WN4031
WN4031 (Southwest Airlines) is a multi-stop service on 16 routes, busiest Chicago to New York. Of 384 departures recorded from October 2024 to July 2026, 74.3% left on time, according to the US BTS.
- On-time departures74.3%of 384 flights
- Average delay14.7 min
- July 202618
- Cancelled2.6%
- Legs flown under this number16
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 | 27 | 30 | ▲ 11.1% |
| February | 26 | 42 | ▲ 61.5% |
| March | 5 | 37 | ▲ 640.0% |
| April | – | 18 | – |
| May | 1 | 13 | ▲ 1,200.0% |
| June | – | 18 | – |
| July | – | 18 | – |
| August | 11 | – | – |
| September | 13 | – | – |
| October | 5 | – | in progress |
| November | 34 | – | – |
| December | 22 | – | – |
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 | 88.9% | 83.3% | ▼ 6.3% |
| February | 76.9% | 66.7% | ▼ 13.3% |
| March | 80.0% | 47.2% | ▼ 41.0% |
| April | – | 77.8% | – |
| May | 100.0% | 53.9% | ▼ 46.2% |
| June | – | 100.0% | – |
| July | – | 94.4% | – |
| August | 72.7% | – | – |
| September | 84.6% | – | – |
| October | 60.0% | – | in progress |
| November | 50.0% | – | – |
| December | 68.2% | – | – |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | – | 0 | – |
| May | 0 | 0 | – |
| June | – | 0 | – |
| July | – | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 6 | – | – |
| 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 97.4% 374
- Cancelled 2.6% 10
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 |
|---|---|---|---|---|
| MDW LGA Chicago Midway International Airport – LaGuardia Airport | 1,164 | 7.1 min | 86.7% | 93 |
| LAS SAN Harry Reid International Airport – San Diego International Airport | 417 | 18.3 min | 70.0% | 50 |
| PHX DAL Phoenix Sky Harbor International Airport – Dallas Love Field | 1,412 | 17.0 min | 69.2% | 42 |
| SAN PHX San Diego International Airport – Phoenix Sky Harbor International Airport | 489 | 16.8 min | 65.8% | 41 |
| TPA MDW Tampa International Airport – Chicago Midway International Airport | 1,607 | 0.4 min | 97.1% | 34 |
| MSP BWI Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field – Baltimore/Washington International Thurgood Marshall Airport | 1,504 | 21.9 min | 53.1% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 13 | 13 | 92.3% | 0 |
| November 2024 | 25 | 24 | 87.5% | 1 |
| December 2024 | 26 | 24 | 79.2% | 2 |
| January 2025 | 27 | 27 | 88.9% | 0 |
| February 2025 | 26 | 26 | 76.9% | 0 |
| March 2025 | 5 | 5 | 80.0% | 0 |
| May 2025 | 1 | 1 | 100.0% | 0 |
| August 2025 | 11 | 11 | 72.7% | 0 |
| September 2025 | 13 | 13 | 84.6% | 0 |
| October 2025 | 5 | 5 | 60.0% | 0 |
| November 2025 | 34 | 28 | 50.0% | 6 |
| December 2025 | 22 | 22 | 68.2% | 0 |
| January 2026 | 30 | 30 | 83.3% | 0 |
| February 2026 | 42 | 42 | 66.7% | 0 |
| March 2026 | 37 | 36 | 47.2% | 1 |
| April 2026 | 18 | 18 | 77.8% | 0 |
| May 2026 | 13 | 13 | 53.9% | 0 |
| June 2026 | 18 | 18 | 100.0% | 0 |
| July 2026 | 18 | 18 | 94.4% | 0 |