WN4572
WN4572 (Southwest Airlines) is a multi-stop service on 10 routes, busiest Sacramento to San Diego. Of 315 departures recorded from April 2025 to July 2026, 63.6% left on time, according to the US BTS.
- On-time departures63.6%of 315 flights
- Average delay19.3 min
- July 202627▼ 22.9%vs July 2025
- Cancelled0.6%
- Legs flown under this number10
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods15 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 5 | – |
| February | – | 10 | – |
| March | – | 1 | – |
| April | 23 | 24 | ▲ 4.3% |
| May | 31 | 30 | ▼ 3.2% |
| June | 34 | 26 | ▼ 23.5% |
| July | 35 | 27 | ▼ 22.9% |
| August | 8 | – | – |
| September | 4 | – | – |
| October | – | – | in progress |
| November | 28 | – | – |
| December | 29 | – | – |
according to the US BTS · April 2025 → 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 periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 100.0% | – |
| February | – | 77.8% | – |
| March | – | 100.0% | – |
| April | 73.9% | 54.2% | ▼ 26.7% |
| May | 48.4% | 53.3% | ▲ 10.2% |
| June | 55.9% | 88.5% | ▲ 58.3% |
| July | 34.3% | 84.6% | ▲ 146.8% |
| August | 37.5% | – | – |
| September | 75.0% | – | – |
| October | – | – | in progress |
| November | 67.9% | – | – |
| December | 82.8% | – | – |
according to the US BTS · April 2025 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · April 2025 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 0 | – |
| February | – | 1 | – |
| March | – | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | – | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
according to the US BTS · April 2025 → 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% 313
- Cancelled 0.6% 2
Share of all recorded flights in the period, all legs. · Apr 8, 2025 → 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 |
|---|---|---|---|---|
| SMF SAN Sacramento International Airport – San Diego International Airport | 773 | 21.7 min | 45.9% | 61 |
| DAL ELP Dallas Love Field – El Paso International Airport | 902 | 9.5 min | 80.0% | 60 |
| HOU LAS William P. Hobby Airport – Harry Reid International Airport | 1,985 | 21.4 min | 58.6% | 58 |
| TPA MKE Tampa International Airport – General Mitchell International Airport | 1,733 | 32.0 min | 56.1% | 57 |
| LGA HOU LaGuardia Airport – William P. Hobby Airport | 2,295 | 13.8 min | 85.7% | 50 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| April 2025 | 23 | 23 | 73.9% | 0 |
| May 2025 | 31 | 31 | 48.4% | 0 |
| June 2025 | 34 | 34 | 55.9% | 0 |
| July 2025 | 35 | 35 | 34.3% | 0 |
| August 2025 | 8 | 8 | 37.5% | 0 |
| September 2025 | 4 | 4 | 75.0% | 0 |
| November 2025 | 28 | 28 | 67.9% | 0 |
| December 2025 | 29 | 29 | 82.8% | 0 |
| January 2026 | 5 | 5 | 100.0% | 0 |
| February 2026 | 10 | 9 | 77.8% | 1 |
| March 2026 | 1 | 1 | 100.0% | 0 |
| April 2026 | 24 | 24 | 54.2% | 0 |
| May 2026 | 30 | 30 | 53.3% | 0 |
| June 2026 | 26 | 26 | 88.5% | 0 |
| July 2026 | 27 | 26 | 84.6% | 1 |