WN4380
WN4380 (Southwest Airlines) is a multi-stop service on 21 routes, busiest Nashville to Washington. Of 495 departures recorded from October 2024 to July 2026, 73.8% left on time, according to the US BTS.
- On-time departures73.8%of 495 flights
- Average delay16.9 min
- July 202630▼ 43.4%vs July 2025
- Cancelled1.2%
- Legs flown under this number21
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 | 22 | – | – |
| February | 9 | 26 | ▲ 188.9% |
| March | 28 | 19 | ▼ 32.1% |
| April | 34 | 25 | ▼ 26.5% |
| May | 42 | 26 | ▼ 38.1% |
| June | 47 | 30 | ▼ 36.2% |
| July | 53 | 30 | ▼ 43.4% |
| August | 25 | – | – |
| September | 22 | – | – |
| October | 1 | – | in progress |
| November | – | – | – |
| December | – | – | – |
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% | – | – |
| February | 100.0% | 88.5% | ▼ 11.5% |
| March | 82.1% | 84.2% | ▲ 2.5% |
| April | 73.5% | 92.0% | ▲ 25.1% |
| May | 73.8% | 84.6% | ▲ 14.6% |
| June | 61.7% | 56.7% | ▼ 8.2% |
| July | 59.6% | 42.3% | ▼ 29.0% |
| August | 92.0% | – | – |
| September | 95.5% | – | – |
| October | 100.0% | – | in progress |
| November | – | – | – |
| December | – | – | – |
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 | 1 | – | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 4 | ▲ 300.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | – | – | – |
| December | – | – | – |
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% 489
- Cancelled 1.2% 6
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 DCA Nashville International Airport – Ronald Reagan Washington National Airport | 903 | 20.0 min | 68.0% | 107 |
| SEA SJC Seattle–Tacoma International Airport – Mineta San Jose International Airport | 1,122 | 17.6 min | 75.8% | 63 |
| OKC PHX OKC Will Rogers World Airport – Phoenix Sky Harbor International Airport | 1,338 | 8.7 min | 78.0% | 50 |
| SAN DEN San Diego International Airport – Denver International Airport | 1,371 | 54.7 min | 37.2% | 43 |
| STL BNA St. Louis Lambert International Airport – Nashville International Airport | 437 | -1.6 min | 97.6% | 42 |
| MCO DAL Orlando International Airport – Dallas Love Field | 1,564 | 21.1 min | 75.8% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 94.7% | 0 |
| November 2024 | 21 | 21 | 76.2% | 0 |
| December 2024 | 16 | 16 | 25.0% | 0 |
| January 2025 | 22 | 21 | 85.7% | 1 |
| February 2025 | 9 | 9 | 100.0% | 0 |
| March 2025 | 28 | 28 | 82.1% | 0 |
| April 2025 | 34 | 34 | 73.5% | 0 |
| May 2025 | 42 | 42 | 73.8% | 0 |
| June 2025 | 47 | 47 | 61.7% | 0 |
| July 2025 | 53 | 52 | 59.6% | 1 |
| August 2025 | 25 | 25 | 92.0% | 0 |
| September 2025 | 22 | 22 | 95.5% | 0 |
| October 2025 | 1 | 1 | 100.0% | 0 |
| February 2026 | 26 | 26 | 88.5% | 0 |
| March 2026 | 19 | 19 | 84.2% | 0 |
| April 2026 | 25 | 25 | 92.0% | 0 |
| May 2026 | 26 | 26 | 84.6% | 0 |
| June 2026 | 30 | 30 | 56.7% | 0 |
| July 2026 | 30 | 26 | 42.3% | 4 |