WN4161
WN4161 (Southwest Airlines) is a multi-stop service on 16 routes, busiest St Louis to New York. Of 400 departures recorded from October 2024 to July 2026, 82.1% left on time, according to the US BTS.
- On-time departures82.1%of 400 flights
- Average delay8.6 min
- July 202616▼ 48.4%vs July 2025
- Cancelled1.0%
- 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 | 11 | 8 | ▼ 27.3% |
| February | 9 | 15 | ▲ 66.7% |
| March | 16 | 28 | ▲ 75.0% |
| April | 42 | 6 | ▼ 85.7% |
| May | 52 | – | – |
| June | 33 | 15 | ▼ 54.5% |
| July | 31 | 16 | ▼ 48.4% |
| August | 4 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 26 | – | – |
| 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% | 87.5% | ▼ 1.6% |
| February | 77.8% | 80.0% | ▲ 2.9% |
| March | 81.3% | 88.9% | ▲ 9.4% |
| April | 64.3% | 100.0% | ▲ 55.5% |
| May | 75.0% | – | – |
| June | 100.0% | 60.0% | ▼ 40.0% |
| July | 93.3% | 68.8% | ▼ 26.3% |
| August | 75.0% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 100.0% | – | – |
| December | 100.0% | – | – |
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 periods16 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | – | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | – | – | – |
| October | – | – | 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 99.0% 396
- Cancelled 1.0% 4
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 29, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
8| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| STL LGA St. Louis Lambert International Airport – LaGuardia Airport | 1,426 | 9.3 min | 75.7% | 72 |
| ORF MDW Norfolk International Airport – Chicago Midway International Airport | 1,131 | 3.5 min | 95.1% | 62 |
| OAK RNO Oakland San Francisco Bay Airport – Reno Tahoe International Airport | 291 | 9.9 min | 71.4% | 49 |
| MCI STL Kansas City International Airport – St. Louis Lambert International Airport | 380 | -2.4 min | 100.0% | 46 |
| AUS LAS Austin Bergstrom International Airport – Harry Reid International Airport | 1,752 | 12.6 min | 78.8% | 33 |
| PDX MDW Portland International Airport – Chicago Midway International Airport | 2,811 | 2.6 min | 93.6% | 32 |
| BUR OAK Hollywood Burbank/Bob Hope Airport – Oakland San Francisco Bay Airport | 523 | 19.8 min | 68.8% | 32 |
| LAS SLC Harry Reid International Airport – Salt Lake City International Airport | 592 | 18.2 min | 64.5% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 12 | 12 | 83.3% | 0 |
| November 2024 | 26 | 26 | 76.9% | 0 |
| December 2024 | 28 | 28 | 71.4% | 0 |
| January 2025 | 11 | 9 | 88.9% | 2 |
| February 2025 | 9 | 9 | 77.8% | 0 |
| March 2025 | 16 | 16 | 81.3% | 0 |
| April 2025 | 42 | 42 | 64.3% | 0 |
| May 2025 | 52 | 52 | 75.0% | 0 |
| June 2025 | 33 | 33 | 100.0% | 0 |
| July 2025 | 31 | 30 | 93.3% | 1 |
| August 2025 | 4 | 4 | 75.0% | 0 |
| November 2025 | 26 | 26 | 100.0% | 0 |
| December 2025 | 22 | 22 | 100.0% | 0 |
| January 2026 | 8 | 8 | 87.5% | 0 |
| February 2026 | 15 | 15 | 80.0% | 0 |
| March 2026 | 28 | 27 | 88.9% | 1 |
| April 2026 | 6 | 6 | 100.0% | 0 |
| June 2026 | 15 | 15 | 60.0% | 0 |
| July 2026 | 16 | 16 | 68.8% | 0 |