WN4124
WN4124 (Southwest Airlines) is a multi-stop service on 19 routes, busiest Phoenix to San Francisco. Of 375 departures recorded from October 2024 to July 2026, 59.5% left on time, according to the US BTS.
- On-time departures59.5%of 375 flights
- Average delay21.5 min
- July 202617▲ 30.8%vs July 2025
- Cancelled0.5%
- Legs flown under this number19
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 | 1 | 5 | ▲ 400.0% |
| February | 2 | 5 | ▲ 150.0% |
| March | 23 | – | – |
| April | 37 | 26 | ▼ 29.7% |
| May | 39 | 31 | ▼ 20.5% |
| June | 18 | 19 | ▲ 5.6% |
| July | 13 | 17 | ▲ 30.8% |
| August | 5 | – | – |
| September | 4 | – | – |
| October | 43 | – | in progress |
| November | 29 | – | – |
| 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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 0.0% | 0.0% | – |
| February | 50.0% | 40.0% | ▼ 20.0% |
| March | 82.6% | – | – |
| April | 83.8% | 38.5% | ▼ 54.1% |
| May | 75.7% | 25.8% | ▼ 65.9% |
| June | 66.7% | 26.3% | ▼ 60.5% |
| July | 84.6% | 29.4% | ▼ 65.2% |
| August | 80.0% | – | – |
| September | 100.0% | – | – |
| October | 67.4% | – | in progress |
| November | 62.1% | – | – |
| December | 41.9% | – | – |
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 periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | – | – |
| April | 0 | 0 | – |
| May | 2 | 0 | ▼ 100.0% |
| 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 99.5% 373
- Cancelled 0.5% 2
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PHX SFO Phoenix Sky Harbor International Airport – San Francisco International Airport | 1,047 | 43.2 min | 46.9% | 64 |
| TPA SAN Tampa International Airport – San Diego International Airport | 3,352 | 26.1 min | 29.3% | 58 |
| BNA LAX Nashville International Airport – Los Angeles International Airport | 2,886 | 13.6 min | 77.2% | 58 |
| BNA SMF Nashville International Airport – Sacramento International Airport | 3,078 | 36.9 min | 27.3% | 33 |
| PDX DEN Portland International Airport – Denver International Airport | 1,592 | 17.1 min | 64.5% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 4 | 4 | 75.0% | 0 |
| December 2024 | 3 | 3 | 33.3% | 0 |
| January 2025 | 1 | 1 | 0.0% | 0 |
| February 2025 | 2 | 2 | 50.0% | 0 |
| March 2025 | 23 | 23 | 82.6% | 0 |
| April 2025 | 37 | 37 | 83.8% | 0 |
| May 2025 | 39 | 37 | 75.7% | 2 |
| June 2025 | 18 | 18 | 66.7% | 0 |
| July 2025 | 13 | 13 | 84.6% | 0 |
| August 2025 | 5 | 5 | 80.0% | 0 |
| September 2025 | 4 | 4 | 100.0% | 0 |
| October 2025 | 43 | 43 | 67.4% | 0 |
| November 2025 | 29 | 29 | 62.1% | 0 |
| December 2025 | 31 | 31 | 41.9% | 0 |
| January 2026 | 5 | 5 | 0.0% | 0 |
| February 2026 | 5 | 5 | 40.0% | 0 |
| April 2026 | 26 | 26 | 38.5% | 0 |
| May 2026 | 31 | 31 | 25.8% | 0 |
| June 2026 | 19 | 19 | 26.3% | 0 |
| July 2026 | 17 | 17 | 29.4% | 0 |