WN4529
WN4529 (Southwest Airlines) is a multi-stop service on 20 routes, busiest Phoenix to St Louis. Of 420 departures recorded from October 2024 to July 2026, 71.5% left on time, according to the US BTS.
- On-time departures71.5%of 420 flights
- Average delay16.7 min
- July 202614▼ 48.1%vs July 2025
- Cancelled0.5%
- Legs flown under this number20
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 | 28 | – | – |
| February | 40 | 28 | ▼ 30.0% |
| March | 22 | 30 | ▲ 36.4% |
| April | 16 | 27 | ▲ 68.8% |
| May | 19 | 26 | ▲ 36.8% |
| June | 24 | 15 | ▼ 37.5% |
| July | 27 | 14 | ▼ 48.1% |
| August | 14 | – | – |
| September | 13 | – | – |
| October | – | – | in progress |
| November | 1 | – | – |
| December | – | – | – |
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 | 71.4% | – | – |
| February | 70.0% | 70.4% | ▲ 0.5% |
| March | 81.8% | 65.5% | ▼ 19.9% |
| April | 75.0% | 77.8% | ▲ 3.7% |
| May | 68.4% | 53.9% | ▼ 21.3% |
| June | 79.2% | 80.0% | ▲ 1.0% |
| July | 59.3% | 85.7% | ▲ 44.6% |
| August | 85.7% | – | – |
| September | 23.1% | – | – |
| October | – | – | in progress |
| November | 100.0% | – | – |
| December | – | – | – |
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 | 0 | – | – |
| February | 0 | 1 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | – | – | in progress |
| November | 0 | – | – |
| December | – | – | – |
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% 418
- 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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PHX STL Phoenix Sky Harbor International Airport – St. Louis Lambert International Airport | 2,026 | 12.2 min | 70.0% | 80 |
| SJU MCO Luis Munoz Marin International Airport – Orlando International Airport | 1,913 | 24.5 min | 69.2% | 52 |
| TPA ATL Tampa International Airport – Hartsfield Jackson Atlanta International Airport | 655 | 21.3 min | 66.0% | 50 |
| SNA PHX John Wayne Orange County International Airport – Phoenix Sky Harbor International Airport | 544 | 0.4 min | 89.2% | 37 |
| SRQ IND Sarasota Bradenton International Airport – Indianapolis International Airport | 1,413 | 27.0 min | 68.8% | 33 |
| ELP PHX El Paso International Airport – Phoenix Sky Harbor International Airport | 557 | 13.0 min | 71.9% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 22 | 22 | 72.7% | 0 |
| November 2024 | 26 | 26 | 80.8% | 0 |
| December 2024 | 28 | 28 | 82.1% | 0 |
| January 2025 | 28 | 28 | 71.4% | 0 |
| February 2025 | 40 | 40 | 70.0% | 0 |
| March 2025 | 22 | 22 | 81.8% | 0 |
| April 2025 | 16 | 16 | 75.0% | 0 |
| May 2025 | 19 | 19 | 68.4% | 0 |
| June 2025 | 24 | 24 | 79.2% | 0 |
| July 2025 | 27 | 27 | 59.3% | 0 |
| August 2025 | 14 | 14 | 85.7% | 0 |
| September 2025 | 13 | 13 | 23.1% | 0 |
| November 2025 | 1 | 1 | 100.0% | 0 |
| February 2026 | 28 | 27 | 70.4% | 1 |
| March 2026 | 30 | 29 | 65.5% | 1 |
| April 2026 | 27 | 27 | 77.8% | 0 |
| May 2026 | 26 | 26 | 53.9% | 0 |
| June 2026 | 15 | 15 | 80.0% | 0 |
| July 2026 | 14 | 14 | 85.7% | 0 |