WN4188
WN4188 (Southwest Airlines) is a multi-stop service on 17 routes, busiest Las Vegas to Chicago. Of 379 departures recorded from October 2024 to July 2026, 82.2% left on time, according to the US BTS.
- On-time departures82.2%of 379 flights
- Average delay8.9 min
- July 202618
- Cancelled0.5%
- 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 | 25 | 3 | ▼ 88.0% |
| February | 26 | 12 | ▼ 53.8% |
| March | 25 | 25 | 0.0% |
| April | 34 | 30 | ▼ 11.8% |
| May | 40 | 30 | ▼ 25.0% |
| June | 5 | 26 | ▲ 420.0% |
| July | – | 18 | – |
| August | 4 | – | – |
| September | 4 | – | – |
| October | – | – | in progress |
| November | 5 | – | – |
| December | 11 | – | – |
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 | 60.0% | 100.0% | ▲ 66.7% |
| February | 73.1% | 91.7% | ▲ 25.4% |
| March | 84.0% | 80.0% | ▼ 4.8% |
| April | 76.5% | 100.0% | ▲ 30.8% |
| May | 59.0% | 96.7% | ▲ 63.9% |
| June | 60.0% | 84.0% | ▲ 40.0% |
| July | – | 94.4% | – |
| August | 100.0% | – | – |
| September | 75.0% | – | – |
| 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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 1 | – |
| July | – | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| 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 99.5% 377
- Cancelled 0.5% 2
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| LAS MDW Harry Reid International Airport – Chicago Midway International Airport | 2,442 | 12.2 min | 75.5% | 94 |
| SDF MCO Louisville Muhammad Ali International Airport – Orlando International Airport | 1,158 | 0.1 min | 98.3% | 57 |
| FLL DAL Fort Lauderdale Hollywood International Airport – Dallas Love Field | 1,780 | 11.2 min | 72.9% | 49 |
| MCI DAL Kansas City International Airport – Dallas Love Field | 743 | 4.0 min | 87.5% | 41 |
| PHX BNA Phoenix Sky Harbor International Airport – Nashville International Airport | 2,326 | 5.7 min | 83.3% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 16 | 16 | 93.8% | 0 |
| November 2024 | 16 | 16 | 87.5% | 0 |
| December 2024 | 24 | 24 | 83.3% | 0 |
| January 2025 | 25 | 25 | 60.0% | 0 |
| February 2025 | 26 | 26 | 73.1% | 0 |
| March 2025 | 25 | 25 | 84.0% | 0 |
| April 2025 | 34 | 34 | 76.5% | 0 |
| May 2025 | 40 | 39 | 59.0% | 1 |
| June 2025 | 5 | 5 | 60.0% | 0 |
| August 2025 | 4 | 4 | 100.0% | 0 |
| September 2025 | 4 | 4 | 75.0% | 0 |
| November 2025 | 5 | 5 | 100.0% | 0 |
| December 2025 | 11 | 11 | 100.0% | 0 |
| January 2026 | 3 | 3 | 100.0% | 0 |
| February 2026 | 12 | 12 | 91.7% | 0 |
| March 2026 | 25 | 25 | 80.0% | 0 |
| April 2026 | 30 | 30 | 100.0% | 0 |
| May 2026 | 30 | 30 | 96.7% | 0 |
| June 2026 | 26 | 25 | 84.0% | 1 |
| July 2026 | 18 | 18 | 94.4% | 0 |