WN4350
WN4350 (Southwest Airlines) is a multi-stop service on 22 routes, busiest Nashville to Chicago. Of 410 departures recorded from October 2024 to July 2026, 75.1% left on time, according to the US BTS.
- On-time departures75.1%of 410 flights
- Average delay10.7 min
- July 202626▼ 13.3%vs July 2025
- Cancelled1.2%
- 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 | 3 | ▼ 78.6% |
| February | 22 | 3 | ▼ 86.4% |
| March | 23 | 27 | ▲ 17.4% |
| April | 25 | 30 | ▲ 20.0% |
| May | 26 | 31 | ▲ 19.2% |
| June | 30 | 22 | ▼ 26.7% |
| July | 30 | 26 | ▼ 13.3% |
| August | 4 | – | – |
| September | – | – | – |
| October | 17 | – | in progress |
| November | 5 | – | – |
| December | 11 | – | – |
| Year to date (Jan–Jul) | 170 | 142 | ▼ 16.5% |
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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 85.7% | 0.0% | ▼ 100.0% |
| February | 72.7% | 100.0% | ▲ 37.5% |
| March | 82.6% | 76.9% | ▼ 6.9% |
| April | 88.0% | 63.3% | ▼ 28.0% |
| May | 50.0% | 24.1% | ▼ 51.7% |
| June | 100.0% | 86.4% | ▼ 13.6% |
| July | 89.7% | 100.0% | ▲ 11.5% |
| August | 75.0% | – | – |
| September | – | – | – |
| October | 52.9% | – | in progress |
| November | 60.0% | – | – |
| December | 60.0% | – | – |
| Year-to-date average (Jan–Jul) | 81.2% | 64.4% | ▼ 20.7% |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 2 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 1 | 3 | ▲ 200.0% |
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% 405
- Cancelled 1.2% 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 |
|---|---|---|---|---|
| BNA MDW Nashville International Airport – Chicago Midway International Airport | 636 | 0.6 min | 93.2% | 60 |
| BNA LGA Nashville International Airport – LaGuardia Airport | 1,228 | 27.8 min | 37.5% | 58 |
| MSY AUS Louis Armstrong New Orleans International Airport – Austin Bergstrom International Airport | 712 | 16.9 min | 70.0% | 50 |
| PIT LAS Pittsburgh International Airport – Harry Reid International Airport | 3,066 | 4.8 min | 97.6% | 42 |
| MDW SEA Chicago Midway International Airport – Seattle–Tacoma International Airport | 2,782 | 5.5 min | 81.1% | 37 |
| SAN DAL San Diego International Airport – Dallas Love Field | 1,899 | 8.8 min | 81.3% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 14 | 14 | 78.6% | 0 |
| November 2024 | 27 | 27 | 92.6% | 0 |
| December 2024 | 20 | 20 | 75.0% | 0 |
| January 2025 | 14 | 14 | 85.7% | 0 |
| February 2025 | 22 | 22 | 72.7% | 0 |
| March 2025 | 23 | 23 | 82.6% | 0 |
| April 2025 | 25 | 25 | 88.0% | 0 |
| May 2025 | 26 | 26 | 50.0% | 0 |
| June 2025 | 30 | 30 | 100.0% | 0 |
| July 2025 | 30 | 29 | 89.7% | 1 |
| August 2025 | 4 | 4 | 75.0% | 0 |
| October 2025 | 17 | 17 | 52.9% | 0 |
| November 2025 | 5 | 5 | 60.0% | 0 |
| December 2025 | 11 | 10 | 60.0% | 1 |
| January 2026 | 3 | 3 | 0.0% | 0 |
| February 2026 | 3 | 3 | 100.0% | 0 |
| March 2026 | 27 | 26 | 76.9% | 1 |
| April 2026 | 30 | 30 | 63.3% | 0 |
| May 2026 | 31 | 29 | 24.1% | 2 |
| June 2026 | 22 | 22 | 86.4% | 0 |
| July 2026 | 26 | 26 | 100.0% | 0 |