WN4015
WN4015 (Southwest Airlines) is a multi-stop service on 27 routes, busiest Las Vegas to Santa Ana. Of 630 departures recorded from October 2024 to July 2026, 78.1% left on time, according to the US BTS.
- On-time departures78.1%of 630 flights
- Average delay12.8 min
- July 202629▲ 3.6%vs July 2025
- Cancelled1.3%
- Legs flown under this number27
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 88 | 5 | ▼ 94.3% |
| February | 86 | 5 | ▼ 94.2% |
| March | 14 | 43 | ▲ 207.1% |
| April | 6 | 37 | ▲ 516.7% |
| May | 9 | 35 | ▲ 288.9% |
| June | 23 | 23 | 0.0% |
| July | 28 | 29 | ▲ 3.6% |
| August | 22 | – | – |
| September | 21 | – | – |
| October | 32 | – | in progress |
| November | 26 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 254 | 177 | ▼ 30.3% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 89.8% | 100.0% | ▲ 11.4% |
| February | 89.2% | 100.0% | ▲ 12.2% |
| March | 78.6% | 34.2% | ▼ 56.5% |
| April | 100.0% | 78.4% | ▼ 21.6% |
| May | 100.0% | 97.1% | ▼ 2.9% |
| June | 82.6% | 34.8% | ▼ 57.9% |
| July | 89.3% | 53.6% | ▼ 40.0% |
| August | 85.7% | – | – |
| September | 90.5% | – | – |
| October | 65.6% | – | in progress |
| November | 61.5% | – | – |
| December | 72.4% | – | – |
| Year-to-date average (Jan–Jul) | 89.9% | 71.1% | ▼ 20.9% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 3 | 0 | ▼ 100.0% |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 4 | ▲ 33.3% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 98.7% 622
- Cancelled 1.3% 8
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
88 of 8
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| LAS SNA Harry Reid International Airport – John Wayne Orange County International Airport | 365 | 7.8 min | 84.0% | 101 |
| SNA SJC John Wayne Orange County International Airport – Mineta San Jose International Airport | 550 | 0.0 min | 93.0% | 59 |
| PDX LAS Portland International Airport – Harry Reid International Airport | 1,227 | 13.7 min | 69.5% | 59 |
| MCI STL Kansas City International Airport – St. Louis Lambert International Airport | 380 | 3.1 min | 96.5% | 57 |
| MSY MCO Louis Armstrong New Orleans International Airport – Orlando International Airport | 886 | 3.7 min | 86.5% | 52 |
| TPA DAL Tampa International Airport – Dallas Love Field | 1,474 | 37.1 min | 37.5% | 41 |
| STL SFO St. Louis Lambert International Airport – San Francisco International Airport | 2,786 | 5.9 min | 87.2% | 40 |
| MCO MDW Orlando International Airport – Chicago Midway International Airport | 1,595 | 43.7 min | 38.7% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 85.0% | 0 |
| November 2024 | 27 | 27 | 85.2% | 0 |
| December 2024 | 22 | 22 | 86.4% | 0 |
| January 2025 | 88 | 88 | 89.8% | 0 |
| February 2025 | 86 | 83 | 89.2% | 3 |
| March 2025 | 14 | 14 | 78.6% | 0 |
| April 2025 | 6 | 6 | 100.0% | 0 |
| May 2025 | 9 | 9 | 100.0% | 0 |
| June 2025 | 23 | 23 | 82.6% | 0 |
| July 2025 | 28 | 28 | 89.3% | 0 |
| August 2025 | 22 | 21 | 85.7% | 1 |
| September 2025 | 21 | 21 | 90.5% | 0 |
| October 2025 | 32 | 32 | 65.6% | 0 |
| November 2025 | 26 | 26 | 61.5% | 0 |
| December 2025 | 29 | 29 | 72.4% | 0 |
| January 2026 | 5 | 5 | 100.0% | 0 |
| February 2026 | 5 | 5 | 100.0% | 0 |
| March 2026 | 43 | 41 | 34.2% | 2 |
| April 2026 | 37 | 37 | 78.4% | 0 |
| May 2026 | 35 | 34 | 97.1% | 1 |
| June 2026 | 23 | 23 | 34.8% | 0 |
| July 2026 | 29 | 28 | 53.6% | 1 |