WN4952
WN4952 (Southwest Airlines) is a multi-stop service on 13 routes, busiest Philadelphia to St Louis. Of 131 departures recorded from October 2024 to July 2026, 78.6% left on time, according to the US BTS.
- On-time departures78.6%of 131 flights
- Average delay11.0 min
- July 202613
- Cancelled0.0%
- Legs flown under this number13
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods11 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | – | – |
| February | – | 30 | – |
| March | – | 5 | – |
| April | 3 | 16 | ▲ 433.3% |
| May | 3 | 22 | ▲ 633.3% |
| June | 1 | 12 | ▲ 1,100.0% |
| July | – | 13 | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 2 | – | – |
| 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 periods11 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 0.0% | – | – |
| February | – | 90.0% | – |
| March | – | 80.0% | – |
| April | 100.0% | 100.0% | 0.0% |
| May | 66.7% | 86.4% | ▲ 29.5% |
| June | 100.0% | 50.0% | ▼ 50.0% |
| July | – | 61.5% | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 0.0% | – | – |
| 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 periods11 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | – | – |
| February | – | 0 | – |
| March | – | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| 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 100.0% 131
- Cancelled 0.0% 0
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 29, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PHL STL Philadelphia International Airport – St. Louis Lambert International Airport | 1,306 | 3.8 min | 89.7% | 39 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 3 | 3 | 100.0% | 0 |
| November 2024 | 13 | 13 | 69.2% | 0 |
| December 2024 | 7 | 7 | 71.4% | 0 |
| January 2025 | 1 | 1 | 0.0% | 0 |
| April 2025 | 3 | 3 | 100.0% | 0 |
| May 2025 | 3 | 3 | 66.7% | 0 |
| June 2025 | 1 | 1 | 100.0% | 0 |
| November 2025 | 2 | 2 | 0.0% | 0 |
| February 2026 | 30 | 30 | 90.0% | 0 |
| March 2026 | 5 | 5 | 80.0% | 0 |
| April 2026 | 16 | 16 | 100.0% | 0 |
| May 2026 | 22 | 22 | 86.4% | 0 |
| June 2026 | 12 | 12 | 50.0% | 0 |
| July 2026 | 13 | 13 | 61.5% | 0 |