WN4256
WN4256 (Southwest Airlines) is a multi-stop service on 21 routes, busiest Colorado Springs to Phoenix. Of 314 departures recorded from October 2024 to July 2026, 78.6% left on time, according to the US BTS.
- On-time departures78.6%of 314 flights
- Average delay10.2 min
- July 202630▼ 3.2%vs July 2025
- Cancelled0.3%
- Legs flown under this number21
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 | 9 | 3 | ▼ 66.7% |
| February | 9 | 10 | ▲ 11.1% |
| March | 2 | 1 | ▼ 50.0% |
| April | – | 21 | – |
| May | – | 25 | – |
| June | 26 | 30 | ▲ 15.4% |
| July | 31 | 30 | ▼ 3.2% |
| August | 14 | – | – |
| September | 12 | – | – |
| October | 22 | – | in progress |
| November | 3 | – | – |
| December | 17 | – | – |
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 | 100.0% | 100.0% | 0.0% |
| February | 100.0% | 70.0% | ▼ 30.0% |
| March | 50.0% | 0.0% | ▼ 100.0% |
| April | – | 76.2% | – |
| May | – | 56.0% | – |
| June | 84.6% | 83.3% | ▼ 1.5% |
| July | 56.7% | 100.0% | ▲ 76.5% |
| August | 42.9% | – | – |
| September | 75.0% | – | – |
| October | 77.3% | – | in progress |
| November | 100.0% | – | – |
| December | 94.1% | – | – |
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 | – |
| May | – | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| 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 99.7% 313
- Cancelled 0.3% 1
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 |
|---|---|---|---|---|
| COS PHX City of Colorado Springs Municipal Airport – Phoenix Sky Harbor International Airport | 887 | 0.5 min | 94.7% | 57 |
| MSP DEN Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field – Denver International Airport | 1,092 | 15.0 min | 63.3% | 49 |
| PHX OAK Phoenix Sky Harbor International Airport – Oakland San Francisco Bay Airport | 1,039 | 8.4 min | 78.6% | 43 |
| LAX PHX Los Angeles International Airport – Phoenix Sky Harbor International Airport | 595 | -3.2 min | 97.4% | 38 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 15 | 15 | 86.7% | 0 |
| November 2024 | 12 | 12 | 75.0% | 0 |
| December 2024 | 22 | 22 | 90.9% | 0 |
| January 2025 | 9 | 9 | 100.0% | 0 |
| February 2025 | 9 | 9 | 100.0% | 0 |
| March 2025 | 2 | 2 | 50.0% | 0 |
| June 2025 | 26 | 26 | 84.6% | 0 |
| July 2025 | 31 | 30 | 56.7% | 1 |
| August 2025 | 14 | 14 | 42.9% | 0 |
| September 2025 | 12 | 12 | 75.0% | 0 |
| October 2025 | 22 | 22 | 77.3% | 0 |
| November 2025 | 3 | 3 | 100.0% | 0 |
| December 2025 | 17 | 17 | 94.1% | 0 |
| January 2026 | 3 | 3 | 100.0% | 0 |
| February 2026 | 10 | 10 | 70.0% | 0 |
| March 2026 | 1 | 1 | 0.0% | 0 |
| April 2026 | 21 | 21 | 76.2% | 0 |
| May 2026 | 25 | 25 | 56.0% | 0 |
| June 2026 | 30 | 30 | 83.3% | 0 |
| July 2026 | 30 | 30 | 100.0% | 0 |