WN1542
WN1542 (Southwest Airlines) is a multi-stop service on 35 routes, busiest Washington to Chicago. Of 732 departures recorded from October 2024 to July 2026, 76.5% left on time, according to the US BTS.
- On-time departures76.5%of 732 flights
- Average delay14.5 min
- July 202628▼ 31.7%vs July 2025
- Cancelled0.4%
- Legs flown under this number35
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 | 25 | 25 | 0.0% |
| February | 19 | 20 | ▲ 5.3% |
| March | 41 | 30 | ▼ 26.8% |
| April | 30 | 38 | ▲ 26.7% |
| May | 26 | 40 | ▲ 53.8% |
| June | 36 | 24 | ▼ 33.3% |
| July | 41 | 28 | ▼ 31.7% |
| August | 30 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 218 | 205 | ▼ 6.0% |
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 | 70.8% | 96.0% | ▲ 35.5% |
| February | 73.7% | 75.0% | ▲ 1.8% |
| March | 92.5% | 72.4% | ▼ 21.7% |
| April | 96.7% | 97.4% | ▲ 0.7% |
| May | 84.6% | 77.5% | ▼ 8.4% |
| June | 38.9% | 62.5% | ▲ 60.7% |
| July | 41.5% | 39.3% | ▼ 5.2% |
| August | 93.3% | – | – |
| September | 96.7% | – | – |
| October | 87.1% | – | in progress |
| November | 82.8% | – | – |
| December | 69.0% | – | – |
| Year-to-date average (Jan–Jul) | 71.2% | 74.3% | ▲ 4.3% |
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 | 1 | 1 | 0.0% |
| April | 0 | 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 | 1 | ▼ 50.0% |
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 99.6% 729
- Cancelled 0.4% 3
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 29, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
8| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DCA MDW Ronald Reagan Washington National Airport – Chicago Midway International Airport | 964 | 4.0 min | 92.6% | 81 |
| MDW BDL Chicago Midway International Airport – Bradley International Airport | 1,246 | 41.9 min | 42.6% | 61 |
| OAK BUR Oakland San Francisco Bay Airport – Hollywood Burbank/Bob Hope Airport | 523 | 9.2 min | 76.3% | 59 |
| MDW SAT Chicago Midway International Airport – San Antonio International Airport | 1,668 | 13.1 min | 73.7% | 58 |
| SJC DAL Mineta San Jose International Airport – Dallas Love Field | 2,329 | 6.9 min | 86.0% | 50 |
| DAL LAS Dallas Love Field – Harry Reid International Airport | 1,714 | 5.2 min | 89.8% | 49 |
| MDW STL Chicago Midway International Airport – St. Louis Lambert International Airport | 404 | -3.6 min | 97.0% | 33 |
| MCI DEN Kansas City International Airport – Denver International Airport | 855 | 24.6 min | 78.1% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 11 | 11 | 72.7% | 0 |
| November 2024 | 71 | 71 | 81.7% | 0 |
| December 2024 | 78 | 78 | 76.9% | 0 |
| January 2025 | 25 | 24 | 70.8% | 1 |
| February 2025 | 19 | 19 | 73.7% | 0 |
| March 2025 | 41 | 40 | 92.5% | 1 |
| April 2025 | 30 | 30 | 96.7% | 0 |
| May 2025 | 26 | 26 | 84.6% | 0 |
| June 2025 | 36 | 36 | 38.9% | 0 |
| July 2025 | 41 | 41 | 41.5% | 0 |
| August 2025 | 30 | 30 | 93.3% | 0 |
| September 2025 | 30 | 30 | 96.7% | 0 |
| October 2025 | 31 | 31 | 87.1% | 0 |
| November 2025 | 29 | 29 | 82.8% | 0 |
| December 2025 | 29 | 29 | 69.0% | 0 |
| January 2026 | 25 | 25 | 96.0% | 0 |
| February 2026 | 20 | 20 | 75.0% | 0 |
| March 2026 | 30 | 29 | 72.4% | 1 |
| April 2026 | 38 | 38 | 97.4% | 0 |
| May 2026 | 40 | 40 | 77.5% | 0 |
| June 2026 | 24 | 24 | 62.5% | 0 |
| July 2026 | 28 | 28 | 39.3% | 0 |