WN4553
WN4553 (Southwest Airlines) is a multi-stop service on 17 routes, busiest Phoenix to Milwaukee. Of 293 departures recorded from October 2024 to July 2026, 81.4% left on time, according to the US BTS.
- On-time departures81.4%of 293 flights
- Average delay10.2 min
- July 202614
- Cancelled0.7%
- Legs flown under this number17
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 | 26 | 1 | ▼ 96.2% |
| February | 13 | – | – |
| March | 3 | 4 | ▲ 33.3% |
| April | 26 | 12 | ▼ 53.8% |
| May | 35 | 12 | ▼ 65.7% |
| June | 4 | 14 | ▲ 250.0% |
| July | – | 14 | – |
| August | 4 | – | – |
| September | 4 | – | – |
| October | 16 | – | in progress |
| November | 3 | – | – |
| December | 2 | – | – |
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 | 88.5% | 100.0% | ▲ 13.0% |
| February | 100.0% | – | – |
| March | 100.0% | 75.0% | ▼ 25.0% |
| April | 76.9% | 83.3% | ▲ 8.3% |
| May | 62.9% | 58.3% | ▼ 7.2% |
| June | 75.0% | 53.9% | ▼ 28.2% |
| July | – | 71.4% | – |
| August | 75.0% | – | – |
| September | 50.0% | – | – |
| October | 100.0% | – | in progress |
| November | 66.7% | – | – |
| December | 0.0% | – | – |
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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | – | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | – | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | 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 99.3% 291
- Cancelled 0.7% 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
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PHX MKE Phoenix Sky Harbor International Airport – General Mitchell International Airport | 2,346 | 0.6 min | 94.9% | 79 |
| AUS MDW Austin Bergstrom International Airport – Chicago Midway International Airport | 1,565 | 26.0 min | 64.9% | 57 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 52 | 52 | 92.3% | 0 |
| December 2024 | 28 | 28 | 89.3% | 0 |
| January 2025 | 26 | 26 | 88.5% | 0 |
| February 2025 | 13 | 13 | 100.0% | 0 |
| March 2025 | 3 | 3 | 100.0% | 0 |
| April 2025 | 26 | 26 | 76.9% | 0 |
| May 2025 | 35 | 35 | 62.9% | 0 |
| June 2025 | 4 | 4 | 75.0% | 0 |
| August 2025 | 4 | 4 | 75.0% | 0 |
| September 2025 | 4 | 4 | 50.0% | 0 |
| October 2025 | 16 | 15 | 100.0% | 1 |
| November 2025 | 3 | 3 | 66.7% | 0 |
| December 2025 | 2 | 2 | 0.0% | 0 |
| January 2026 | 1 | 1 | 100.0% | 0 |
| March 2026 | 4 | 4 | 75.0% | 0 |
| April 2026 | 12 | 12 | 83.3% | 0 |
| May 2026 | 12 | 12 | 58.3% | 0 |
| June 2026 | 14 | 13 | 53.9% | 1 |
| July 2026 | 14 | 14 | 71.4% | 0 |