WN523
WN523 (Southwest Airlines) is a multi-stop service on 27 routes, busiest Nashville to Atlanta. Of 708 departures recorded from October 2024 to July 2026, 79.9% left on time, according to the US BTS.
- On-time departures79.9%of 708 flights
- Average delay8.8 min
- July 202637▼ 55.4%vs July 2025
- Cancelled1.1%
- Legs flown under this number27
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 | 14 | ▼ 54.8% |
| February | 28 | 21 | ▼ 25.0% |
| March | 43 | 31 | ▼ 27.9% |
| April | 30 | 17 | ▼ 43.3% |
| May | 27 | 13 | ▼ 51.9% |
| June | 73 | 37 | ▼ 49.3% |
| July | 83 | 37 | ▼ 55.4% |
| August | 24 | – | – |
| September | 17 | – | – |
| October | 39 | – | in progress |
| November | 31 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 315 | 170 | ▼ 46.0% |
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 | 86.7% | 84.6% | ▼ 2.4% |
| February | 88.9% | 71.4% | ▼ 19.6% |
| March | 90.7% | 93.6% | ▲ 3.1% |
| April | 86.7% | 100.0% | ▲ 15.4% |
| May | 74.1% | 100.0% | ▲ 35.0% |
| June | 72.6% | 75.7% | ▲ 4.2% |
| July | 71.1% | 63.6% | ▼ 10.5% |
| August | 75.0% | – | – |
| September | 88.2% | – | – |
| October | 84.6% | – | in progress |
| November | 71.0% | – | – |
| December | 66.7% | – | – |
| Year-to-date average (Jan–Jul) | 81.5% | 84.1% | ▲ 3.2% |
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 | 1 | 1 | 0.0% |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 4 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 2 | 5 | ▲ 150.0% |
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 98.9% 700
- Cancelled 1.1% 8
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
9Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 30 | 30 | 93.3% | 0 |
| December 2024 | 31 | 31 | 71.0% | 0 |
| January 2025 | 31 | 30 | 86.7% | 1 |
| February 2025 | 28 | 27 | 88.9% | 1 |
| March 2025 | 43 | 43 | 90.7% | 0 |
| April 2025 | 30 | 30 | 86.7% | 0 |
| May 2025 | 27 | 27 | 74.1% | 0 |
| June 2025 | 73 | 73 | 72.6% | 0 |
| July 2025 | 83 | 83 | 71.1% | 0 |
| August 2025 | 24 | 24 | 75.0% | 0 |
| September 2025 | 17 | 17 | 88.2% | 0 |
| October 2025 | 39 | 39 | 84.6% | 0 |
| November 2025 | 31 | 31 | 71.0% | 0 |
| December 2025 | 31 | 30 | 66.7% | 1 |
| January 2026 | 14 | 13 | 84.6% | 1 |
| February 2026 | 21 | 21 | 71.4% | 0 |
| March 2026 | 31 | 31 | 93.6% | 0 |
| April 2026 | 17 | 17 | 100.0% | 0 |
| May 2026 | 13 | 13 | 100.0% | 0 |
| June 2026 | 37 | 37 | 75.7% | 0 |
| July 2026 | 37 | 33 | 63.6% | 4 |