WN4394
WN4394 (Southwest Airlines) is a multi-stop service on 17 routes, busiest Ontario to Las Vegas. Of 325 departures recorded from October 2024 to July 2026, 74.1% left on time, according to the US BTS.
- On-time departures74.1%of 325 flights
- Average delay14.0 min
- July 202648▲ 1,100.0%vs July 2025
- Cancelled0.3%
- 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 | 3 | 25 | ▲ 733.3% |
| February | – | 27 | – |
| March | 12 | 27 | ▲ 125.0% |
| April | 26 | 8 | ▼ 69.2% |
| May | 11 | 4 | ▼ 63.6% |
| June | 6 | 43 | ▲ 616.7% |
| July | 4 | 48 | ▲ 1,100.0% |
| August | 1 | – | – |
| September | – | – | – |
| October | 26 | – | in progress |
| November | 6 | – | – |
| 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 | 50.0% | 88.0% | ▲ 76.0% |
| February | – | 88.9% | – |
| March | 83.3% | 85.2% | ▲ 2.2% |
| April | 61.5% | 87.5% | ▲ 42.2% |
| May | 100.0% | 50.0% | ▼ 50.0% |
| June | 100.0% | 53.5% | ▼ 46.5% |
| July | 100.0% | 75.0% | ▼ 25.0% |
| August | 0.0% | – | – |
| September | – | – | – |
| October | 19.2% | – | in progress |
| November | 100.0% | – | – |
| December | 72.7% | – | – |
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 | 1 | 0 | ▼ 100.0% |
| February | – | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| 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 99.7% 324
- Cancelled 0.3% 1
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ONT LAS Ontario International Airport – Harry Reid International Airport | 317 | 10.6 min | 86.8% | 53 |
| DAL DEN Dallas Love Field – Denver International Airport | 1,048 | 17.1 min | 67.4% | 49 |
| TPA BWI Tampa International Airport – Baltimore/Washington International Thurgood Marshall Airport | 1,358 | 11.3 min | 80.6% | 36 |
| ATL DAL Hartsfield Jackson Atlanta International Airport – Dallas Love Field | 1,158 | 13.9 min | 73.5% | 34 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 9 | 9 | 100.0% | 0 |
| November 2024 | 16 | 16 | 93.8% | 0 |
| December 2024 | 12 | 12 | 100.0% | 0 |
| January 2025 | 3 | 2 | 50.0% | 1 |
| March 2025 | 12 | 12 | 83.3% | 0 |
| April 2025 | 26 | 26 | 61.5% | 0 |
| May 2025 | 11 | 11 | 100.0% | 0 |
| June 2025 | 6 | 6 | 100.0% | 0 |
| July 2025 | 4 | 4 | 100.0% | 0 |
| August 2025 | 1 | 1 | 0.0% | 0 |
| October 2025 | 26 | 26 | 19.2% | 0 |
| November 2025 | 6 | 6 | 100.0% | 0 |
| December 2025 | 11 | 11 | 72.7% | 0 |
| January 2026 | 25 | 25 | 88.0% | 0 |
| February 2026 | 27 | 27 | 88.9% | 0 |
| March 2026 | 27 | 27 | 85.2% | 0 |
| April 2026 | 8 | 8 | 87.5% | 0 |
| May 2026 | 4 | 4 | 50.0% | 0 |
| June 2026 | 43 | 43 | 53.5% | 0 |
| July 2026 | 48 | 48 | 75.0% | 0 |