WN4644
WN4644 (Southwest Airlines) is a multi-stop service on 10 routes, busiest Denver to Memphis. Of 207 departures recorded from October 2024 to July 2026, 75.2% left on time, according to the US BTS.
- On-time departures75.2%of 207 flights
- Average delay13.2 min
- July 202614
- Cancelled0.5%
- Legs flown under this number10
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods11 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 28 | 5 | ▼ 82.1% |
| February | 28 | – | – |
| March | 5 | 4 | ▼ 20.0% |
| April | – | 1 | – |
| May | – | – | – |
| June | – | 12 | – |
| July | – | 14 | – |
| August | – | – | – |
| September | – | – | – |
| October | 2 | – | in progress |
| November | 26 | – | – |
| December | 29 | – | – |
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 periods11 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 67.9% | 100.0% | ▲ 47.4% |
| February | 67.9% | – | – |
| March | 80.0% | 25.0% | ▼ 68.8% |
| April | – | 100.0% | – |
| May | – | – | – |
| June | – | 58.3% | – |
| July | – | 64.3% | – |
| August | – | – | – |
| September | – | – | – |
| October | 100.0% | – | in progress |
| November | 80.0% | – | – |
| December | 89.7% | – | – |
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 periods11 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | – | – |
| March | 0 | 0 | – |
| April | – | 0 | – |
| May | – | – | – |
| June | – | 0 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| 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 99.5% 206
- Cancelled 0.5% 1
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
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN MEM Denver International Airport – Frederick W. Smith International Airport | 1,401 | 17.9 min | 71.4% | 91 |
| ELP DAL El Paso International Airport – Dallas Love Field | 902 | 2.0 min | 88.9% | 55 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 13 | 13 | 92.3% | 0 |
| November 2024 | 22 | 22 | 68.2% | 0 |
| December 2024 | 18 | 18 | 83.3% | 0 |
| January 2025 | 28 | 28 | 67.9% | 0 |
| February 2025 | 28 | 28 | 67.9% | 0 |
| March 2025 | 5 | 5 | 80.0% | 0 |
| October 2025 | 2 | 2 | 100.0% | 0 |
| November 2025 | 26 | 25 | 80.0% | 1 |
| December 2025 | 29 | 29 | 89.7% | 0 |
| January 2026 | 5 | 5 | 100.0% | 0 |
| March 2026 | 4 | 4 | 25.0% | 0 |
| April 2026 | 1 | 1 | 100.0% | 0 |
| June 2026 | 12 | 12 | 58.3% | 0 |
| July 2026 | 14 | 14 | 64.3% | 0 |