | -0.5 min | 96.7% | 60 |
| LAS LBB Harry Reid International Airport – Lubbock Preston Smith International Airport | 1,244 | 0.3 min | 94.6% | 58 |
| MCO ISP Orlando International Airport – Long Island MacArthur Airport | 1,565 | 4.3 min | 88.2% | 34 |
| STL DEN St. Louis Lambert International Airport – Denver International Airport | 1,236 | 54.6 min | 41.9% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 80.0% | 0 |
| November 2024 | 2 | 2 | 100.0% | 0 |
| January 2025 | 3 | 3 | 66.7% | 0 |
| February 2025 | 2 | 2 | 100.0% | 0 |
| March 2025 | 8 | 8 | 0.0% | 0 |
| April 2025 | 14 | 14 | 50.0% | 0 |
| May 2025 | 17 | 17 | 41.2% | 0 |
| June 2025 | 40 | 40 | 77.5% | 0 |
| July 2025 | 43 | 43 | 83.7% | 0 |
| August 2025 | 6 | 6 | 100.0% | 0 |
| November 2025 | 28 | 28 | 89.3% | 0 |
| December 2025 | 31 | 31 | 93.6% | 0 |
| January 2026 | 46 | 41 | 97.6% | 5 |
| February 2026 | 56 | 56 | 87.5% | 0 |
| March 2026 | 8 | 8 | 100.0% | 0 |
| April 2026 | 3 | 3 | 0.0% | 0 |
| May 2026 | 5 | 5 | 40.0% | 0 |
| June 2026 | 23 | 23 | 78.3% | 0 |
| July 2026 | 27 | 27 | 77.8% | 0 |