WN3478
WN3478 (Southwest Airlines) is a multi-stop service on 22 routes, busiest Kansas City to Denver. Of 479 departures recorded from October 2024 to July 2026, 76.6% left on time, according to the US BTS.
- On-time departures76.6%of 479 flights
- Average delay11.4 min
- July 202633▼ 13.2%vs July 2025
- Cancelled0.8%
- 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 periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 14 | 31 | ▲ 121.4% |
| February | 24 | 28 | ▲ 16.7% |
| March | 29 | 31 | ▲ 6.9% |
| April | 24 | 6 | ▼ 75.0% |
| May | 22 | – | – |
| June | 37 | 31 | ▼ 16.2% |
| July | 38 | 33 | ▼ 13.2% |
| August | 12 | – | – |
| September | 8 | – | – |
| October | 4 | – | in progress |
| November | 36 | – | – |
| December | 43 | – | – |
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 | 57.1% | 86.7% | ▲ 51.7% |
| February | 70.8% | 96.3% | ▲ 36.0% |
| March | 75.9% | 83.9% | ▲ 10.6% |
| April | 95.8% | 100.0% | ▲ 4.4% |
| May | 72.7% | – | – |
| June | 51.4% | 77.4% | ▲ 50.8% |
| July | 47.4% | 90.6% | ▲ 91.3% |
| August | 58.3% | – | – |
| September | 75.0% | – | – |
| October | 0.0% | – | in progress |
| November | 80.6% | – | – |
| December | 81.4% | – | – |
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 | 1 | – |
| February | 0 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | – | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| 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 99.2% 475
- Cancelled 0.8% 4
Share of all recorded flights in the period, all legs. · Oct 12, 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 |
|---|---|---|---|---|
| MCI DEN Kansas City International Airport – Denver International Airport | 855 | 11.6 min | 71.7% | 60 |
| SDF BWI Louisville Muhammad Ali International Airport – Baltimore/Washington International Thurgood Marshall Airport | 795 | -2.8 min | 94.6% | 58 |
| SAN BNA San Diego International Airport – Nashville International Airport | 2,812 | 9.0 min | 87.7% | 57 |
| LAS TUS Harry Reid International Airport – Tucson International Airport | 587 | 28.3 min | 28.6% | 42 |
| TPA LAS Tampa International Airport – Harry Reid International Airport | 3,188 | 15.9 min | 68.6% | 35 |
| OKC MCO OKC Will Rogers World Airport – Orlando International Airport | 1,718 | 14.0 min | 85.3% | 34 |
| KOA HNL Ellison Onizuka Kona International Airport at Keāhole – Daniel K. Inouye International Airport | 263 | 9.2 min | 84.9% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 10 | 10 | 100.0% | 0 |
| November 2024 | 14 | 13 | 100.0% | 1 |
| December 2024 | 4 | 4 | 100.0% | 0 |
| January 2025 | 14 | 14 | 57.1% | 0 |
| February 2025 | 24 | 24 | 70.8% | 0 |
| March 2025 | 29 | 29 | 75.9% | 0 |
| April 2025 | 24 | 24 | 95.8% | 0 |
| May 2025 | 22 | 22 | 72.7% | 0 |
| June 2025 | 37 | 37 | 51.4% | 0 |
| July 2025 | 38 | 38 | 47.4% | 0 |
| August 2025 | 12 | 12 | 58.3% | 0 |
| September 2025 | 8 | 8 | 75.0% | 0 |
| October 2025 | 4 | 4 | 0.0% | 0 |
| November 2025 | 36 | 36 | 80.6% | 0 |
| December 2025 | 43 | 43 | 81.4% | 0 |
| January 2026 | 31 | 30 | 86.7% | 1 |
| February 2026 | 28 | 27 | 96.3% | 1 |
| March 2026 | 31 | 31 | 83.9% | 0 |
| April 2026 | 6 | 6 | 100.0% | 0 |
| June 2026 | 31 | 31 | 77.4% | 0 |
| July 2026 | 33 | 32 | 90.6% | 1 |