WN4430
WN4430 (Southwest Airlines) is a multi-stop service on 23 routes, busiest Tampa to St Louis. Of 384 departures recorded from November 2024 to July 2026, 83.5% left on time, according to the US BTS.
- On-time departures83.5%of 384 flights
- Average delay7.9 min
- July 202627▲ 575.0%vs July 2025
- Cancelled0.5%
- 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 | 7 | 10 | ▲ 42.9% |
| February | 8 | 19 | ▲ 137.5% |
| March | 13 | 29 | ▲ 123.1% |
| April | 6 | 17 | ▲ 183.3% |
| May | 3 | 13 | ▲ 333.3% |
| June | 5 | 24 | ▲ 380.0% |
| July | 4 | 27 | ▲ 575.0% |
| August | 27 | – | – |
| September | 30 | – | – |
| October | 62 | – | in progress |
| November | 8 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 46 | 139 | ▲ 202.2% |
according to the US BTS · November 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 | 71.4% | 100.0% | ▲ 40.0% |
| February | 75.0% | 73.7% | ▼ 1.8% |
| March | 92.3% | 50.0% | ▼ 45.8% |
| April | 66.7% | 82.4% | ▲ 23.5% |
| May | 33.3% | 92.3% | ▲ 177.0% |
| June | 60.0% | 100.0% | ▲ 66.7% |
| July | 50.0% | 100.0% | ▲ 100.0% |
| August | 76.9% | – | – |
| September | 90.0% | – | – |
| October | 87.1% | – | in progress |
| November | 100.0% | – | – |
| December | 100.0% | – | – |
| Year-to-date average (Jan–Jul) | 64.1% | 85.5% | ▲ 33.3% |
according to the US BTS · November 2024 → July 2026
Average departure delay by month
according to the US BTS · November 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 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 1 |
according to the US BTS · November 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 99.5% 382
- Cancelled 0.5% 2
Share of all recorded flights in the period, all legs. · Nov 3, 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 STL Tampa International Airport – St. Louis Lambert International Airport | 1,400 | 10.9 min | 85.7% | 57 |
| AUS ATL Austin Bergstrom International Airport – Hartsfield Jackson Atlanta International Airport | 1,305 | 4.3 min | 90.4% | 52 |
| BNA HOU Nashville International Airport – William P. Hobby Airport | 1,078 | -2.5 min | 100.0% | 49 |
| SFO DEN San Francisco International Airport – Denver International Airport | 1,553 | 30.5 min | 46.9% | 33 |
| PHX SEA Phoenix Sky Harbor International Airport – Seattle–Tacoma International Airport | 1,782 | 12.6 min | 83.3% | 30 |
| BWI ALB Baltimore/Washington International Thurgood Marshall Airport – Albany International Airport | 464 | 7.6 min | 80.0% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| November 2024 | 34 | 34 | 97.1% | 0 |
| December 2024 | 36 | 36 | 75.0% | 0 |
| January 2025 | 7 | 7 | 71.4% | 0 |
| February 2025 | 8 | 8 | 75.0% | 0 |
| March 2025 | 13 | 13 | 92.3% | 0 |
| April 2025 | 6 | 6 | 66.7% | 0 |
| May 2025 | 3 | 3 | 33.3% | 0 |
| June 2025 | 5 | 5 | 60.0% | 0 |
| July 2025 | 4 | 4 | 50.0% | 0 |
| August 2025 | 27 | 26 | 76.9% | 1 |
| September 2025 | 30 | 30 | 90.0% | 0 |
| October 2025 | 62 | 62 | 87.1% | 0 |
| November 2025 | 8 | 8 | 100.0% | 0 |
| December 2025 | 2 | 2 | 100.0% | 0 |
| January 2026 | 10 | 10 | 100.0% | 0 |
| February 2026 | 19 | 19 | 73.7% | 0 |
| March 2026 | 29 | 28 | 50.0% | 1 |
| April 2026 | 17 | 17 | 82.4% | 0 |
| May 2026 | 13 | 13 | 92.3% | 0 |
| June 2026 | 24 | 24 | 100.0% | 0 |
| July 2026 | 27 | 27 | 100.0% | 0 |