WN4541
WN4541 (Southwest Airlines) is a multi-stop service on 20 routes, busiest San Jose to Los Angeles. Of 378 departures recorded from October 2024 to July 2026, 70.1% left on time, according to the US BTS.
- On-time departures70.1%of 378 flights
- Average delay16.3 min
- July 202645▲ 73.1%vs July 2025
- Cancelled0.0%
- Legs flown under this number20
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 | 28 | – | – |
| February | 26 | 1 | ▼ 96.2% |
| March | 5 | – | – |
| April | 23 | – | – |
| May | 33 | – | – |
| June | 26 | 39 | ▲ 50.0% |
| July | 26 | 45 | ▲ 73.1% |
| August | 10 | – | – |
| September | 8 | – | – |
| October | 14 | – | in progress |
| November | 1 | – | – |
| December | 1 | – | – |
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 | 85.7% | – | – |
| February | 73.1% | 100.0% | ▲ 36.8% |
| March | 80.0% | – | – |
| April | 60.9% | – | – |
| May | 66.7% | – | – |
| June | 65.4% | 53.9% | ▼ 17.6% |
| July | 88.5% | 46.7% | ▼ 47.2% |
| August | 40.0% | – | – |
| September | 75.0% | – | – |
| October | 100.0% | – | in progress |
| November | 0.0% | – | – |
| December | 0.0% | – | – |
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 | 0 | – |
| March | 0 | – | – |
| April | 0 | – | – |
| May | 0 | – | – |
| June | 0 | 0 | – |
| July | 0 | 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% 378
- 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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SJC LAX Mineta San Jose International Airport – Los Angeles International Airport | 496 | 11.0 min | 77.4% | 133 |
| SAN DEN San Diego International Airport – Denver International Airport | 1,371 | 22.6 min | 69.0% | 58 |
| SLC MDW Salt Lake City International Airport – Chicago Midway International Airport | 2,021 | 13.4 min | 74.5% | 51 |
| LAX MDW Los Angeles International Airport – Chicago Midway International Airport | 2,812 | 39.9 min | 23.8% | 42 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 32 | 32 | 81.3% | 0 |
| November 2024 | 29 | 29 | 89.7% | 0 |
| December 2024 | 31 | 31 | 74.2% | 0 |
| January 2025 | 28 | 28 | 85.7% | 0 |
| February 2025 | 26 | 26 | 73.1% | 0 |
| March 2025 | 5 | 5 | 80.0% | 0 |
| April 2025 | 23 | 23 | 60.9% | 0 |
| May 2025 | 33 | 33 | 66.7% | 0 |
| June 2025 | 26 | 26 | 65.4% | 0 |
| July 2025 | 26 | 26 | 88.5% | 0 |
| August 2025 | 10 | 10 | 40.0% | 0 |
| September 2025 | 8 | 8 | 75.0% | 0 |
| October 2025 | 14 | 14 | 100.0% | 0 |
| November 2025 | 1 | 1 | 0.0% | 0 |
| December 2025 | 1 | 1 | 0.0% | 0 |
| February 2026 | 1 | 1 | 100.0% | 0 |
| June 2026 | 39 | 39 | 53.9% | 0 |
| July 2026 | 45 | 45 | 46.7% | 0 |