WN4007
WN4007 (Southwest Airlines) is a multi-stop service on 27 routes, busiest Nashville to Chicago. Of 566 departures recorded from October 2024 to July 2026, 70.8% left on time, according to the US BTS.
- On-time departures70.8%of 566 flights
- Average delay16.7 min
- July 202623▼ 54.0%vs July 2025
- Cancelled1.2%
- Legs flown under this number27
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 | 23 | 10 | ▼ 56.5% |
| February | 17 | 8 | ▼ 52.9% |
| March | 29 | 21 | ▼ 27.6% |
| April | 30 | 60 | ▲ 100.0% |
| May | 31 | 68 | ▲ 119.4% |
| June | 42 | 22 | ▼ 47.6% |
| July | 50 | 23 | ▼ 54.0% |
| August | 4 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 26 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 222 | 212 | ▼ 4.5% |
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 | 95.7% | 50.0% | ▼ 47.7% |
| February | 76.5% | 62.5% | ▼ 18.3% |
| March | 67.9% | 85.0% | ▲ 25.3% |
| April | 66.7% | 78.3% | ▲ 17.5% |
| May | 48.4% | 82.1% | ▲ 69.6% |
| June | 54.8% | 90.9% | ▲ 66.0% |
| July | 46.9% | 91.3% | ▲ 94.5% |
| August | 50.0% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 64.0% | – | – |
| December | 55.6% | – | – |
| Year-to-date average (Jan–Jul) | 65.2% | 77.2% | ▲ 18.3% |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 1 | 1 | 0.0% |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 1 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 2 | 2 | 0.0% |
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 98.8% 559
- Cancelled 1.2% 7
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 29, 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 |
|---|---|---|---|---|
| FLL DCA Fort Lauderdale Hollywood International Airport – Ronald Reagan Washington National Airport | 1,451 | 34.8 min | 62.0% | 50 |
| BNA MDW Nashville International Airport – Chicago Midway International Airport | 636 | 29.3 min | 46.9% | 50 |
| FAT LAS Fresno Yosemite International Airport – Harry Reid International Airport | 416 | 0.1 min | 95.2% | 42 |
| SAN SJC San Diego International Airport – Mineta San Jose International Airport | 671 | 28.4 min | 39.4% | 36 |
| LGA MCI LaGuardia Airport – Kansas City International Airport | 1,778 | 14.1 min | 68.8% | 33 |
| PHX DAL Phoenix Sky Harbor International Airport – Dallas Love Field | 1,412 | 15.9 min | 61.3% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 18 | 18 | 66.7% | 0 |
| November 2024 | 26 | 26 | 92.3% | 0 |
| December 2024 | 29 | 29 | 75.9% | 0 |
| January 2025 | 23 | 23 | 95.7% | 0 |
| February 2025 | 17 | 17 | 76.5% | 0 |
| March 2025 | 29 | 28 | 67.9% | 1 |
| April 2025 | 30 | 30 | 66.7% | 0 |
| May 2025 | 31 | 31 | 48.4% | 0 |
| June 2025 | 42 | 42 | 54.8% | 0 |
| July 2025 | 50 | 49 | 46.9% | 1 |
| August 2025 | 4 | 4 | 50.0% | 0 |
| November 2025 | 26 | 25 | 64.0% | 1 |
| December 2025 | 29 | 27 | 55.6% | 2 |
| January 2026 | 10 | 10 | 50.0% | 0 |
| February 2026 | 8 | 8 | 62.5% | 0 |
| March 2026 | 21 | 20 | 85.0% | 1 |
| April 2026 | 60 | 60 | 78.3% | 0 |
| May 2026 | 68 | 67 | 82.1% | 1 |
| June 2026 | 22 | 22 | 90.9% | 0 |
| July 2026 | 23 | 23 | 91.3% | 0 |