WN4248
WN4248 (Southwest Airlines) is a multi-stop service on 23 routes, busiest San Jose to Long Beach. Of 408 departures recorded from October 2024 to July 2026, 74.6% left on time, according to the US BTS.
- On-time departures74.6%of 408 flights
- Average delay12.6 min
- July 202626▲ 550.0%vs July 2025
- Cancelled1.5%
- Legs flown under this number23
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 3 | 28 | ▲ 833.3% |
| February | 2 | 35 | ▲ 1,650.0% |
| March | 13 | 36 | ▲ 176.9% |
| April | 18 | 31 | ▲ 72.2% |
| May | 24 | 31 | ▲ 29.2% |
| June | 5 | 26 | ▲ 420.0% |
| July | 4 | 26 | ▲ 550.0% |
| August | 29 | – | – |
| September | 30 | – | – |
| October | 1 | – | in progress |
| November | 17 | – | – |
| December | 8 | – | – |
| Year to date (Jan–Jul) | 69 | 213 | ▲ 208.7% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 33.3% | 92.9% | ▲ 178.6% |
| February | 100.0% | 91.4% | ▼ 8.6% |
| March | 92.3% | 76.5% | ▼ 17.2% |
| April | 44.4% | 93.6% | ▲ 110.5% |
| May | 62.5% | 93.6% | ▲ 49.7% |
| June | 20.0% | 36.0% | ▲ 80.0% |
| July | 25.0% | 25.0% | 0.0% |
| August | 89.7% | – | – |
| September | 93.3% | – | – |
| October | 100.0% | – | in progress |
| November | 62.5% | – | – |
| December | 75.0% | – | – |
| Year-to-date average (Jan–Jul) | 53.9% | 72.7% | ▲ 34.8% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 2 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 5 |
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 98.5% 402
- Cancelled 1.5% 6
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SJC LGB Mineta San Jose International Airport – Long Beach International Airport | 522 | -0.8 min | 94.8% | 58 |
| OAK MDW Oakland San Francisco Bay Airport – Chicago Midway International Airport | 2,961 | 3.9 min | 93.1% | 58 |
| SDF MCO Louisville Muhammad Ali International Airport – Orlando International Airport | 1,158 | 0.5 min | 94.0% | 50 |
| MDW ALB Chicago Midway International Airport – Albany International Airport | 1,152 | 47.7 min | 26.1% | 49 |
| LAS SLC Harry Reid International Airport – Salt Lake City International Airport | 592 | 18.5 min | 59.4% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 11 | 11 | 81.8% | 0 |
| November 2024 | 16 | 16 | 81.3% | 0 |
| December 2024 | 14 | 14 | 71.4% | 0 |
| January 2025 | 3 | 3 | 33.3% | 0 |
| February 2025 | 2 | 2 | 100.0% | 0 |
| March 2025 | 13 | 13 | 92.3% | 0 |
| April 2025 | 18 | 18 | 44.4% | 0 |
| May 2025 | 24 | 24 | 62.5% | 0 |
| June 2025 | 5 | 5 | 20.0% | 0 |
| July 2025 | 4 | 4 | 25.0% | 0 |
| August 2025 | 29 | 29 | 89.7% | 0 |
| September 2025 | 30 | 30 | 93.3% | 0 |
| October 2025 | 1 | 1 | 100.0% | 0 |
| November 2025 | 17 | 16 | 62.5% | 1 |
| December 2025 | 8 | 8 | 75.0% | 0 |
| January 2026 | 28 | 28 | 92.9% | 0 |
| February 2026 | 35 | 35 | 91.4% | 0 |
| March 2026 | 36 | 34 | 76.5% | 2 |
| April 2026 | 31 | 31 | 93.6% | 0 |
| May 2026 | 31 | 31 | 93.6% | 0 |
| June 2026 | 26 | 25 | 36.0% | 1 |
| July 2026 | 26 | 24 | 25.0% | 2 |