WN4397
WN4397 (Southwest Airlines) is a multi-stop service on 18 routes, busiest Sacramento to Santa Ana. Of 376 departures recorded from October 2024 to July 2026, 69.4% left on time, according to the US BTS.
- On-time departures69.4%of 376 flights
- Average delay17.5 min
- July 202632
- Cancelled0.8%
- Legs flown under this number18
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 | 30 | 4 | ▼ 86.7% |
| February | 25 | 10 | ▼ 60.0% |
| March | 5 | 24 | ▲ 380.0% |
| April | – | 21 | – |
| May | – | 23 | – |
| June | – | 27 | – |
| July | – | 32 | – |
| August | 31 | – | – |
| September | 34 | – | – |
| October | 13 | – | in progress |
| November | 26 | – | – |
| December | 29 | – | – |
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 | 93.1% | 100.0% | ▲ 7.4% |
| February | 96.0% | 100.0% | ▲ 4.2% |
| March | 100.0% | 45.8% | ▼ 54.2% |
| April | – | 61.9% | – |
| May | – | 69.6% | – |
| June | – | 29.6% | – |
| July | – | 28.1% | – |
| August | 66.7% | – | – |
| September | 78.8% | – | – |
| October | 100.0% | – | in progress |
| November | 73.1% | – | – |
| December | 75.9% | – | – |
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 | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | – | 0 | – |
| May | – | 0 | – |
| June | – | 0 | – |
| July | – | 0 | – |
| August | 1 | – | – |
| September | 1 | – | – |
| 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 99.2% 373
- Cancelled 0.8% 3
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SMF SNA Sacramento International Airport – John Wayne Orange County International Airport | 650 | 16.9 min | 76.3% | 59 |
| STL LGA St. Louis Lambert International Airport – LaGuardia Airport | 1,426 | 15.9 min | 69.6% | 58 |
| ATL MDW Hartsfield Jackson Atlanta International Airport – Chicago Midway International Airport | 952 | 3.9 min | 93.6% | 48 |
| LAS SFO Harry Reid International Airport – San Francisco International Airport | 665 | 54.7 min | 16.7% | 42 |
| SNA PHX John Wayne Orange County International Airport – Phoenix Sky Harbor International Airport | 544 | 18.8 min | 62.5% | 40 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 6 | 6 | 83.3% | 0 |
| November 2024 | 20 | 20 | 85.0% | 0 |
| December 2024 | 16 | 16 | 62.5% | 0 |
| January 2025 | 30 | 29 | 93.1% | 1 |
| February 2025 | 25 | 25 | 96.0% | 0 |
| March 2025 | 5 | 5 | 100.0% | 0 |
| August 2025 | 31 | 30 | 66.7% | 1 |
| September 2025 | 34 | 33 | 78.8% | 1 |
| October 2025 | 13 | 13 | 100.0% | 0 |
| November 2025 | 26 | 26 | 73.1% | 0 |
| December 2025 | 29 | 29 | 75.9% | 0 |
| January 2026 | 4 | 4 | 100.0% | 0 |
| February 2026 | 10 | 10 | 100.0% | 0 |
| March 2026 | 24 | 24 | 45.8% | 0 |
| April 2026 | 21 | 21 | 61.9% | 0 |
| May 2026 | 23 | 23 | 69.6% | 0 |
| June 2026 | 27 | 27 | 29.6% | 0 |
| July 2026 | 32 | 32 | 28.1% | 0 |