WN4775
WN4775 (Southwest Airlines) is a multi-stop service on 18 routes, busiest Baltimore to Islip. Of 249 departures recorded from October 2024 to July 2026, 83.7% left on time, according to the US BTS.
- On-time departures83.7%of 249 flights
- Average delay9.1 min
- July 202617▼ 32.0%vs July 2025
- Cancelled1.6%
- Legs flown under this number18
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods13 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 31 | ▲ 3,000.0% |
| February | – | 42 | – |
| March | 26 | 9 | ▼ 65.4% |
| April | 7 | 1 | ▼ 85.7% |
| May | – | – | – |
| June | 24 | 16 | ▼ 33.3% |
| July | 25 | 17 | ▼ 32.0% |
| August | 5 | – | – |
| September | – | – | – |
| October | 4 | – | in progress |
| November | – | – | – |
| December | – | – | – |
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 periods13 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 100.0% | 86.2% | ▼ 13.8% |
| February | – | 95.0% | – |
| March | 100.0% | 100.0% | 0.0% |
| April | 100.0% | 100.0% | 0.0% |
| May | – | – | – |
| June | 70.8% | 87.5% | ▲ 23.5% |
| July | 60.0% | 88.2% | ▲ 47.1% |
| August | 60.0% | – | – |
| September | – | – | – |
| October | 25.0% | – | in progress |
| November | – | – | – |
| December | – | – | – |
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 periods13 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 2 | – |
| February | – | 2 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | – | – | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | – | – | – |
| December | – | – | – |
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 98.4% 245
- Cancelled 1.6% 4
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
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BWI ISP Baltimore/Washington International Thurgood Marshall Airport – Long Island MacArthur Airport | 353 | 3.5 min | 89.3% | 58 |
| STL MKE St. Louis Lambert International Airport – General Mitchell International Airport | 511 | 2.9 min | 87.9% | 33 |
| MSP STL Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field – St. Louis Lambert International Airport | 722 | -3.6 min | 100.0% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 80.0% | 0 |
| November 2024 | 15 | 15 | 80.0% | 0 |
| December 2024 | 6 | 6 | 83.3% | 0 |
| January 2025 | 1 | 1 | 100.0% | 0 |
| March 2025 | 26 | 26 | 100.0% | 0 |
| April 2025 | 7 | 7 | 100.0% | 0 |
| June 2025 | 24 | 24 | 70.8% | 0 |
| July 2025 | 25 | 25 | 60.0% | 0 |
| August 2025 | 5 | 5 | 60.0% | 0 |
| October 2025 | 4 | 4 | 25.0% | 0 |
| January 2026 | 31 | 29 | 86.2% | 2 |
| February 2026 | 42 | 40 | 95.0% | 2 |
| March 2026 | 9 | 9 | 100.0% | 0 |
| April 2026 | 1 | 1 | 100.0% | 0 |
| June 2026 | 16 | 16 | 87.5% | 0 |
| July 2026 | 17 | 17 | 88.2% | 0 |