WN4642
WN4642 (Southwest Airlines) is a multi-stop service on 17 routes, busiest Los Angeles to San Francisco. Of 344 departures recorded from October 2024 to July 2026, 66.0% left on time, according to the US BTS.
- On-time departures66.0%of 344 flights
- Average delay20.2 min
- July 202623
- Cancelled0.0%
- Legs flown under this number17
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 23 | 8 | ▼ 65.2% |
| February | 24 | 18 | ▼ 25.0% |
| March | 24 | 22 | ▼ 8.3% |
| April | 20 | 5 | ▼ 75.0% |
| May | 23 | – | – |
| June | 2 | 19 | ▲ 850.0% |
| July | – | 23 | – |
| August | 3 | – | – |
| September | 4 | – | – |
| October | 68 | – | in progress |
| November | 6 | – | – |
| December | 11 | – | – |
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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 69.6% | 100.0% | ▲ 43.7% |
| February | 70.8% | 94.4% | ▲ 33.3% |
| March | 41.7% | 50.0% | ▲ 20.0% |
| April | 55.0% | 80.0% | ▲ 45.5% |
| May | 47.8% | – | – |
| June | 100.0% | 68.4% | ▼ 31.6% |
| July | – | 82.6% | – |
| August | 33.3% | – | – |
| September | 75.0% | – | – |
| October | 75.0% | – | in progress |
| November | 66.7% | – | – |
| December | 63.6% | – | – |
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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | – | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| 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 100.0% 344
- 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 |
|---|---|---|---|---|
| LAX SFO Los Angeles International Airport – San Francisco International Airport | 543 | 25.1 min | 63.8% | 69 |
| HOU STL William P. Hobby Airport – St. Louis Lambert International Airport | 1,108 | 11.8 min | 76.2% | 42 |
| MCO HOU Orlando International Airport – William P. Hobby Airport | 1,364 | 23.3 min | 55.0% | 40 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 63.2% | 0 |
| November 2024 | 15 | 15 | 33.3% | 0 |
| December 2024 | 7 | 7 | 71.4% | 0 |
| January 2025 | 23 | 23 | 69.6% | 0 |
| February 2025 | 24 | 24 | 70.8% | 0 |
| March 2025 | 24 | 24 | 41.7% | 0 |
| April 2025 | 20 | 20 | 55.0% | 0 |
| May 2025 | 23 | 23 | 47.8% | 0 |
| June 2025 | 2 | 2 | 100.0% | 0 |
| August 2025 | 3 | 3 | 33.3% | 0 |
| September 2025 | 4 | 4 | 75.0% | 0 |
| October 2025 | 68 | 68 | 75.0% | 0 |
| November 2025 | 6 | 6 | 66.7% | 0 |
| December 2025 | 11 | 11 | 63.6% | 0 |
| January 2026 | 8 | 8 | 100.0% | 0 |
| February 2026 | 18 | 18 | 94.4% | 0 |
| March 2026 | 22 | 22 | 50.0% | 0 |
| April 2026 | 5 | 5 | 80.0% | 0 |
| June 2026 | 19 | 19 | 68.4% | 0 |
| July 2026 | 23 | 23 | 82.6% | 0 |