WN3661
WN3661 (Southwest Airlines) is a multi-stop service on 23 routes, busiest St Louis to Charlotte. Of 513 departures recorded from October 2024 to July 2026, 75.8% left on time, according to the US BTS.
- On-time departures75.8%of 513 flights
- Average delay11.8 min
- July 202622▲ 57.1%vs July 2025
- Cancelled1.0%
- Legs flown under this number23
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 | 8 | ▼ 68.0% |
| February | 17 | 15 | ▼ 11.8% |
| March | 15 | 28 | ▲ 86.7% |
| April | 15 | 49 | ▲ 226.7% |
| May | 15 | 52 | ▲ 246.7% |
| June | 13 | 27 | ▲ 107.7% |
| July | 14 | 22 | ▲ 57.1% |
| August | 15 | – | – |
| September | 16 | – | – |
| October | 38 | – | in progress |
| November | 27 | – | – |
| December | 22 | – | – |
| Year to date (Jan–Jul) | 114 | 201 | ▲ 76.3% |
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 | 87.0% | 87.5% | ▲ 0.6% |
| February | 82.4% | 86.7% | ▲ 5.2% |
| March | 71.4% | 96.4% | ▲ 35.0% |
| April | 66.7% | 75.5% | ▲ 13.3% |
| May | 66.7% | 65.4% | ▼ 1.9% |
| June | 69.2% | 85.2% | ▲ 23.1% |
| July | 42.9% | 95.5% | ▲ 122.7% |
| August | 66.7% | – | – |
| September | 68.8% | – | – |
| October | 76.3% | – | in progress |
| November | 92.0% | – | – |
| December | 90.9% | – | – |
| Year-to-date average (Jan–Jul) | 69.5% | 84.6% | ▲ 21.8% |
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 | 2 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 0 | ▼ 100.0% |
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 99.0% 508
- Cancelled 1.0% 5
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| STL CLT St. Louis Lambert International Airport – Charlotte Douglas International Airport | 924 | 10.8 min | 76.0% | 97 |
| IND DEN Indianapolis International Airport – Denver International Airport | 1,568 | -1.7 min | 97.7% | 46 |
| ONT OAK Ontario International Airport – Oakland San Francisco Bay Airport | 582 | 16.6 min | 57.1% | 42 |
| SJC BUR Mineta San Jose International Airport – Hollywood Burbank/Bob Hope Airport | 477 | 3.5 min | 88.2% | 34 |
| LBB DAL Lubbock Preston Smith International Airport – Dallas Love Field | 472 | 0.8 min | 93.8% | 32 |
| TPA SJU Tampa International Airport – Luis Munoz Marin International Airport | 1,991 | 9.2 min | 77.4% | 31 |
| MDW BWI Chicago Midway International Airport – Baltimore/Washington International Thurgood Marshall Airport | 981 | 14.6 min | 70.0% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 4 | 4 | 75.0% | 0 |
| November 2024 | 34 | 34 | 67.7% | 0 |
| December 2024 | 42 | 42 | 59.5% | 0 |
| January 2025 | 25 | 23 | 87.0% | 2 |
| February 2025 | 17 | 17 | 82.4% | 0 |
| March 2025 | 15 | 14 | 71.4% | 1 |
| April 2025 | 15 | 15 | 66.7% | 0 |
| May 2025 | 15 | 15 | 66.7% | 0 |
| June 2025 | 13 | 13 | 69.2% | 0 |
| July 2025 | 14 | 14 | 42.9% | 0 |
| August 2025 | 15 | 15 | 66.7% | 0 |
| September 2025 | 16 | 16 | 68.8% | 0 |
| October 2025 | 38 | 38 | 76.3% | 0 |
| November 2025 | 27 | 25 | 92.0% | 2 |
| December 2025 | 22 | 22 | 90.9% | 0 |
| January 2026 | 8 | 8 | 87.5% | 0 |
| February 2026 | 15 | 15 | 86.7% | 0 |
| March 2026 | 28 | 28 | 96.4% | 0 |
| April 2026 | 49 | 49 | 75.5% | 0 |
| May 2026 | 52 | 52 | 65.4% | 0 |
| June 2026 | 27 | 27 | 85.2% | 0 |
| July 2026 | 22 | 22 | 95.5% | 0 |