WN3721
WN3721 (Southwest Airlines) is a multi-stop service on 19 routes, busiest Denver to Kansas City. Of 424 departures recorded from October 2024 to July 2026, 84.7% left on time, according to the US BTS.
- On-time departures84.7%of 424 flights
- Average delay7.4 min
- July 202630▲ 2,900.0%vs July 2025
- Cancelled1.4%
- Legs flown under this number19
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 | 7 | 5 | ▼ 28.6% |
| February | 9 | 10 | ▲ 11.1% |
| March | 28 | 21 | ▼ 25.0% |
| April | 30 | 32 | ▲ 6.7% |
| May | 31 | 34 | ▲ 9.7% |
| June | 4 | 29 | ▲ 625.0% |
| July | 1 | 30 | ▲ 2,900.0% |
| August | 30 | – | – |
| September | 34 | – | – |
| October | 5 | – | in progress |
| November | 27 | – | – |
| December | 35 | – | – |
| Year to date (Jan–Jul) | 110 | 161 | ▲ 46.4% |
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 | 100.0% | 100.0% | 0.0% |
| February | 88.9% | 80.0% | ▼ 10.0% |
| March | 100.0% | 84.2% | ▼ 15.8% |
| April | 73.3% | 78.1% | ▲ 6.5% |
| May | 71.0% | 75.8% | ▲ 6.7% |
| June | 75.0% | 100.0% | ▲ 33.3% |
| July | 100.0% | 90.0% | ▼ 10.0% |
| August | 75.9% | – | – |
| September | 88.2% | – | – |
| October | 100.0% | – | in progress |
| November | 96.3% | – | – |
| December | 82.9% | – | – |
| Year-to-date average (Jan–Jul) | 86.9% | 86.9% | 0.0% |
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 | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 3 |
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 98.6% 418
- Cancelled 1.4% 6
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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN MCI Denver International Airport – Kansas City International Airport | 855 | 20.0 min | 69.0% | 58 |
| SJU MCO Luis Munoz Marin International Airport – Orlando International Airport | 1,913 | 3.5 min | 94.6% | 56 |
| STL MDW St. Louis Lambert International Airport – Chicago Midway International Airport | 404 | -1.6 min | 96.3% | 54 |
| MDW MHT Chicago Midway International Airport – Manchester-Boston Regional Airport | 1,345 | 8.1 min | 79.6% | 50 |
| DCA TPA Ronald Reagan Washington National Airport – Tampa International Airport | 1,312 | 7.6 min | 86.0% | 50 |
| ITO HNL Hilo International Airport – Daniel K. Inouye International Airport | 349 | -4.4 min | 100.0% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 11 | 9 | 100.0% | 2 |
| November 2024 | 3 | 3 | 100.0% | 0 |
| December 2024 | 8 | 8 | 50.0% | 0 |
| January 2025 | 7 | 7 | 100.0% | 0 |
| February 2025 | 9 | 9 | 88.9% | 0 |
| March 2025 | 28 | 28 | 100.0% | 0 |
| April 2025 | 30 | 30 | 73.3% | 0 |
| May 2025 | 31 | 31 | 71.0% | 0 |
| June 2025 | 4 | 4 | 75.0% | 0 |
| July 2025 | 1 | 1 | 100.0% | 0 |
| August 2025 | 30 | 29 | 75.9% | 1 |
| September 2025 | 34 | 34 | 88.2% | 0 |
| October 2025 | 5 | 5 | 100.0% | 0 |
| November 2025 | 27 | 27 | 96.3% | 0 |
| December 2025 | 35 | 35 | 82.9% | 0 |
| January 2026 | 5 | 5 | 100.0% | 0 |
| February 2026 | 10 | 10 | 80.0% | 0 |
| March 2026 | 21 | 19 | 84.2% | 2 |
| April 2026 | 32 | 32 | 78.1% | 0 |
| May 2026 | 34 | 33 | 75.8% | 1 |
| June 2026 | 29 | 29 | 100.0% | 0 |
| July 2026 | 30 | 30 | 90.0% | 0 |