WN4589
WN4589 (Southwest Airlines) is a multi-stop service on 15 routes, busiest San Jose to Ontario. Of 346 departures recorded from October 2024 to July 2026, 87.3% left on time, according to the US BTS.
- On-time departures87.3%of 346 flights
- Average delay4.6 min
- July 202631
- Cancelled0.0%
- 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 periods13 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 27 | 39 | ▲ 44.4% |
| February | 24 | 47 | ▲ 95.8% |
| March | 4 | 45 | ▲ 1,025.0% |
| April | – | 9 | – |
| May | – | – | – |
| June | – | 27 | – |
| July | – | 31 | – |
| August | 3 | – | – |
| September | 4 | – | – |
| October | – | – | in progress |
| November | 5 | – | – |
| December | 12 | – | – |
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 | 92.6% | 94.9% | ▲ 2.5% |
| February | 87.5% | 93.6% | ▲ 7.0% |
| March | 75.0% | 77.8% | ▲ 3.7% |
| April | – | 100.0% | – |
| May | – | – | – |
| June | – | 92.6% | – |
| July | – | 100.0% | – |
| August | 66.7% | – | – |
| September | 100.0% | – | – |
| October | – | – | in progress |
| November | 60.0% | – | – |
| December | 75.0% | – | – |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | – | 0 | – |
| May | – | – | – |
| June | – | 0 | – |
| July | – | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | – | – | 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 100.0% 346
- Cancelled 0.0% 0
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 |
|---|---|---|---|---|
| SJC ONT Mineta San Jose International Airport – Ontario International Airport | 536 | 5.3 min | 84.7% | 98 |
| LAS SMF Harry Reid International Airport – Sacramento International Airport | 639 | -2.1 min | 96.6% | 58 |
| LAS OMA Harry Reid International Airport – Eppley Airfield | 1,765 | -3.6 min | 98.3% | 58 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 79.0% | 0 |
| November 2024 | 28 | 28 | 85.7% | 0 |
| December 2024 | 22 | 22 | 68.2% | 0 |
| January 2025 | 27 | 27 | 92.6% | 0 |
| February 2025 | 24 | 24 | 87.5% | 0 |
| March 2025 | 4 | 4 | 75.0% | 0 |
| August 2025 | 3 | 3 | 66.7% | 0 |
| September 2025 | 4 | 4 | 100.0% | 0 |
| November 2025 | 5 | 5 | 60.0% | 0 |
| December 2025 | 12 | 12 | 75.0% | 0 |
| January 2026 | 39 | 39 | 94.9% | 0 |
| February 2026 | 47 | 47 | 93.6% | 0 |
| March 2026 | 45 | 45 | 77.8% | 0 |
| April 2026 | 9 | 9 | 100.0% | 0 |
| June 2026 | 27 | 27 | 92.6% | 0 |
| July 2026 | 31 | 31 | 100.0% | 0 |