WN4513
WN4513 (Southwest Airlines) is a multi-stop service on 21 routes, busiest San Jose to Ontario. Of 335 departures recorded from October 2024 to July 2026, 72.2% left on time, according to the US BTS.
- On-time departures72.2%of 335 flights
- Average delay17.7 min
- July 202630▲ 0.0%vs July 2025
- Cancelled0.3%
- Legs flown under this number21
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 | 1 | 2 | ▲ 100.0% |
| February | 6 | 10 | ▲ 66.7% |
| March | 10 | 13 | ▲ 30.0% |
| April | 8 | 6 | ▼ 25.0% |
| May | 10 | 5 | ▼ 50.0% |
| June | 27 | 27 | 0.0% |
| July | 30 | 30 | 0.0% |
| August | 38 | – | – |
| September | 38 | – | – |
| October | 31 | – | in progress |
| November | 18 | – | – |
| December | 6 | – | – |
| Year to date (Jan–Jul) | 92 | 93 | ▲ 1.1% |
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 | 100.0% | 50.0% | ▼ 50.0% |
| February | 100.0% | 100.0% | 0.0% |
| March | 70.0% | 38.5% | ▼ 45.1% |
| April | 75.0% | 66.7% | ▼ 11.1% |
| May | 60.0% | 100.0% | ▲ 66.7% |
| June | 70.4% | 33.3% | ▼ 52.6% |
| July | 76.7% | 56.7% | ▼ 26.1% |
| August | 86.8% | – | – |
| September | 89.5% | – | – |
| October | 100.0% | – | in progress |
| November | 50.0% | – | – |
| December | 66.7% | – | – |
| Year-to-date average (Jan–Jul) | 78.9% | 63.6% | ▼ 19.4% |
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 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 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 99.7% 334
- Cancelled 0.3% 1
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 |
|---|---|---|---|---|
| SJC ONT Mineta San Jose International Airport – Ontario International Airport | 536 | 23.4 min | 73.3% | 60 |
| SJC SAN Mineta San Jose International Airport – San Diego International Airport | 671 | 37.5 min | 45.6% | 57 |
| DEN BWI Denver International Airport – Baltimore/Washington International Thurgood Marshall Airport | 2,394 | -2.7 min | 100.0% | 38 |
| SMF DEN Sacramento International Airport – Denver International Airport | 1,460 | -0.5 min | 100.0% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 64.7% | 0 |
| November 2024 | 1 | 1 | 0.0% | 0 |
| December 2024 | 1 | 1 | 100.0% | 0 |
| January 2025 | 1 | 1 | 100.0% | 0 |
| February 2025 | 6 | 6 | 100.0% | 0 |
| March 2025 | 10 | 10 | 70.0% | 0 |
| April 2025 | 8 | 8 | 75.0% | 0 |
| May 2025 | 10 | 10 | 60.0% | 0 |
| June 2025 | 27 | 27 | 70.4% | 0 |
| July 2025 | 30 | 30 | 76.7% | 0 |
| August 2025 | 38 | 38 | 86.8% | 0 |
| September 2025 | 38 | 38 | 89.5% | 0 |
| October 2025 | 31 | 31 | 100.0% | 0 |
| November 2025 | 18 | 18 | 50.0% | 0 |
| December 2025 | 6 | 6 | 66.7% | 0 |
| January 2026 | 2 | 2 | 50.0% | 0 |
| February 2026 | 10 | 9 | 100.0% | 1 |
| March 2026 | 13 | 13 | 38.5% | 0 |
| April 2026 | 6 | 6 | 66.7% | 0 |
| May 2026 | 5 | 5 | 100.0% | 0 |
| June 2026 | 27 | 27 | 33.3% | 0 |
| July 2026 | 30 | 30 | 56.7% | 0 |