WN1583
WN1583 (Southwest Airlines) is a multi-stop service on 27 routes, busiest Baltimore to St Louis. Of 626 departures recorded from October 2024 to July 2026, 75.7% left on time, according to the US BTS.
- On-time departures75.7%of 626 flights
- Average delay13.3 min
- July 202625▼ 19.4%vs July 2025
- Cancelled1.3%
- Legs flown under this number27
according to the US BTS · Oct 12, 2024 → Jul 29, 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 | 31 | ▲ 3.3% |
| February | 28 | 28 | 0.0% |
| March | 31 | 31 | 0.0% |
| April | 16 | 27 | ▲ 68.8% |
| May | 14 | 26 | ▲ 85.7% |
| June | 27 | 25 | ▼ 7.4% |
| July | 31 | 25 | ▼ 19.4% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 177 | 193 | ▲ 9.0% |
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 | 96.3% | 86.7% | ▼ 10.0% |
| February | 89.3% | 89.3% | 0.0% |
| March | 96.8% | 77.4% | ▼ 20.0% |
| April | 81.3% | 48.2% | ▼ 40.7% |
| May | 92.9% | 42.3% | ▼ 54.4% |
| June | 30.8% | 40.0% | ▲ 30.0% |
| July | 31.0% | 44.0% | ▲ 41.8% |
| August | 87.1% | – | – |
| September | 100.0% | – | – |
| October | 83.9% | – | in progress |
| November | 82.8% | – | – |
| December | 64.5% | – | – |
| Year-to-date average (Jan–Jul) | 74.0% | 61.1% | ▼ 17.4% |
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 | 3 | 1 | ▼ 66.7% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 2 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 6 | 1 | ▼ 83.3% |
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% 618
- Cancelled 1.3% 8
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 29, 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 |
|---|---|---|---|---|
| BWI STL Baltimore/Washington International Thurgood Marshall Airport – St. Louis Lambert International Airport | 1,185 | -0.2 min | 94.1% | 121 |
| BWI AUS Baltimore/Washington International Thurgood Marshall Airport – Austin Bergstrom International Airport | 2,156 | 54.7 min | 29.3% | 61 |
| ELP AUS El Paso International Airport – Austin Bergstrom International Airport | 849 | -1.5 min | 98.3% | 58 |
| BNA MKE Nashville International Airport – General Mitchell International Airport | 766 | 28.0 min | 46.0% | 50 |
| BNA MCO Nashville International Airport – Orlando International Airport | 993 | 4.7 min | 89.1% | 47 |
| BWI ALB Baltimore/Washington International Thurgood Marshall Airport – Albany International Airport | 464 | 8.5 min | 77.8% | 46 |
| BWI MDW Baltimore/Washington International Thurgood Marshall Airport – Chicago Midway International Airport | 981 | 21.4 min | 72.7% | 33 |
| BWI TPA Baltimore/Washington International Thurgood Marshall Airport – Tampa International Airport | 1,358 | 4.9 min | 83.9% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 36 | 36 | 91.7% | 0 |
| November 2024 | 32 | 32 | 100.0% | 0 |
| December 2024 | 35 | 35 | 91.4% | 0 |
| January 2025 | 30 | 27 | 96.3% | 3 |
| February 2025 | 28 | 28 | 89.3% | 0 |
| March 2025 | 31 | 31 | 96.8% | 0 |
| April 2025 | 16 | 16 | 81.3% | 0 |
| May 2025 | 14 | 14 | 92.9% | 0 |
| June 2025 | 27 | 26 | 30.8% | 1 |
| July 2025 | 31 | 29 | 31.0% | 2 |
| August 2025 | 31 | 31 | 87.1% | 0 |
| September 2025 | 30 | 30 | 100.0% | 0 |
| October 2025 | 31 | 31 | 83.9% | 0 |
| November 2025 | 30 | 29 | 82.8% | 1 |
| December 2025 | 31 | 31 | 64.5% | 0 |
| January 2026 | 31 | 30 | 86.7% | 1 |
| February 2026 | 28 | 28 | 89.3% | 0 |
| March 2026 | 31 | 31 | 77.4% | 0 |
| April 2026 | 27 | 27 | 48.2% | 0 |
| May 2026 | 26 | 26 | 42.3% | 0 |
| June 2026 | 25 | 25 | 40.0% | 0 |
| July 2026 | 25 | 25 | 44.0% | 0 |