WN4574
WN4574 (Southwest Airlines) is a multi-stop service on 19 routes, busiest Greenville to Nashville. Of 394 departures recorded from October 2024 to July 2026, 88.9% left on time, according to the US BTS.
- On-time departures88.9%of 394 flights
- Average delay4.0 min
- July 202618▼ 55.0%vs July 2025
- Cancelled1.8%
- Legs flown under this number19
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods15 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 4 | 59 | ▲ 1,375.0% |
| February | – | 77 | – |
| March | 20 | 10 | ▼ 50.0% |
| April | 5 | 16 | ▲ 220.0% |
| May | – | 23 | – |
| June | 34 | 17 | ▼ 50.0% |
| July | 40 | 18 | ▼ 55.0% |
| August | 5 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 16 | – | – |
| December | 6 | – | – |
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 periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 75.0% | 94.4% | ▲ 25.9% |
| February | – | 89.5% | – |
| March | 89.5% | 100.0% | ▲ 11.8% |
| April | 40.0% | 100.0% | ▲ 150.0% |
| May | – | 82.6% | – |
| June | 88.2% | 100.0% | ▲ 13.3% |
| July | 87.5% | 100.0% | ▲ 14.3% |
| August | 100.0% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 68.8% | – | – |
| December | 50.0% | – | – |
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 periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 5 | – |
| February | – | 1 | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | – | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | – | – | 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 98.2% 387
- Cancelled 1.8% 7
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 |
|---|---|---|---|---|
| GSP BNA Greenville-Spartanburg International Airport – Nashville International Airport | 426 | 0.1 min | 92.9% | 58 |
| BWI GSP Baltimore/Washington International Thurgood Marshall Airport – Greenville-Spartanburg International Airport | 685 | -1.6 min | 92.9% | 58 |
| SMF SNA Sacramento International Airport – John Wayne Orange County International Airport | 650 | 1.3 min | 90.5% | 42 |
| TPA MSY Tampa International Airport – Louis Armstrong New Orleans International Airport | 785 | 5.5 min | 90.0% | 40 |
| LGB DEN Long Beach International Airport – Denver International Airport | 1,373 | -3.3 min | 100.0% | 34 |
| PHX MDW Phoenix Sky Harbor International Airport – Chicago Midway International Airport | 2,319 | 2.2 min | 90.3% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 11 | 11 | 90.9% | 0 |
| November 2024 | 18 | 18 | 100.0% | 0 |
| December 2024 | 15 | 15 | 73.3% | 0 |
| January 2025 | 4 | 4 | 75.0% | 0 |
| March 2025 | 20 | 19 | 89.5% | 1 |
| April 2025 | 5 | 5 | 40.0% | 0 |
| June 2025 | 34 | 34 | 88.2% | 0 |
| July 2025 | 40 | 40 | 87.5% | 0 |
| August 2025 | 5 | 5 | 100.0% | 0 |
| November 2025 | 16 | 16 | 68.8% | 0 |
| December 2025 | 6 | 6 | 50.0% | 0 |
| January 2026 | 59 | 54 | 94.4% | 5 |
| February 2026 | 77 | 76 | 89.5% | 1 |
| March 2026 | 10 | 10 | 100.0% | 0 |
| April 2026 | 16 | 16 | 100.0% | 0 |
| May 2026 | 23 | 23 | 82.6% | 0 |
| June 2026 | 17 | 17 | 100.0% | 0 |
| July 2026 | 18 | 18 | 100.0% | 0 |