WN4532
WN4532 (Southwest Airlines) is a multi-stop service on 19 routes, busiest San Jose to Phoenix. Of 560 departures recorded from October 2024 to July 2026, 80.4% left on time, according to the US BTS.
- On-time departures80.4%of 560 flights
- Average delay8.1 min
- July 202641▲ 32.3%vs July 2025
- Cancelled0.9%
- Legs flown under this number19
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 | 11 | 32 | ▲ 190.9% |
| February | 23 | 28 | ▲ 21.7% |
| March | 13 | 36 | ▲ 176.9% |
| April | 15 | 29 | ▲ 93.3% |
| May | 19 | 26 | ▲ 36.8% |
| June | 27 | 38 | ▲ 40.7% |
| July | 31 | 41 | ▲ 32.3% |
| August | 18 | – | – |
| September | 17 | – | – |
| October | 14 | – | in progress |
| November | 39 | – | – |
| December | 35 | – | – |
| Year to date (Jan–Jul) | 139 | 230 | ▲ 65.5% |
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 | 90.9% | 75.0% | ▼ 17.5% |
| February | 73.9% | 64.3% | ▼ 13.0% |
| March | 84.6% | 77.8% | ▼ 8.1% |
| April | 80.0% | 96.6% | ▲ 20.7% |
| May | 52.6% | 88.5% | ▲ 68.1% |
| June | 88.5% | 73.7% | ▼ 16.7% |
| July | 90.3% | 78.1% | ▼ 13.6% |
| August | 100.0% | – | – |
| September | 100.0% | – | – |
| October | 85.7% | – | in progress |
| November | 84.6% | – | – |
| December | 68.6% | – | – |
| Year-to-date average (Jan–Jul) | 80.1% | 79.1% | ▼ 1.3% |
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 | 4 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 4 | ▲ 300.0% |
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 99.1% 555
- Cancelled 0.9% 5
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
10Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 16 | 16 | 93.8% | 0 |
| November 2024 | 24 | 24 | 79.2% | 0 |
| December 2024 | 28 | 28 | 67.9% | 0 |
| January 2025 | 11 | 11 | 90.9% | 0 |
| February 2025 | 23 | 23 | 73.9% | 0 |
| March 2025 | 13 | 13 | 84.6% | 0 |
| April 2025 | 15 | 15 | 80.0% | 0 |
| May 2025 | 19 | 19 | 52.6% | 0 |
| June 2025 | 27 | 26 | 88.5% | 1 |
| July 2025 | 31 | 31 | 90.3% | 0 |
| August 2025 | 18 | 18 | 100.0% | 0 |
| September 2025 | 17 | 17 | 100.0% | 0 |
| October 2025 | 14 | 14 | 85.7% | 0 |
| November 2025 | 39 | 39 | 84.6% | 0 |
| December 2025 | 35 | 35 | 68.6% | 0 |
| January 2026 | 32 | 28 | 75.0% | 4 |
| February 2026 | 28 | 28 | 64.3% | 0 |
| March 2026 | 36 | 36 | 77.8% | 0 |
| April 2026 | 29 | 29 | 96.6% | 0 |
| May 2026 | 26 | 26 | 88.5% | 0 |
| June 2026 | 38 | 38 | 73.7% | 0 |
| July 2026 | 41 | 41 | 78.1% | 0 |