WN3631
WN3631 (Southwest Airlines) is a multi-stop service on 23 routes, busiest Kansas City to Houston. Of 416 departures recorded from October 2024 to July 2026, 70.1% left on time, according to the US BTS.
- On-time departures70.1%of 416 flights
- Average delay16.8 min
- July 20264▼ 88.9%vs July 2025
- Cancelled1.2%
- Legs flown under this number23
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 | 15 | 3 | ▼ 80.0% |
| February | 11 | 7 | ▼ 36.4% |
| March | 28 | 21 | ▼ 25.0% |
| April | 7 | 30 | ▲ 328.6% |
| May | – | 30 | – |
| June | 30 | 7 | ▼ 76.7% |
| July | 36 | 4 | ▼ 88.9% |
| August | 32 | – | – |
| September | 30 | – | – |
| October | 57 | – | in progress |
| November | 5 | – | – |
| December | 11 | – | – |
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 | 53.3% | 66.7% | ▲ 25.0% |
| February | 81.8% | 85.7% | ▲ 4.8% |
| March | 89.3% | 76.2% | ▼ 14.7% |
| April | 85.7% | 90.0% | ▲ 5.0% |
| May | – | 80.0% | – |
| June | 57.7% | 28.6% | ▼ 50.5% |
| July | 72.2% | 50.0% | ▼ 30.8% |
| August | 65.6% | – | – |
| September | 83.3% | – | – |
| October | 64.9% | – | in progress |
| November | 60.0% | – | – |
| December | 27.3% | – | – |
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 | – |
| June | 4 | 0 | ▼ 100.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 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 98.8% 411
- Cancelled 1.2% 5
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 26, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| MCI HOU Kansas City International Airport – William P. Hobby Airport | 1,075 | 18.3 min | 75.0% | 60 |
| MCO SJU Orlando International Airport – Luis Munoz Marin International Airport | 1,913 | 10.0 min | 75.9% | 58 |
| MDW SAV Chicago Midway International Airport – Savannah Hilton Head International Airport | 1,221 | 7.2 min | 82.5% | 57 |
| OGG HNL Kahului International Airport – Daniel K. Inouye International Airport | 162 | 0.9 min | 87.9% | 33 |
| BWI PVD Baltimore/Washington International Thurgood Marshall Airport – Rhode Island T. F. Green International Airport | 526 | 21.4 min | 56.7% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 3 | 3 | 100.0% | 0 |
| November 2024 | 15 | 15 | 66.7% | 0 |
| December 2024 | 34 | 33 | 54.6% | 1 |
| January 2025 | 15 | 15 | 53.3% | 0 |
| February 2025 | 11 | 11 | 81.8% | 0 |
| March 2025 | 28 | 28 | 89.3% | 0 |
| April 2025 | 7 | 7 | 85.7% | 0 |
| June 2025 | 30 | 26 | 57.7% | 4 |
| July 2025 | 36 | 36 | 72.2% | 0 |
| August 2025 | 32 | 32 | 65.6% | 0 |
| September 2025 | 30 | 30 | 83.3% | 0 |
| October 2025 | 57 | 57 | 64.9% | 0 |
| November 2025 | 5 | 5 | 60.0% | 0 |
| December 2025 | 11 | 11 | 27.3% | 0 |
| January 2026 | 3 | 3 | 66.7% | 0 |
| February 2026 | 7 | 7 | 85.7% | 0 |
| March 2026 | 21 | 21 | 76.2% | 0 |
| April 2026 | 30 | 30 | 90.0% | 0 |
| May 2026 | 30 | 30 | 80.0% | 0 |
| June 2026 | 7 | 7 | 28.6% | 0 |
| July 2026 | 4 | 4 | 50.0% | 0 |