WN4247
WN4247 (Southwest Airlines) is a multi-stop service on 15 routes, busiest San Jose to Long Beach. Of 363 departures recorded from October 2024 to July 2026, 76.5% left on time, according to the US BTS.
- On-time departures76.5%of 363 flights
- Average delay14.1 min
- July 202627▲ 0.0%vs July 2025
- Cancelled0.6%
- Legs flown under this number15
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 29 | ▲ 2,800.0% |
| February | 2 | 25 | ▲ 1,150.0% |
| March | 13 | 4 | ▼ 69.2% |
| April | 9 | 24 | ▲ 166.7% |
| May | 8 | 30 | ▲ 275.0% |
| June | 23 | 26 | ▲ 13.0% |
| July | 27 | 27 | 0.0% |
| August | 3 | – | – |
| September | – | – | – |
| October | 22 | – | in progress |
| November | 27 | – | – |
| December | 22 | – | – |
| Year to date (Jan–Jul) | 83 | 165 | ▲ 98.8% |
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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 100.0% | 100.0% | 0.0% |
| February | 100.0% | 80.0% | ▼ 20.0% |
| March | 61.5% | 100.0% | ▲ 62.5% |
| April | 77.8% | 91.7% | ▲ 17.9% |
| May | 75.0% | 100.0% | ▲ 33.3% |
| June | 36.4% | 69.2% | ▲ 90.4% |
| July | 29.6% | 77.8% | ▲ 162.5% |
| August | 100.0% | – | – |
| September | – | – | – |
| October | 81.8% | – | in progress |
| November | 81.5% | – | – |
| December | 86.4% | – | – |
| Year-to-date average (Jan–Jul) | 68.6% | 88.4% | ▲ 28.8% |
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 periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 1 | 0.0% |
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 99.4% 361
- Cancelled 0.6% 2
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 |
|---|---|---|---|---|
| SJC LGB Mineta San Jose International Airport – Long Beach International Airport | 522 | -0.9 min | 96.5% | 57 |
| MDW BWI Chicago Midway International Airport – Baltimore/Washington International Thurgood Marshall Airport | 981 | 5.1 min | 90.7% | 55 |
| LGA STL LaGuardia Airport – St. Louis Lambert International Airport | 1,426 | 57.0 min | 35.3% | 52 |
| SJC DEN Mineta San Jose International Airport – Denver International Airport | 1,522 | 15.2 min | 72.0% | 50 |
| MCI DCA Kansas City International Airport – Ronald Reagan Washington National Airport | 1,524 | 1.1 min | 87.0% | 46 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 75.0% | 0 |
| November 2024 | 15 | 15 | 86.7% | 0 |
| December 2024 | 6 | 6 | 50.0% | 0 |
| January 2025 | 1 | 1 | 100.0% | 0 |
| February 2025 | 2 | 2 | 100.0% | 0 |
| March 2025 | 13 | 13 | 61.5% | 0 |
| April 2025 | 9 | 9 | 77.8% | 0 |
| May 2025 | 8 | 8 | 75.0% | 0 |
| June 2025 | 23 | 22 | 36.4% | 1 |
| July 2025 | 27 | 27 | 29.6% | 0 |
| August 2025 | 3 | 3 | 100.0% | 0 |
| October 2025 | 22 | 22 | 81.8% | 0 |
| November 2025 | 27 | 27 | 81.5% | 0 |
| December 2025 | 22 | 22 | 86.4% | 0 |
| January 2026 | 29 | 28 | 100.0% | 1 |
| February 2026 | 25 | 25 | 80.0% | 0 |
| March 2026 | 4 | 4 | 100.0% | 0 |
| April 2026 | 24 | 24 | 91.7% | 0 |
| May 2026 | 30 | 30 | 100.0% | 0 |
| June 2026 | 26 | 26 | 69.2% | 0 |
| July 2026 | 27 | 27 | 77.8% | 0 |