WN4066
WN4066 (Southwest Airlines) is a multi-stop service on 15 routes, busiest Phoenix to Chicago. Of 264 departures recorded from October 2024 to July 2026, 75.2% left on time, according to the US BTS.
- On-time departures75.2%of 264 flights
- Average delay11.3 min
- July 202630▲ 650.0%vs July 2025
- Cancelled0.8%
- Legs flown under this number15
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods16 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 3 | 2 | ▼ 33.3% |
| February | 10 | 2 | ▼ 80.0% |
| March | 42 | – | – |
| April | 17 | – | – |
| May | 9 | 1 | ▼ 88.9% |
| June | 5 | 27 | ▲ 440.0% |
| July | 4 | 30 | ▲ 650.0% |
| August | 1 | – | – |
| September | – | – | – |
| October | 30 | – | in progress |
| November | 25 | – | – |
| December | 20 | – | – |
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 periods16 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 100.0% | 100.0% | 0.0% |
| February | 80.0% | 50.0% | ▼ 37.5% |
| March | 85.7% | – | – |
| April | 76.5% | – | – |
| May | 33.3% | 100.0% | ▲ 200.0% |
| June | 20.0% | 51.9% | ▲ 159.3% |
| July | 75.0% | 63.3% | ▼ 15.6% |
| August | 100.0% | – | – |
| September | – | – | – |
| October | 90.0% | – | in progress |
| November | 70.8% | – | – |
| December | 75.0% | – | – |
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 periods16 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | – | – |
| April | 0 | – | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| 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 99.2% 262
- Cancelled 0.8% 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
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PHX MDW Phoenix Sky Harbor International Airport – Chicago Midway International Airport | 2,319 | 20.6 min | 57.9% | 57 |
| PHX DAL Phoenix Sky Harbor International Airport – Dallas Love Field | 1,412 | 7.6 min | 73.3% | 46 |
| OKC STL OKC Will Rogers World Airport – St. Louis Lambert International Airport | 742 | -0.0 min | 90.3% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 9 | 9 | 100.0% | 0 |
| November 2024 | 11 | 11 | 100.0% | 0 |
| December 2024 | 16 | 16 | 87.5% | 0 |
| January 2025 | 3 | 2 | 100.0% | 1 |
| February 2025 | 10 | 10 | 80.0% | 0 |
| March 2025 | 42 | 42 | 85.7% | 0 |
| April 2025 | 17 | 17 | 76.5% | 0 |
| May 2025 | 9 | 9 | 33.3% | 0 |
| June 2025 | 5 | 5 | 20.0% | 0 |
| July 2025 | 4 | 4 | 75.0% | 0 |
| August 2025 | 1 | 1 | 100.0% | 0 |
| October 2025 | 30 | 30 | 90.0% | 0 |
| November 2025 | 25 | 24 | 70.8% | 1 |
| December 2025 | 20 | 20 | 75.0% | 0 |
| January 2026 | 2 | 2 | 100.0% | 0 |
| February 2026 | 2 | 2 | 50.0% | 0 |
| May 2026 | 1 | 1 | 100.0% | 0 |
| June 2026 | 27 | 27 | 51.9% | 0 |
| July 2026 | 30 | 30 | 63.3% | 0 |