WN4489
WN4489 (Southwest Airlines) is a multi-stop service on 19 routes, busiest Nashville to San Diego. Of 471 departures recorded from October 2024 to July 2026, 70.5% left on time, according to the US BTS.
- On-time departures70.5%of 471 flights
- Average delay16.5 min
- July 202630▲ 275.0%vs July 2025
- Cancelled1.3%
- 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 periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 28 | 6 | ▼ 78.6% |
| February | 28 | 6 | ▼ 78.6% |
| March | 31 | 13 | ▼ 58.1% |
| April | 30 | 27 | ▼ 10.0% |
| May | 30 | 31 | ▲ 3.3% |
| June | 12 | 30 | ▲ 150.0% |
| July | 8 | 30 | ▲ 275.0% |
| August | 17 | – | – |
| September | 17 | – | – |
| October | – | – | in progress |
| November | 28 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 167 | 143 | ▼ 14.4% |
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 | 77.8% | 33.3% | ▼ 57.1% |
| February | 82.1% | 100.0% | ▲ 21.7% |
| March | 90.3% | 100.0% | ▲ 10.7% |
| April | 73.3% | 96.3% | ▲ 31.3% |
| May | 51.7% | 93.6% | ▲ 80.9% |
| June | 75.0% | 36.7% | ▼ 51.1% |
| July | 100.0% | 56.7% | ▼ 43.3% |
| August | 58.8% | – | – |
| September | 52.9% | – | – |
| October | – | – | in progress |
| November | 64.0% | – | – |
| December | 61.3% | – | – |
| Year-to-date average (Jan–Jul) | 78.6% | 73.8% | ▼ 6.1% |
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 | 1 | 0 | ▼ 100.0% |
| February | 0 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | – | – | in progress |
| November | 3 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 1 | ▼ 50.0% |
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 98.7% 465
- Cancelled 1.3% 6
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
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BNA SAN Nashville International Airport – San Diego International Airport | 2,812 | 19.4 min | 70.1% | 108 |
| HOU LAS William P. Hobby Airport – Harry Reid International Airport | 1,985 | 23.3 min | 59.0% | 64 |
| STL MDW St. Louis Lambert International Airport – Chicago Midway International Airport | 404 | 0.9 min | 93.1% | 58 |
| LAS DAL Harry Reid International Airport – Dallas Love Field | 1,714 | 30.6 min | 45.6% | 57 |
| DAL LBB Dallas Love Field – Lubbock Preston Smith International Airport | 472 | 17.9 min | 58.9% | 57 |
| SAN BWI San Diego International Airport – Baltimore/Washington International Thurgood Marshall Airport | 3,686 | 11.8 min | 87.5% | 32 |
| ONT DEN Ontario International Airport – Denver International Airport | 1,316 | 32.6 min | 53.1% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 16 | 16 | 81.3% | 0 |
| November 2024 | 24 | 24 | 66.7% | 0 |
| December 2024 | 28 | 28 | 57.1% | 0 |
| January 2025 | 28 | 27 | 77.8% | 1 |
| February 2025 | 28 | 28 | 82.1% | 0 |
| March 2025 | 31 | 31 | 90.3% | 0 |
| April 2025 | 30 | 30 | 73.3% | 0 |
| May 2025 | 30 | 29 | 51.7% | 1 |
| June 2025 | 12 | 12 | 75.0% | 0 |
| July 2025 | 8 | 8 | 100.0% | 0 |
| August 2025 | 17 | 17 | 58.8% | 0 |
| September 2025 | 17 | 17 | 52.9% | 0 |
| November 2025 | 28 | 25 | 64.0% | 3 |
| December 2025 | 31 | 31 | 61.3% | 0 |
| January 2026 | 6 | 6 | 33.3% | 0 |
| February 2026 | 6 | 5 | 100.0% | 1 |
| March 2026 | 13 | 13 | 100.0% | 0 |
| April 2026 | 27 | 27 | 96.3% | 0 |
| May 2026 | 31 | 31 | 93.6% | 0 |
| June 2026 | 30 | 30 | 36.7% | 0 |
| July 2026 | 30 | 30 | 56.7% | 0 |