WN478
WN478 (Southwest Airlines) is a multi-stop service on 39 routes, busiest Austin to Chicago. Of 786 departures recorded from October 2024 to July 2026, 72.0% left on time, according to the US BTS.
- On-time departures72.0%of 786 flights
- Average delay15.3 min
- July 202683▲ 93.0%vs July 2025
- Cancelled1.3%
- Legs flown under this number39
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 | 34 | 27 | ▼ 20.6% |
| February | 35 | 36 | ▲ 2.9% |
| March | 33 | 31 | ▼ 6.1% |
| April | 33 | 20 | ▼ 39.4% |
| May | 37 | 19 | ▼ 48.6% |
| June | 42 | 76 | ▲ 81.0% |
| July | 43 | 83 | ▲ 93.0% |
| August | 41 | – | – |
| September | 39 | – | – |
| October | 19 | – | in progress |
| November | 28 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 257 | 292 | ▲ 13.6% |
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 | 75.0% | 92.3% | ▲ 23.1% |
| February | 94.3% | 58.3% | ▼ 38.1% |
| March | 69.7% | 83.9% | ▲ 20.3% |
| April | 93.9% | 90.0% | ▼ 4.2% |
| May | 91.9% | 94.7% | ▲ 3.1% |
| June | 82.5% | 39.5% | ▼ 52.2% |
| July | 81.4% | 30.0% | ▼ 63.1% |
| August | 82.9% | – | – |
| September | 74.4% | – | – |
| October | 79.0% | – | in progress |
| November | 74.1% | – | – |
| December | 57.1% | – | – |
| Year-to-date average (Jan–Jul) | 84.1% | 69.8% | ▼ 17.0% |
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 | 2 | 1 | ▼ 50.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 2 | 0 | ▼ 100.0% |
| July | 0 | 3 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 4 | 4 | 0.0% |
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% 776
- Cancelled 1.3% 10
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
12Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 11 | 11 | 81.8% | 0 |
| November 2024 | 31 | 31 | 93.6% | 0 |
| December 2024 | 39 | 39 | 84.6% | 0 |
| January 2025 | 34 | 32 | 75.0% | 2 |
| February 2025 | 35 | 35 | 94.3% | 0 |
| March 2025 | 33 | 33 | 69.7% | 0 |
| April 2025 | 33 | 33 | 93.9% | 0 |
| May 2025 | 37 | 37 | 91.9% | 0 |
| June 2025 | 42 | 40 | 82.5% | 2 |
| July 2025 | 43 | 43 | 81.4% | 0 |
| August 2025 | 41 | 41 | 82.9% | 0 |
| September 2025 | 39 | 39 | 74.4% | 0 |
| October 2025 | 19 | 19 | 79.0% | 0 |
| November 2025 | 28 | 27 | 74.1% | 1 |
| December 2025 | 29 | 28 | 57.1% | 1 |
| January 2026 | 27 | 26 | 92.3% | 1 |
| February 2026 | 36 | 36 | 58.3% | 0 |
| March 2026 | 31 | 31 | 83.9% | 0 |
| April 2026 | 20 | 20 | 90.0% | 0 |
| May 2026 | 19 | 19 | 94.7% | 0 |
| June 2026 | 76 | 76 | 39.5% | 0 |
| July 2026 | 83 | 80 | 30.0% | 3 |