WN4175
WN4175 (Southwest Airlines) is a multi-stop service on 23 routes, busiest San Diego to San Francisco. Of 452 departures recorded from October 2024 to July 2026, 65.7% left on time, according to the US BTS.
- On-time departures65.7%of 452 flights
- Average delay19.8 min
- July 202627▲ 28.6%vs July 2025
- Cancelled0.7%
- Legs flown under this number23
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 18 | 29 | ▲ 61.1% |
| February | 29 | 35 | ▲ 20.7% |
| March | 26 | 5 | ▼ 80.8% |
| April | 6 | 18 | ▲ 200.0% |
| May | 1 | 21 | ▲ 2,000.0% |
| June | 20 | 26 | ▲ 30.0% |
| July | 21 | 27 | ▲ 28.6% |
| August | 4 | – | – |
| September | – | – | – |
| October | 24 | – | in progress |
| November | 18 | – | – |
| December | 15 | – | – |
| Year to date (Jan–Jul) | 121 | 161 | ▲ 33.1% |
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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 55.6% | 71.4% | ▲ 28.6% |
| February | 55.2% | 75.8% | ▲ 37.3% |
| March | 65.4% | 60.0% | ▼ 8.2% |
| April | 66.7% | 72.2% | ▲ 8.3% |
| May | 0.0% | 47.6% | – |
| June | 60.0% | 69.2% | ▲ 15.4% |
| July | 52.4% | 85.2% | ▲ 62.6% |
| August | 100.0% | – | – |
| September | – | – | – |
| October | 66.7% | – | in progress |
| November | 88.9% | – | – |
| December | 66.7% | – | – |
| Year-to-date average (Jan–Jul) | 50.7% | 68.8% | ▲ 35.6% |
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 periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 0 | 2 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 3 |
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 99.3% 449
- Cancelled 0.7% 3
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 |
|---|---|---|---|---|
| SAN SFO San Diego International Airport – San Francisco International Airport | 719 | 31.9 min | 49.3% | 67 |
| MCO BWI Orlando International Airport – Baltimore/Washington International Thurgood Marshall Airport | 1,269 | 8.2 min | 73.2% | 58 |
| DEN SNA Denver International Airport – John Wayne Orange County International Airport | 1,360 | 9.1 min | 80.0% | 50 |
| SAT STL San Antonio International Airport – St. Louis Lambert International Airport | 1,266 | 18.8 min | 57.1% | 42 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 16 | 16 | 68.8% | 0 |
| November 2024 | 63 | 63 | 63.5% | 0 |
| December 2024 | 30 | 30 | 53.3% | 0 |
| January 2025 | 18 | 18 | 55.6% | 0 |
| February 2025 | 29 | 29 | 55.2% | 0 |
| March 2025 | 26 | 26 | 65.4% | 0 |
| April 2025 | 6 | 6 | 66.7% | 0 |
| May 2025 | 1 | 1 | 0.0% | 0 |
| June 2025 | 20 | 20 | 60.0% | 0 |
| July 2025 | 21 | 21 | 52.4% | 0 |
| August 2025 | 4 | 4 | 100.0% | 0 |
| October 2025 | 24 | 24 | 66.7% | 0 |
| November 2025 | 18 | 18 | 88.9% | 0 |
| December 2025 | 15 | 15 | 66.7% | 0 |
| January 2026 | 29 | 28 | 71.4% | 1 |
| February 2026 | 35 | 33 | 75.8% | 2 |
| March 2026 | 5 | 5 | 60.0% | 0 |
| April 2026 | 18 | 18 | 72.2% | 0 |
| May 2026 | 21 | 21 | 47.6% | 0 |
| June 2026 | 26 | 26 | 69.2% | 0 |
| July 2026 | 27 | 27 | 85.2% | 0 |