WN4354
WN4354 (Southwest Airlines) is a multi-stop service on 16 routes, busiest Philadelphia to Nashville. Of 313 departures recorded from October 2024 to July 2026, 73.4% left on time, according to the US BTS.
- On-time departures73.4%of 313 flights
- Average delay12.6 min
- July 202622▲ 450.0%vs July 2025
- Cancelled0.3%
- Legs flown under this number16
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods16 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 28 | 4 | ▼ 85.7% |
| February | 24 | 1 | ▼ 95.8% |
| March | 30 | – | – |
| April | 22 | 3 | ▼ 86.4% |
| May | 21 | 4 | ▼ 81.0% |
| June | 7 | 20 | ▲ 185.7% |
| July | 4 | 22 | ▲ 450.0% |
| August | 1 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 28 | – | – |
| December | 28 | – | – |
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 periods16 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 85.7% | 75.0% | ▼ 12.5% |
| February | 87.5% | 100.0% | ▲ 14.3% |
| March | 80.0% | – | – |
| April | 68.2% | 66.7% | ▼ 2.2% |
| May | 52.4% | 25.0% | ▼ 52.3% |
| June | 100.0% | 55.0% | ▼ 45.0% |
| July | 25.0% | 40.9% | ▲ 63.6% |
| August | 100.0% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 88.9% | – | – |
| December | 92.9% | – | – |
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 periods16 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | – | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 1 | – | – |
| 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 99.7% 312
- Cancelled 0.3% 1
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PHL BNA Philadelphia International Airport – Nashville International Airport | 1,084 | 5.7 min | 81.9% | 105 |
| SMF BUR Sacramento International Airport – Hollywood Burbank/Bob Hope Airport | 577 | 3.7 min | 89.8% | 60 |
| ROC BWI Frederick Douglass Greater Rochester International Airport – Baltimore/Washington International Thurgood Marshall Airport | 447 | 26.7 min | 50.0% | 34 |
| SAN PHX San Diego International Airport – Phoenix Sky Harbor International Airport | 489 | 17.5 min | 61.3% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 10 | 10 | 60.0% | 0 |
| November 2024 | 26 | 26 | 69.2% | 0 |
| December 2024 | 30 | 30 | 80.0% | 0 |
| January 2025 | 28 | 28 | 85.7% | 0 |
| February 2025 | 24 | 24 | 87.5% | 0 |
| March 2025 | 30 | 30 | 80.0% | 0 |
| April 2025 | 22 | 22 | 68.2% | 0 |
| May 2025 | 21 | 21 | 52.4% | 0 |
| June 2025 | 7 | 7 | 100.0% | 0 |
| July 2025 | 4 | 4 | 25.0% | 0 |
| August 2025 | 1 | 1 | 100.0% | 0 |
| November 2025 | 28 | 27 | 88.9% | 1 |
| December 2025 | 28 | 28 | 92.9% | 0 |
| January 2026 | 4 | 4 | 75.0% | 0 |
| February 2026 | 1 | 1 | 100.0% | 0 |
| April 2026 | 3 | 3 | 66.7% | 0 |
| May 2026 | 4 | 4 | 25.0% | 0 |
| June 2026 | 20 | 20 | 55.0% | 0 |
| July 2026 | 22 | 22 | 40.9% | 0 |