WN4931
WN4931 (Southwest Airlines) is a multi-stop service on 8 routes, busiest Las Vegas to Houston. Of 268 departures recorded from October 2024 to July 2026, 78.9% left on time, according to the US BTS.
- On-time departures78.9%of 268 flights
- Average delay8.5 min
- July 202627
- Cancelled3.0%
- Legs flown under this number8
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods10 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 25 | 35 | ▲ 40.0% |
| February | 24 | 47 | ▲ 95.8% |
| March | 26 | 6 | ▼ 76.9% |
| April | 6 | – | – |
| May | – | – | – |
| June | – | 23 | – |
| July | – | 27 | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 2 | – | – |
| December | – | – | – |
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 periods10 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 69.6% | 90.3% | ▲ 29.8% |
| February | 78.3% | 78.7% | ▲ 0.6% |
| March | 96.2% | 100.0% | ▲ 4.0% |
| April | 100.0% | – | – |
| May | – | – | – |
| June | – | 72.7% | – |
| July | – | 55.6% | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 50.0% | – | – |
| December | – | – | – |
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 periods10 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 4 | ▲ 100.0% |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 0 | – |
| April | 0 | – | – |
| May | – | – | – |
| June | – | 1 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 0 | – | – |
| December | – | – | – |
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 97.0% 260
- Cancelled 3.0% 8
Share of all recorded flights in the period, all legs. · Oct 14, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| LAS HOU Harry Reid International Airport – William P. Hobby Airport | 1,985 | 10.2 min | 76.4% | 92 |
| SDF TPA Louisville Muhammad Ali International Airport – Tampa International Airport | 1,172 | 4.1 min | 80.4% | 58 |
| SJC BUR Mineta San Jose International Airport – Hollywood Burbank/Bob Hope Airport | 477 | 18.5 min | 63.3% | 50 |
| MDW SDF Chicago Midway International Airport – Louisville Muhammad Ali International Airport | 437 | -1.8 min | 92.9% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 7 | 7 | 85.7% | 0 |
| November 2024 | 22 | 22 | 81.8% | 0 |
| December 2024 | 18 | 18 | 72.2% | 0 |
| January 2025 | 25 | 23 | 69.6% | 2 |
| February 2025 | 24 | 23 | 78.3% | 1 |
| March 2025 | 26 | 26 | 96.2% | 0 |
| April 2025 | 6 | 6 | 100.0% | 0 |
| November 2025 | 2 | 2 | 50.0% | 0 |
| January 2026 | 35 | 31 | 90.3% | 4 |
| February 2026 | 47 | 47 | 78.7% | 0 |
| March 2026 | 6 | 6 | 100.0% | 0 |
| June 2026 | 23 | 22 | 72.7% | 1 |
| July 2026 | 27 | 27 | 55.6% | 0 |