WN4167
WN4167 (Southwest Airlines) is a multi-stop service on 19 routes, busiest Washington to Nashville. Of 314 departures recorded from October 2024 to July 2026, 73.6% left on time, according to the US BTS.
- On-time departures73.6%of 314 flights
- Average delay16.6 min
- July 202630
- Cancelled0.0%
- 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 periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 20 | 7 | ▼ 65.0% |
| February | 11 | 15 | ▲ 36.4% |
| March | 15 | 2 | ▼ 86.7% |
| April | 29 | 3 | ▼ 89.7% |
| May | 34 | 4 | ▼ 88.2% |
| June | 5 | 27 | ▲ 440.0% |
| July | – | 30 | – |
| August | 23 | – | – |
| September | 25 | – | – |
| October | – | – | in progress |
| November | 15 | – | – |
| 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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 80.0% | 85.7% | ▲ 7.1% |
| February | 90.9% | 53.3% | ▼ 41.3% |
| March | 53.3% | 50.0% | ▼ 6.2% |
| April | 75.9% | 100.0% | ▲ 31.8% |
| May | 58.8% | 100.0% | ▲ 70.0% |
| June | 80.0% | 96.3% | ▲ 20.4% |
| July | – | 93.3% | – |
| August | 69.6% | – | – |
| September | 68.0% | – | – |
| October | – | – | in progress |
| November | 40.0% | – | – |
| 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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| 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 100.0% 314
- Cancelled 0.0% 0
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
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DCA BNA Ronald Reagan Washington National Airport – Nashville International Airport | 903 | 19.8 min | 63.8% | 58 |
| CHS MDW Charleston International Airport – Chicago Midway International Airport | 1,200 | 1.5 min | 94.7% | 57 |
| RNO SAN Reno Tahoe International Airport – San Diego International Airport | 787 | 13.8 min | 78.1% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 27 | 27 | 74.1% | 0 |
| November 2024 | 6 | 6 | 83.3% | 0 |
| December 2024 | 10 | 10 | 80.0% | 0 |
| January 2025 | 20 | 20 | 80.0% | 0 |
| February 2025 | 11 | 11 | 90.9% | 0 |
| March 2025 | 15 | 15 | 53.3% | 0 |
| April 2025 | 29 | 29 | 75.9% | 0 |
| May 2025 | 34 | 34 | 58.8% | 0 |
| June 2025 | 5 | 5 | 80.0% | 0 |
| August 2025 | 23 | 23 | 69.6% | 0 |
| September 2025 | 25 | 25 | 68.0% | 0 |
| November 2025 | 15 | 15 | 40.0% | 0 |
| December 2025 | 6 | 6 | 50.0% | 0 |
| January 2026 | 7 | 7 | 85.7% | 0 |
| February 2026 | 15 | 15 | 53.3% | 0 |
| March 2026 | 2 | 2 | 50.0% | 0 |
| April 2026 | 3 | 3 | 100.0% | 0 |
| May 2026 | 4 | 4 | 100.0% | 0 |
| June 2026 | 27 | 27 | 96.3% | 0 |
| July 2026 | 30 | 30 | 93.3% | 0 |