WN309
WN309 (Southwest Airlines) is a multi-stop service on 43 routes, busiest Nashville to Milwaukee. Of 895 departures recorded from October 2024 to July 2026, 82.1% left on time, according to the US BTS.
- On-time departures82.1%of 895 flights
- Average delay8.6 min
- July 202631▼ 24.4%vs July 2025
- Cancelled0.8%
- Legs flown under this number43
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 31 | 79 | ▲ 154.8% |
| February | 28 | 87 | ▲ 210.7% |
| March | 83 | 40 | ▼ 51.8% |
| April | 43 | 30 | ▼ 30.2% |
| May | 31 | 28 | ▼ 9.7% |
| June | 38 | 30 | ▼ 21.1% |
| July | 41 | 31 | ▼ 24.4% |
| August | 52 | – | – |
| September | 52 | – | – |
| October | 28 | – | in progress |
| November | 31 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 295 | 325 | ▲ 10.2% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 93.6% | 84.4% | ▼ 9.8% |
| February | 96.4% | 73.3% | ▼ 24.0% |
| March | 90.4% | 97.5% | ▲ 7.9% |
| April | 76.2% | 90.0% | ▲ 18.1% |
| May | 100.0% | 71.4% | ▼ 28.6% |
| June | 86.1% | 46.7% | ▼ 45.8% |
| July | 72.5% | 67.7% | ▼ 6.6% |
| August | 84.6% | – | – |
| September | 90.4% | – | – |
| October | 78.6% | – | in progress |
| November | 71.0% | – | – |
| December | 64.5% | – | – |
| Year-to-date average (Jan–Jul) | 87.9% | 75.9% | ▼ 13.7% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 2 | – |
| February | 0 | 1 | – |
| March | 0 | 0 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 2 | 0 | ▼ 100.0% |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 3 | ▼ 25.0% |
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 99.2% 888
- Cancelled 0.8% 7
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
10Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 30 | 30 | 86.7% | 0 |
| December 2024 | 31 | 31 | 83.9% | 0 |
| January 2025 | 31 | 31 | 93.6% | 0 |
| February 2025 | 28 | 28 | 96.4% | 0 |
| March 2025 | 83 | 83 | 90.4% | 0 |
| April 2025 | 43 | 42 | 76.2% | 1 |
| May 2025 | 31 | 31 | 100.0% | 0 |
| June 2025 | 38 | 36 | 86.1% | 2 |
| July 2025 | 41 | 40 | 72.5% | 1 |
| August 2025 | 52 | 52 | 84.6% | 0 |
| September 2025 | 52 | 52 | 90.4% | 0 |
| October 2025 | 28 | 28 | 78.6% | 0 |
| November 2025 | 31 | 31 | 71.0% | 0 |
| December 2025 | 31 | 31 | 64.5% | 0 |
| January 2026 | 79 | 77 | 84.4% | 2 |
| February 2026 | 87 | 86 | 73.3% | 1 |
| March 2026 | 40 | 40 | 97.5% | 0 |
| April 2026 | 30 | 30 | 90.0% | 0 |
| May 2026 | 28 | 28 | 71.4% | 0 |
| June 2026 | 30 | 30 | 46.7% | 0 |
| July 2026 | 31 | 31 | 67.7% | 0 |