WN1578
WN1578 (Southwest Airlines) is a multi-stop service on 26 routes, busiest St Louis to Fort Myers. Of 627 departures recorded from October 2024 to July 2026, 77.9% left on time, according to the US BTS.
- On-time departures77.9%of 627 flights
- Average delay10.2 min
- July 202612▼ 61.3%vs July 2025
- Cancelled0.6%
- Legs flown under this number26
according to the US BTS · Oct 12, 2024 → Jul 26, 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 | 14 | 36 | ▲ 157.1% |
| February | 17 | 36 | ▲ 111.8% |
| March | 29 | 32 | ▲ 10.3% |
| April | 30 | 40 | ▲ 33.3% |
| May | 30 | 44 | ▲ 46.7% |
| June | 30 | 16 | ▼ 46.7% |
| July | 31 | 12 | ▼ 61.3% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 18 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 181 | 216 | ▲ 19.3% |
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 | 42.9% | 88.6% | ▲ 106.6% |
| February | 64.7% | 88.9% | ▲ 37.4% |
| March | 86.2% | 90.3% | ▲ 4.8% |
| April | 85.7% | 80.0% | ▼ 6.7% |
| May | 66.7% | 84.1% | ▲ 26.1% |
| June | 70.0% | 87.5% | ▲ 25.0% |
| July | 51.6% | 91.7% | ▲ 77.6% |
| August | 90.3% | – | – |
| September | 93.3% | – | – |
| October | 72.2% | – | in progress |
| November | 72.4% | – | – |
| December | 74.2% | – | – |
| Year-to-date average (Jan–Jul) | 66.8% | 87.3% | ▲ 30.6% |
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 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 2 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 2 | 0.0% |
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% 623
- Cancelled 0.6% 4
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 26, 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 |
|---|---|---|---|---|
| STL RSW St. Louis Lambert International Airport – Southwest Florida International Airport | 1,578 | 23.9 min | 57.4% | 61 |
| STL TPA St. Louis Lambert International Airport – Tampa International Airport | 1,400 | 19.4 min | 73.3% | 60 |
| SAN ELP San Diego International Airport – El Paso International Airport | 1,022 | 2.6 min | 87.9% | 58 |
| PDX PHX Portland International Airport – Phoenix Sky Harbor International Airport | 1,625 | 1.8 min | 96.6% | 58 |
| BUR SJC Hollywood Burbank/Bob Hope Airport – Mineta San Jose International Airport | 477 | -2.8 min | 96.0% | 50 |
| LAS PDX Harry Reid International Airport – Portland International Airport | 1,227 | 21.4 min | 61.7% | 47 |
| HNL OGG Daniel K. Inouye International Airport – Kahului International Airport | 162 | -4.0 min | 96.9% | 33 |
| BNA LAS Nashville International Airport – Harry Reid International Airport | 2,549 | 5.6 min | 84.9% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 94.7% | 0 |
| November 2024 | 25 | 25 | 64.0% | 0 |
| December 2024 | 47 | 47 | 63.8% | 0 |
| January 2025 | 14 | 14 | 42.9% | 0 |
| February 2025 | 17 | 17 | 64.7% | 0 |
| March 2025 | 29 | 29 | 86.2% | 0 |
| April 2025 | 30 | 28 | 85.7% | 2 |
| May 2025 | 30 | 30 | 66.7% | 0 |
| June 2025 | 30 | 30 | 70.0% | 0 |
| July 2025 | 31 | 31 | 51.6% | 0 |
| August 2025 | 31 | 31 | 90.3% | 0 |
| September 2025 | 30 | 30 | 93.3% | 0 |
| October 2025 | 18 | 18 | 72.2% | 0 |
| November 2025 | 29 | 29 | 72.4% | 0 |
| December 2025 | 31 | 31 | 74.2% | 0 |
| January 2026 | 36 | 35 | 88.6% | 1 |
| February 2026 | 36 | 36 | 88.9% | 0 |
| March 2026 | 32 | 31 | 90.3% | 1 |
| April 2026 | 40 | 40 | 80.0% | 0 |
| May 2026 | 44 | 44 | 84.1% | 0 |
| June 2026 | 16 | 16 | 87.5% | 0 |
| July 2026 | 12 | 12 | 91.7% | 0 |