WN1577
WN1577 (Southwest Airlines) is a multi-stop service on 41 routes, busiest Los Angeles to Las Vegas. Of 846 departures recorded from October 2024 to July 2026, 75.7% left on time, according to the US BTS.
- On-time departures75.7%of 846 flights
- Average delay12.7 min
- July 2026113▲ 264.5%vs July 2025
- Cancelled0.6%
- Legs flown under this number41
Recorded departures by month
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 | 33 | 15 | ▼ 54.5% |
| February | 26 | 19 | ▼ 26.9% |
| March | 30 | 29 | ▼ 3.3% |
| April | 39 | 30 | ▼ 23.1% |
| May | 45 | 32 | ▼ 28.9% |
| June | 31 | 103 | ▲ 232.3% |
| July | 31 | 113 | ▲ 264.5% |
| August | 30 | – | – |
| September | 30 | – | – |
| October | 27 | – | in progress |
| November | 51 | – | – |
| December | 28 | – | – |
| Year to date (Jan–Jul) | 235 | 341 | ▲ 45.1% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
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 | 84.4% | 93.3% | ▲ 10.6% |
| February | 88.5% | 94.7% | ▲ 7.1% |
| March | 83.3% | 51.7% | ▼ 37.9% |
| April | 79.0% | 93.3% | ▲ 18.2% |
| May | 62.2% | 80.7% | ▲ 29.6% |
| June | 83.9% | 49.5% | ▼ 41.0% |
| July | 90.0% | 67.9% | ▼ 24.6% |
| August | 80.0% | – | – |
| September | 73.3% | – | – |
| October | 74.1% | – | in progress |
| November | 88.2% | – | – |
| December | 82.1% | – | – |
| Year-to-date average (Jan–Jul) | 81.6% | 75.9% | ▼ 7.0% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 1 | 1 | 0.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 2 | ▼ 33.3% |
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 99.4% 841
- Cancelled 0.6% 5
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
11Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 44 | 44 | 84.1% | 0 |
| December 2024 | 40 | 40 | 82.5% | 0 |
| January 2025 | 33 | 32 | 84.4% | 1 |
| February 2025 | 26 | 26 | 88.5% | 0 |
| March 2025 | 30 | 30 | 83.3% | 0 |
| April 2025 | 39 | 38 | 79.0% | 1 |
| May 2025 | 45 | 45 | 62.2% | 0 |
| June 2025 | 31 | 31 | 83.9% | 0 |
| July 2025 | 31 | 30 | 90.0% | 1 |
| August 2025 | 30 | 30 | 80.0% | 0 |
| September 2025 | 30 | 30 | 73.3% | 0 |
| October 2025 | 27 | 27 | 74.1% | 0 |
| November 2025 | 51 | 51 | 88.2% | 0 |
| December 2025 | 28 | 28 | 82.1% | 0 |
| January 2026 | 15 | 15 | 93.3% | 0 |
| February 2026 | 19 | 19 | 94.7% | 0 |
| March 2026 | 29 | 29 | 51.7% | 0 |
| April 2026 | 30 | 30 | 93.3% | 0 |
| May 2026 | 32 | 31 | 80.7% | 1 |
| June 2026 | 103 | 103 | 49.5% | 0 |
| July 2026 | 113 | 112 | 67.9% | 1 |