WN4044
WN4044 (Southwest Airlines) is a multi-stop service on 19 routes, busiest Phoenix to Dulles. Of 332 departures recorded from October 2024 to July 2026, 73.3% left on time, according to the US BTS.
- On-time departures73.3%of 332 flights
- Average delay14.2 min
- July 202630
- Cancelled0.9%
- Legs flown under this number19
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 | 1 | 3 | ▲ 200.0% |
| February | 2 | 11 | ▲ 450.0% |
| March | 5 | 24 | ▲ 380.0% |
| April | 4 | 29 | ▲ 625.0% |
| May | 6 | 30 | ▲ 400.0% |
| June | – | 26 | – |
| July | – | 30 | – |
| August | 26 | – | – |
| September | 30 | – | – |
| October | 30 | – | in progress |
| November | 38 | – | – |
| December | 25 | – | – |
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 | 0.0% | 100.0% | – |
| February | 0.0% | 63.6% | – |
| March | 80.0% | 13.0% | ▼ 83.7% |
| April | 75.0% | 75.9% | ▲ 1.1% |
| May | 66.7% | 76.7% | ▲ 15.0% |
| June | – | 57.7% | – |
| July | – | 62.1% | – |
| August | 80.8% | – | – |
| September | 90.0% | – | – |
| October | 100.0% | – | in progress |
| November | 81.6% | – | – |
| December | 79.2% | – | – |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | – | 0 | – |
| July | – | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | 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 99.1% 329
- Cancelled 0.9% 3
Share of all recorded flights in the period, all legs. · Oct 15, 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 |
|---|---|---|---|---|
| RSW MKE Southwest Florida International Airport – General Mitchell International Airport | 1,908 | 7.9 min | 84.2% | 57 |
| PHX IAD Phoenix Sky Harbor International Airport – Washington Dulles International Airport | 3,141 | 11.1 min | 86.0% | 57 |
| MDW LGA Chicago Midway International Airport – LaGuardia Airport | 1,164 | 15.5 min | 57.1% | 50 |
| DTW BWI Detroit Metropolitan Wayne County Airport – Baltimore/Washington International Thurgood Marshall Airport | 657 | 8.3 min | 77.8% | 46 |
| OGG HNL Kahului International Airport – Daniel K. Inouye International Airport | 162 | -6.1 min | 100.0% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 7 | 7 | 100.0% | 0 |
| November 2024 | 2 | 2 | 100.0% | 0 |
| December 2024 | 3 | 3 | 66.7% | 0 |
| January 2025 | 1 | 1 | 0.0% | 0 |
| February 2025 | 2 | 2 | 0.0% | 0 |
| March 2025 | 5 | 5 | 80.0% | 0 |
| April 2025 | 4 | 4 | 75.0% | 0 |
| May 2025 | 6 | 6 | 66.7% | 0 |
| August 2025 | 26 | 26 | 80.8% | 0 |
| September 2025 | 30 | 30 | 90.0% | 0 |
| October 2025 | 30 | 30 | 100.0% | 0 |
| November 2025 | 38 | 38 | 81.6% | 0 |
| December 2025 | 25 | 24 | 79.2% | 1 |
| January 2026 | 3 | 3 | 100.0% | 0 |
| February 2026 | 11 | 11 | 63.6% | 0 |
| March 2026 | 24 | 23 | 13.0% | 1 |
| April 2026 | 29 | 29 | 75.9% | 0 |
| May 2026 | 30 | 30 | 76.7% | 0 |
| June 2026 | 26 | 26 | 57.7% | 0 |
| July 2026 | 30 | 29 | 62.1% | 1 |