WN576
WN576 (Southwest Airlines) is a multi-stop service on 36 routes, busiest Ontario to Las Vegas. Of 831 departures recorded from October 2024 to July 2026, 83.2% left on time, according to the US BTS.
- On-time departures83.2%of 831 flights
- Average delay9.0 min
- July 202640▲ 29.0%vs July 2025
- Cancelled0.6%
- Legs flown under this number36
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 | 30 | 30 | 0.0% |
| February | 28 | 52 | ▲ 85.7% |
| March | 31 | 34 | ▲ 9.7% |
| April | 30 | 78 | ▲ 160.0% |
| May | 32 | 91 | ▲ 184.4% |
| June | 30 | 43 | ▲ 43.3% |
| July | 31 | 40 | ▲ 29.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 53 | – | in progress |
| November | 26 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 212 | 368 | ▲ 73.6% |
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 | 100.0% | 63.3% | ▼ 36.7% |
| February | 96.4% | 76.0% | ▼ 21.2% |
| March | 96.8% | 72.7% | ▼ 24.8% |
| April | 100.0% | 75.6% | ▼ 24.4% |
| May | 81.3% | 74.7% | ▼ 8.0% |
| June | 83.3% | 83.7% | ▲ 0.5% |
| July | 90.3% | 72.5% | ▼ 19.7% |
| August | 93.6% | – | – |
| September | 100.0% | – | – |
| October | 92.3% | – | in progress |
| November | 80.8% | – | – |
| December | 58.6% | – | – |
| Year-to-date average (Jan–Jul) | 92.6% | 74.1% | ▼ 20.0% |
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 | 1 | 0 | ▼ 100.0% |
| February | 0 | 2 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 3 | ▲ 200.0% |
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 99.4% 826
- Cancelled 0.6% 5
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 |
|---|---|---|---|---|
| ONT LAS Ontario International Airport – Harry Reid International Airport | 317 | -1.4 min | 99.2% | 120 |
| MCI LAS Kansas City International Airport – Harry Reid International Airport | 1,829 | 0.3 min | 98.3% | 58 |
| LGA MCI LaGuardia Airport – Kansas City International Airport | 1,778 | 8.4 min | 84.5% | 58 |
| DEN SJC Denver International Airport – Mineta San Jose International Airport | 1,522 | 18.6 min | 65.5% | 58 |
| BOS MDW Boston Logan International Airport – Chicago Midway International Airport | 1,381 | 7.0 min | 89.7% | 58 |
| OAK PDX Oakland San Francisco Bay Airport – Portland International Airport | 876 | 15.5 min | 76.0% | 50 |
| PHL STL Philadelphia International Airport – St. Louis Lambert International Airport | 1,306 | 12.0 min | 90.7% | 43 |
| LAX LAS Los Angeles International Airport – Harry Reid International Airport | 380 | -2.3 min | 97.0% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 60.0% | 0 |
| November 2024 | 31 | 31 | 100.0% | 0 |
| December 2024 | 31 | 31 | 100.0% | 0 |
| January 2025 | 30 | 29 | 100.0% | 1 |
| February 2025 | 28 | 28 | 96.4% | 0 |
| March 2025 | 31 | 31 | 96.8% | 0 |
| April 2025 | 30 | 30 | 100.0% | 0 |
| May 2025 | 32 | 32 | 81.3% | 0 |
| June 2025 | 30 | 30 | 83.3% | 0 |
| July 2025 | 31 | 31 | 90.3% | 0 |
| August 2025 | 31 | 31 | 93.6% | 0 |
| September 2025 | 30 | 30 | 100.0% | 0 |
| October 2025 | 53 | 52 | 92.3% | 1 |
| November 2025 | 26 | 26 | 80.8% | 0 |
| December 2025 | 29 | 29 | 58.6% | 0 |
| January 2026 | 30 | 30 | 63.3% | 0 |
| February 2026 | 52 | 50 | 76.0% | 2 |
| March 2026 | 34 | 33 | 72.7% | 1 |
| April 2026 | 78 | 78 | 75.6% | 0 |
| May 2026 | 91 | 91 | 74.7% | 0 |
| June 2026 | 43 | 43 | 83.7% | 0 |
| July 2026 | 40 | 40 | 72.5% | 0 |