WN4443
WN4443 (Southwest Airlines) is a multi-stop service on 17 routes, busiest Baltimore to San Juan. Of 385 departures recorded from October 2024 to July 2026, 75.2% left on time, according to the US BTS.
- On-time departures75.2%of 385 flights
- Average delay13.7 min
- July 202623▼ 23.3%vs July 2025
- Cancelled0.5%
- 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 periods16 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 4 | 31 | ▲ 675.0% |
| February | – | 28 | – |
| March | 32 | 4 | ▼ 87.5% |
| April | 29 | – | – |
| May | 25 | – | – |
| June | 30 | 19 | ▼ 36.7% |
| July | 30 | 23 | ▼ 23.3% |
| August | 7 | – | – |
| September | 4 | – | – |
| October | 18 | – | in progress |
| November | 28 | – | – |
| December | 31 | – | – |
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 periods16 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 75.0% | 83.3% | ▲ 11.1% |
| February | – | 60.7% | – |
| March | 81.3% | 75.0% | ▼ 7.7% |
| April | 64.3% | – | – |
| May | 40.0% | – | – |
| June | 90.0% | 89.5% | ▼ 0.6% |
| July | 83.3% | 73.9% | ▼ 11.3% |
| August | 71.4% | – | – |
| September | 50.0% | – | – |
| October | 55.6% | – | in progress |
| November | 85.7% | – | – |
| December | 83.9% | – | – |
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 periods16 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | – | 0 | – |
| March | 0 | 0 | – |
| April | 1 | – | – |
| May | 0 | – | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | 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 99.5% 383
- Cancelled 0.5% 2
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BWI SJU Baltimore/Washington International Thurgood Marshall Airport – Luis Munoz Marin International Airport | 2,525 | 13.2 min | 74.8% | 100 |
| STL TPA St. Louis Lambert International Airport – Tampa International Airport | 1,400 | 7.7 min | 85.9% | 64 |
| SAT STL San Antonio International Airport – St. Louis Lambert International Airport | 1,266 | 5.1 min | 84.3% | 51 |
| BNA HOU Nashville International Airport – William P. Hobby Airport | 1,078 | 26.7 min | 53.1% | 49 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 9 | 9 | 77.8% | 0 |
| November 2024 | 17 | 17 | 76.5% | 0 |
| December 2024 | 16 | 16 | 81.3% | 0 |
| January 2025 | 4 | 4 | 75.0% | 0 |
| March 2025 | 32 | 32 | 81.3% | 0 |
| April 2025 | 29 | 28 | 64.3% | 1 |
| May 2025 | 25 | 25 | 40.0% | 0 |
| June 2025 | 30 | 30 | 90.0% | 0 |
| July 2025 | 30 | 30 | 83.3% | 0 |
| August 2025 | 7 | 7 | 71.4% | 0 |
| September 2025 | 4 | 4 | 50.0% | 0 |
| October 2025 | 18 | 18 | 55.6% | 0 |
| November 2025 | 28 | 28 | 85.7% | 0 |
| December 2025 | 31 | 31 | 83.9% | 0 |
| January 2026 | 31 | 30 | 83.3% | 1 |
| February 2026 | 28 | 28 | 60.7% | 0 |
| March 2026 | 4 | 4 | 75.0% | 0 |
| June 2026 | 19 | 19 | 89.5% | 0 |
| July 2026 | 23 | 23 | 73.9% | 0 |