WN4383
WN4383 (Southwest Airlines) is a multi-stop service on 16 routes, busiest Sacramento to Phoenix. Of 349 departures recorded from October 2024 to July 2026, 62.9% left on time, according to the US BTS.
- On-time departures62.9%of 349 flights
- Average delay21.1 min
- July 202626▲ 36.8%vs July 2025
- Cancelled1.2%
- Legs flown under this number16
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 | – | 16 | – |
| March | – | 41 | – |
| April | 20 | 30 | ▲ 50.0% |
| May | 25 | 26 | ▲ 4.0% |
| June | 18 | 27 | ▲ 50.0% |
| July | 19 | 26 | ▲ 36.8% |
| August | 2 | – | – |
| September | – | – | – |
| October | 4 | – | in progress |
| November | 28 | – | – |
| December | 31 | – | – |
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 periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 60.0% | – |
| February | – | 81.3% | – |
| March | – | 73.2% | – |
| April | 65.0% | 56.7% | ▼ 12.8% |
| May | 64.0% | 73.1% | ▲ 14.2% |
| June | 38.9% | 38.5% | ▼ 1.1% |
| July | 52.6% | 39.1% | ▼ 25.7% |
| August | 50.0% | – | – |
| September | – | – | – |
| October | 100.0% | – | in progress |
| November | 67.9% | – | – |
| December | 77.4% | – | – |
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 periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 0 | – |
| February | – | 0 | – |
| March | – | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 3 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | 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 98.9% 345
- Cancelled 1.1% 4
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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SMF PHX Sacramento International Airport – Phoenix Sky Harbor International Airport | 1,040 | 17.7 min | 73.0% | 63 |
| SMF SNA Sacramento International Airport – John Wayne Orange County International Airport | 650 | 8.4 min | 73.5% | 49 |
| OAK ONT Oakland San Francisco Bay Airport – Ontario International Airport | 582 | 19.4 min | 65.3% | 49 |
| BWI SRQ Baltimore/Washington International Thurgood Marshall Airport – Sarasota Bradenton International Airport | 1,419 | 41.6 min | 35.9% | 42 |
| SAN DEN San Diego International Airport – Denver International Airport | 1,371 | 30.0 min | 42.9% | 35 |
| SAN SJC San Diego International Airport – Mineta San Jose International Airport | 671 | 18.7 min | 72.7% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 28 | 28 | 67.9% | 0 |
| November 2024 | 3 | 3 | 100.0% | 0 |
| April 2025 | 20 | 20 | 65.0% | 0 |
| May 2025 | 25 | 25 | 64.0% | 0 |
| June 2025 | 18 | 18 | 38.9% | 0 |
| July 2025 | 19 | 19 | 52.6% | 0 |
| August 2025 | 2 | 2 | 50.0% | 0 |
| October 2025 | 4 | 4 | 100.0% | 0 |
| November 2025 | 28 | 28 | 67.9% | 0 |
| December 2025 | 31 | 31 | 77.4% | 0 |
| January 2026 | 5 | 5 | 60.0% | 0 |
| February 2026 | 16 | 16 | 81.3% | 0 |
| March 2026 | 41 | 41 | 73.2% | 0 |
| April 2026 | 30 | 30 | 56.7% | 0 |
| May 2026 | 26 | 26 | 73.1% | 0 |
| June 2026 | 27 | 26 | 38.5% | 1 |
| July 2026 | 26 | 23 | 39.1% | 3 |