WN3803
WN3803 (Southwest Airlines) is a multi-stop service on 22 routes, busiest St Louis to Chicago. Of 302 departures recorded from February 2025 to July 2026, 75.0% left on time, according to the US BTS.
- On-time departures75.0%of 302 flights
- Average delay16.5 min
- July 202612▼ 60.0%vs July 2025
- Cancelled0.7%
- Legs flown under this number22
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 1 | – |
| February | 10 | – | – |
| March | 18 | 53 | ▲ 194.4% |
| April | 15 | 14 | ▼ 6.7% |
| May | 12 | 8 | ▼ 33.3% |
| June | 29 | 13 | ▼ 55.2% |
| July | 30 | 12 | ▼ 60.0% |
| August | 35 | – | – |
| September | 34 | – | – |
| October | 11 | – | in progress |
| November | 5 | – | – |
| December | 2 | – | – |
according to the US BTS · February 2025 → July 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 100.0% | – |
| February | 90.0% | – | – |
| March | 64.7% | 86.5% | ▲ 33.7% |
| April | 86.7% | 78.6% | ▼ 9.3% |
| May | 91.7% | 75.0% | ▼ 18.2% |
| June | 75.9% | 69.2% | ▼ 8.7% |
| July | 53.3% | 50.0% | ▼ 6.2% |
| August | 77.1% | – | – |
| September | 91.2% | – | – |
| October | 54.6% | – | in progress |
| November | 20.0% | – | – |
| December | 0.0% | – | – |
according to the US BTS · February 2025 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · February 2025 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 0 | – |
| February | 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 | – | – |
according to the US BTS · February 2025 → 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 99.3% 300
- Cancelled 0.7% 2
Share of all recorded flights in the period, all legs. · Feb 13, 2025 → Jul 29, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| STL MDW St. Louis Lambert International Airport – Chicago Midway International Airport | 404 | 23.6 min | 61.7% | 60 |
| SJC MDW Mineta San Jose International Airport – Chicago Midway International Airport | 2,950 | 5.8 min | 89.7% | 58 |
| MCO DAL Orlando International Airport – Dallas Love Field | 1,564 | 13.3 min | 78.4% | 53 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| February 2025 | 10 | 10 | 90.0% | 0 |
| March 2025 | 18 | 17 | 64.7% | 1 |
| April 2025 | 15 | 15 | 86.7% | 0 |
| May 2025 | 12 | 12 | 91.7% | 0 |
| June 2025 | 29 | 29 | 75.9% | 0 |
| July 2025 | 30 | 30 | 53.3% | 0 |
| August 2025 | 35 | 35 | 77.1% | 0 |
| September 2025 | 34 | 34 | 91.2% | 0 |
| October 2025 | 11 | 11 | 54.6% | 0 |
| November 2025 | 5 | 5 | 20.0% | 0 |
| December 2025 | 2 | 2 | 0.0% | 0 |
| January 2026 | 1 | 1 | 100.0% | 0 |
| March 2026 | 53 | 52 | 86.5% | 1 |
| April 2026 | 14 | 14 | 78.6% | 0 |
| May 2026 | 8 | 8 | 75.0% | 0 |
| June 2026 | 13 | 13 | 69.2% | 0 |
| July 2026 | 12 | 12 | 50.0% | 0 |