WN4050
WN4050 (Southwest Airlines) is a multi-stop service on 17 routes, busiest Salt Lake City to Chicago. Of 334 departures recorded from October 2024 to July 2026, 77.3% left on time, according to the US BTS.
- On-time departures77.3%of 334 flights
- Average delay10.8 min
- July 202616
- Cancelled0.0%
- Legs flown under this number17
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 32 | – |
| February | 8 | 36 | ▲ 350.0% |
| March | 1 | 32 | ▲ 3,100.0% |
| April | 12 | 27 | ▲ 125.0% |
| May | 18 | 26 | ▲ 44.4% |
| June | 2 | 18 | ▲ 800.0% |
| July | – | 16 | – |
| August | 19 | – | – |
| September | 22 | – | – |
| October | 31 | – | in progress |
| November | 14 | – | – |
| December | 1 | – | – |
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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 93.8% | – |
| February | 37.5% | 97.2% | ▲ 159.3% |
| March | 100.0% | 96.9% | ▼ 3.1% |
| April | 75.0% | 40.7% | ▼ 45.7% |
| May | 72.2% | 57.7% | ▼ 20.1% |
| June | 50.0% | 50.0% | 0.0% |
| July | – | 50.0% | – |
| August | 73.7% | – | – |
| September | 77.3% | – | – |
| October | 96.8% | – | 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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | 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 100.0% 334
- Cancelled 0.0% 0
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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SLC MDW Salt Lake City International Airport – Chicago Midway International Airport | 2,021 | -1.7 min | 98.1% | 53 |
| SAN AUS San Diego International Airport – Austin Bergstrom International Airport | 1,871 | 23.1 min | 44.9% | 49 |
| PHX LAX Phoenix Sky Harbor International Airport – Los Angeles International Airport | 595 | 10.5 min | 76.2% | 42 |
| MSY TPA Louis Armstrong New Orleans International Airport – Tampa International Airport | 785 | -2.9 min | 97.0% | 33 |
| LAS IND Harry Reid International Airport – Indianapolis International Airport | 2,553 | 19.6 min | 71.0% | 31 |
| OGG HNL Kahului International Airport – Daniel K. Inouye International Airport | 162 | -1.9 min | 96.7% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 88.2% | 0 |
| November 2024 | 1 | 1 | 100.0% | 0 |
| December 2024 | 1 | 1 | 0.0% | 0 |
| February 2025 | 8 | 8 | 37.5% | 0 |
| March 2025 | 1 | 1 | 100.0% | 0 |
| April 2025 | 12 | 12 | 75.0% | 0 |
| May 2025 | 18 | 18 | 72.2% | 0 |
| June 2025 | 2 | 2 | 50.0% | 0 |
| August 2025 | 19 | 19 | 73.7% | 0 |
| September 2025 | 22 | 22 | 77.3% | 0 |
| October 2025 | 31 | 31 | 96.8% | 0 |
| November 2025 | 14 | 14 | 100.0% | 0 |
| December 2025 | 1 | 1 | 100.0% | 0 |
| January 2026 | 32 | 32 | 93.8% | 0 |
| February 2026 | 36 | 36 | 97.2% | 0 |
| March 2026 | 32 | 32 | 96.9% | 0 |
| April 2026 | 27 | 27 | 40.7% | 0 |
| May 2026 | 26 | 26 | 57.7% | 0 |
| June 2026 | 18 | 18 | 50.0% | 0 |
| July 2026 | 16 | 16 | 50.0% | 0 |