WN3907
WN3907 (Southwest Airlines) is a multi-stop service on 18 routes, busiest St Louis to Washington. Of 315 departures recorded from October 2024 to July 2026, 61.7% left on time, according to the US BTS.
- On-time departures61.7%of 315 flights
- Average delay22.3 min
- July 202630▲ 42.9%vs July 2025
- Cancelled0.6%
- Legs flown under this number18
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 3 | ▲ 50.0% |
| February | 10 | 3 | ▼ 70.0% |
| March | 6 | 41 | ▲ 583.3% |
| April | 27 | 11 | ▼ 59.3% |
| May | 36 | 5 | ▼ 86.1% |
| June | 24 | 27 | ▲ 12.5% |
| July | 21 | 30 | ▲ 42.9% |
| August | 4 | – | – |
| September | – | – | – |
| October | 4 | – | in progress |
| November | 15 | – | – |
| December | 13 | – | – |
| Year to date (Jan–Jul) | 126 | 120 | ▼ 4.8% |
according to the US BTS · October 2024 → 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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 100.0% | 0.0% | ▼ 100.0% |
| February | 90.0% | 66.7% | ▼ 25.9% |
| March | 100.0% | 61.0% | ▼ 39.0% |
| April | 66.7% | 90.9% | ▲ 36.4% |
| May | 50.0% | 60.0% | ▲ 20.0% |
| June | 79.2% | 50.0% | ▼ 36.8% |
| July | 57.1% | 41.4% | ▼ 27.6% |
| August | 75.0% | – | – |
| September | – | – | – |
| October | 50.0% | – | in progress |
| November | 46.7% | – | – |
| December | 46.2% | – | – |
| Year-to-date average (Jan–Jul) | 77.6% | 52.8% | ▼ 31.9% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 2 |
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 99.4% 313
- Cancelled 0.6% 2
Share of all recorded flights in the period, all legs. · Oct 14, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| STL DCA St. Louis Lambert International Airport – Ronald Reagan Washington National Airport | 1,154 | 36.5 min | 45.5% | 57 |
| DEN BUF Denver International Airport – Buffalo Niagara International Airport | 2,182 | 31.2 min | 58.0% | 50 |
| MDW RNO Chicago Midway International Airport – Reno Tahoe International Airport | 2,698 | 18.3 min | 68.9% | 45 |
| AUS STL Austin Bergstrom International Airport – St. Louis Lambert International Airport | 1,161 | 24.9 min | 60.6% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 21 | 21 | 76.2% | 0 |
| November 2024 | 4 | 4 | 75.0% | 0 |
| December 2024 | 8 | 8 | 87.5% | 0 |
| January 2025 | 2 | 2 | 100.0% | 0 |
| February 2025 | 10 | 10 | 90.0% | 0 |
| March 2025 | 6 | 6 | 100.0% | 0 |
| April 2025 | 27 | 27 | 66.7% | 0 |
| May 2025 | 36 | 36 | 50.0% | 0 |
| June 2025 | 24 | 24 | 79.2% | 0 |
| July 2025 | 21 | 21 | 57.1% | 0 |
| August 2025 | 4 | 4 | 75.0% | 0 |
| October 2025 | 4 | 4 | 50.0% | 0 |
| November 2025 | 15 | 15 | 46.7% | 0 |
| December 2025 | 13 | 13 | 46.2% | 0 |
| January 2026 | 3 | 3 | 0.0% | 0 |
| February 2026 | 3 | 3 | 66.7% | 0 |
| March 2026 | 41 | 41 | 61.0% | 0 |
| April 2026 | 11 | 11 | 90.9% | 0 |
| May 2026 | 5 | 5 | 60.0% | 0 |
| June 2026 | 27 | 26 | 50.0% | 1 |
| July 2026 | 30 | 29 | 41.4% | 1 |