WN4235
WN4235 (Southwest Airlines) is a multi-stop service on 14 routes, busiest El Paso to Phoenix. Of 365 departures recorded from October 2024 to July 2026, 65.4% left on time, according to the US BTS.
- On-time departures65.4%of 365 flights
- Average delay19.2 min
- July 202614▼ 36.4%vs July 2025
- Cancelled1.9%
- Legs flown under this number14
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 | 28 | 4 | ▼ 85.7% |
| February | 28 | 7 | ▼ 75.0% |
| March | 5 | 16 | ▲ 220.0% |
| April | 23 | 4 | ▼ 82.6% |
| May | 29 | – | – |
| June | 23 | 12 | ▼ 47.8% |
| July | 22 | 14 | ▼ 36.4% |
| August | 29 | – | – |
| September | 30 | – | – |
| October | 1 | – | in progress |
| November | 25 | – | – |
| December | 26 | – | – |
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 | 100.0% | 100.0% | 0.0% |
| February | 100.0% | 83.3% | ▼ 16.7% |
| March | 100.0% | 68.8% | ▼ 31.3% |
| April | 65.2% | 75.0% | ▲ 15.0% |
| May | 39.3% | – | – |
| June | 60.9% | 0.0% | ▼ 100.0% |
| July | 54.6% | 0.0% | ▼ 100.0% |
| August | 58.6% | – | – |
| September | 50.0% | – | – |
| October | 100.0% | – | in progress |
| November | 61.9% | – | – |
| December | 65.4% | – | – |
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 | 1 | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | 1 | – | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 4 | – | – |
| 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 98.1% 358
- Cancelled 1.9% 7
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 |
|---|---|---|---|---|
| ELP PHX El Paso International Airport – Phoenix Sky Harbor International Airport | 557 | -4.7 min | 100.0% | 85 |
| SAT DEN San Antonio International Airport – Denver International Airport | 1,280 | 25.2 min | 53.5% | 58 |
| BNA LGA Nashville International Airport – LaGuardia Airport | 1,228 | 30.8 min | 51.0% | 50 |
| PHX LAS Phoenix Sky Harbor International Airport – Harry Reid International Airport | 411 | 25.6 min | 59.5% | 42 |
| SAN OAK San Diego International Airport – Oakland San Francisco Bay Airport | 718 | 25.4 min | 55.6% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 3 | 3 | 100.0% | 0 |
| November 2024 | 13 | 13 | 100.0% | 0 |
| December 2024 | 23 | 23 | 87.0% | 0 |
| January 2025 | 28 | 28 | 100.0% | 0 |
| February 2025 | 28 | 28 | 100.0% | 0 |
| March 2025 | 5 | 4 | 100.0% | 1 |
| April 2025 | 23 | 23 | 65.2% | 0 |
| May 2025 | 29 | 28 | 39.3% | 1 |
| June 2025 | 23 | 23 | 60.9% | 0 |
| July 2025 | 22 | 22 | 54.6% | 0 |
| August 2025 | 29 | 29 | 58.6% | 0 |
| September 2025 | 30 | 30 | 50.0% | 0 |
| October 2025 | 1 | 1 | 100.0% | 0 |
| November 2025 | 25 | 21 | 61.9% | 4 |
| December 2025 | 26 | 26 | 65.4% | 0 |
| January 2026 | 4 | 4 | 100.0% | 0 |
| February 2026 | 7 | 6 | 83.3% | 1 |
| March 2026 | 16 | 16 | 68.8% | 0 |
| April 2026 | 4 | 4 | 75.0% | 0 |
| June 2026 | 12 | 12 | 0.0% | 0 |
| July 2026 | 14 | 14 | 0.0% | 0 |