WN1253
WN1253 (Southwest Airlines) is a multi-stop service on 30 routes, busiest St Louis to Chicago. Of 711 departures recorded from October 2024 to July 2026, 78.1% left on time, according to the US BTS.
- On-time departures78.1%of 711 flights
- Average delay12.6 min
- July 202622▼ 29.0%vs July 2025
- Cancelled1.0%
- Legs flown under this number30
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 | 31 | 43 | ▲ 38.7% |
| February | 28 | 36 | ▲ 28.6% |
| March | 25 | 20 | ▼ 20.0% |
| April | 25 | 27 | ▲ 8.0% |
| May | 27 | 31 | ▲ 14.8% |
| June | 29 | 23 | ▼ 20.7% |
| July | 31 | 22 | ▼ 29.0% |
| August | 42 | – | – |
| September | 42 | – | – |
| October | 35 | – | in progress |
| November | 51 | – | – |
| December | 64 | – | – |
| Year to date (Jan–Jul) | 196 | 202 | ▲ 3.1% |
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 | 86.2% | 78.1% | ▼ 9.5% |
| February | 82.1% | 69.4% | ▼ 15.5% |
| March | 72.0% | 70.0% | ▼ 2.8% |
| April | 88.0% | 88.9% | ▲ 1.0% |
| May | 92.6% | 87.1% | ▼ 5.9% |
| June | 55.2% | 77.3% | ▲ 40.1% |
| July | 56.7% | 68.2% | ▲ 20.3% |
| August | 81.0% | – | – |
| September | 73.8% | – | – |
| October | 74.3% | – | in progress |
| November | 96.0% | – | – |
| December | 67.2% | – | – |
| Year-to-date average (Jan–Jul) | 76.1% | 77.0% | ▲ 1.2% |
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 | 2 | 2 | 0.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 3 | 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 99.0% 704
- Cancelled 1.0% 7
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
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| STL MDW St. Louis Lambert International Airport – Chicago Midway International Airport | 404 | 6.4 min | 82.2% | 121 |
| FLL BNA Fort Lauderdale Hollywood International Airport – Nashville International Airport | 1,278 | 28.5 min | 55.0% | 61 |
| DEN SMF Denver International Airport – Sacramento International Airport | 1,460 | 16.7 min | 70.7% | 58 |
| DAL PHL Dallas Love Field – Philadelphia International Airport | 2,080 | 7.4 min | 89.7% | 58 |
| SMF BWI Sacramento International Airport – Baltimore/Washington International Thurgood Marshall Airport | 3,845 | 0.6 min | 96.0% | 50 |
| STL DAL St. Louis Lambert International Airport – Dallas Love Field | 878 | 15.7 min | 82.9% | 42 |
| IND BWI Indianapolis International Airport – Baltimore/Washington International Thurgood Marshall Airport | 828 | -2.9 min | 100.0% | 42 |
| DAL ABQ Dallas Love Field – Albuquerque International Sunport | 933 | 14.4 min | 66.7% | 34 |
| HOU ECP William P. Hobby Airport – Northwest Florida Beaches International Airport | 916 | 9.4 min | 76.7% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 29 | 29 | 82.8% | 0 |
| December 2024 | 30 | 30 | 86.7% | 0 |
| January 2025 | 31 | 29 | 86.2% | 2 |
| February 2025 | 28 | 28 | 82.1% | 0 |
| March 2025 | 25 | 25 | 72.0% | 0 |
| April 2025 | 25 | 25 | 88.0% | 0 |
| May 2025 | 27 | 27 | 92.6% | 0 |
| June 2025 | 29 | 29 | 55.2% | 0 |
| July 2025 | 31 | 30 | 56.7% | 1 |
| August 2025 | 42 | 42 | 81.0% | 0 |
| September 2025 | 42 | 42 | 73.8% | 0 |
| October 2025 | 35 | 35 | 74.3% | 0 |
| November 2025 | 51 | 50 | 96.0% | 1 |
| December 2025 | 64 | 64 | 67.2% | 0 |
| January 2026 | 43 | 41 | 78.1% | 2 |
| February 2026 | 36 | 36 | 69.4% | 0 |
| March 2026 | 20 | 20 | 70.0% | 0 |
| April 2026 | 27 | 27 | 88.9% | 0 |
| May 2026 | 31 | 31 | 87.1% | 0 |
| June 2026 | 23 | 22 | 77.3% | 1 |
| July 2026 | 22 | 22 | 68.2% | 0 |