WN3958
WN3958 (Southwest Airlines) is a multi-stop service on 20 routes, busiest St Louis to New York. Of 461 departures recorded from October 2024 to July 2026, 73.0% left on time, according to the US BTS.
- On-time departures73.0%of 461 flights
- Average delay14.6 min
- July 202630▲ 42.9%vs July 2025
- Cancelled1.1%
- 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 periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 4 | 22 | ▲ 450.0% |
| February | – | 19 | – |
| March | 18 | 26 | ▲ 44.4% |
| April | 11 | 38 | ▲ 245.5% |
| May | 9 | 44 | ▲ 388.9% |
| June | 21 | 30 | ▲ 42.9% |
| July | 21 | 30 | ▲ 42.9% |
| August | 18 | – | – |
| September | 17 | – | – |
| October | 45 | – | in progress |
| November | 27 | – | – |
| December | 29 | – | – |
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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 100.0% | 59.1% | ▼ 40.9% |
| February | – | 68.4% | – |
| March | 76.5% | 75.0% | ▼ 1.9% |
| April | 45.5% | 63.2% | ▲ 39.0% |
| May | 77.8% | 65.9% | ▼ 15.3% |
| June | 100.0% | 86.7% | ▼ 13.3% |
| July | 95.2% | 93.3% | ▼ 2.0% |
| August | 94.4% | – | – |
| September | 100.0% | – | – |
| October | 80.0% | – | in progress |
| November | 37.0% | – | – |
| December | 50.0% | – | – |
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 periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | – | 0 | – |
| March | 1 | 2 | ▲ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
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 98.9% 456
- Cancelled 1.1% 5
Share of all recorded flights in the period, all legs. · Oct 31, 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 |
|---|---|---|---|---|
| STL LGA St. Louis Lambert International Airport – LaGuardia Airport | 1,426 | 43.6 min | 44.1% | 60 |
| PSP LAS Palm Springs International Airport – Harry Reid International Airport | 279 | 24.1 min | 56.1% | 57 |
| ELP LAS El Paso International Airport – Harry Reid International Airport | 938 | 2.2 min | 91.2% | 57 |
| MHT BWI Manchester-Boston Regional Airport – Baltimore/Washington International Thurgood Marshall Airport | 606 | -2.2 min | 97.8% | 45 |
| SAN LAS San Diego International Airport – Harry Reid International Airport | 417 | 15.9 min | 61.5% | 39 |
| SJC BOI Mineta San Jose International Airport – Boise Air Terminal/Gowen Field | 841 | -1.8 min | 96.8% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 1 | 1 | 100.0% | 0 |
| November 2024 | 17 | 17 | 58.8% | 0 |
| December 2024 | 14 | 14 | 57.1% | 0 |
| January 2025 | 4 | 3 | 100.0% | 1 |
| March 2025 | 18 | 17 | 76.5% | 1 |
| April 2025 | 11 | 11 | 45.5% | 0 |
| May 2025 | 9 | 9 | 77.8% | 0 |
| June 2025 | 21 | 21 | 100.0% | 0 |
| July 2025 | 21 | 21 | 95.2% | 0 |
| August 2025 | 18 | 18 | 94.4% | 0 |
| September 2025 | 17 | 17 | 100.0% | 0 |
| October 2025 | 45 | 45 | 80.0% | 0 |
| November 2025 | 27 | 27 | 37.0% | 0 |
| December 2025 | 29 | 28 | 50.0% | 1 |
| January 2026 | 22 | 22 | 59.1% | 0 |
| February 2026 | 19 | 19 | 68.4% | 0 |
| March 2026 | 26 | 24 | 75.0% | 2 |
| April 2026 | 38 | 38 | 63.2% | 0 |
| May 2026 | 44 | 44 | 65.9% | 0 |
| June 2026 | 30 | 30 | 86.7% | 0 |
| July 2026 | 30 | 30 | 93.3% | 0 |