WN4457
WN4457 (Southwest Airlines) is a multi-stop service on 13 routes, busiest Tampa to Denver. Of 385 departures recorded from October 2024 to July 2026, 73.7% left on time, according to the US BTS.
- On-time departures73.7%of 385 flights
- Average delay13.9 min
- July 202626▼ 16.1%vs July 2025
- Cancelled1.3%
- Legs flown under this number13
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 3 | 14 | ▲ 366.7% |
| February | 2 | 18 | ▲ 800.0% |
| March | 5 | 2 | ▼ 60.0% |
| April | 16 | – | – |
| May | 23 | – | – |
| June | 28 | 23 | ▼ 17.9% |
| July | 31 | 26 | ▼ 16.1% |
| August | 23 | – | – |
| September | 21 | – | – |
| October | 29 | – | in progress |
| November | 32 | – | – |
| December | 49 | – | – |
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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 66.7% | 61.5% | ▼ 7.7% |
| February | 100.0% | 62.5% | ▼ 37.5% |
| March | 100.0% | 50.0% | ▼ 50.0% |
| April | 68.8% | – | – |
| May | 52.2% | – | – |
| June | 100.0% | 34.8% | ▼ 65.2% |
| July | 83.9% | 38.5% | ▼ 54.1% |
| August | 69.6% | – | – |
| September | 66.7% | – | – |
| October | 86.2% | – | in progress |
| November | 90.6% | – | – |
| December | 89.8% | – | – |
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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 0 | 2 | – |
| March | 0 | 0 | – |
| April | 0 | – | – |
| May | 0 | – | – |
| June | 0 | 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 98.7% 380
- Cancelled 1.3% 5
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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| TPA DEN Tampa International Airport – Denver International Airport | 2,423 | 3.3 min | 92.1% | 63 |
| SEA DEN Seattle–Tacoma International Airport – Denver International Airport | 1,645 | 8.8 min | 91.8% | 61 |
| MCI SAN Kansas City International Airport – San Diego International Airport | 2,142 | 28.6 min | 36.7% | 49 |
| MCO BNA Orlando International Airport – Nashville International Airport | 993 | 27.2 min | 62.5% | 40 |
| HOU MEM William P. Hobby Airport – Frederick W. Smith International Airport | 780 | 15.2 min | 65.0% | 40 |
| SFO LAX San Francisco International Airport – Los Angeles International Airport | 543 | 1.8 min | 86.7% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 85.0% | 0 |
| November 2024 | 8 | 7 | 85.7% | 1 |
| December 2024 | 12 | 11 | 54.6% | 1 |
| January 2025 | 3 | 3 | 66.7% | 0 |
| February 2025 | 2 | 2 | 100.0% | 0 |
| March 2025 | 5 | 5 | 100.0% | 0 |
| April 2025 | 16 | 16 | 68.8% | 0 |
| May 2025 | 23 | 23 | 52.2% | 0 |
| June 2025 | 28 | 28 | 100.0% | 0 |
| July 2025 | 31 | 31 | 83.9% | 0 |
| August 2025 | 23 | 23 | 69.6% | 0 |
| September 2025 | 21 | 21 | 66.7% | 0 |
| October 2025 | 29 | 29 | 86.2% | 0 |
| November 2025 | 32 | 32 | 90.6% | 0 |
| December 2025 | 49 | 49 | 89.8% | 0 |
| January 2026 | 14 | 13 | 61.5% | 1 |
| February 2026 | 18 | 16 | 62.5% | 2 |
| March 2026 | 2 | 2 | 50.0% | 0 |
| June 2026 | 23 | 23 | 34.8% | 0 |
| July 2026 | 26 | 26 | 38.5% | 0 |