WN403
WN403 (Southwest Airlines) is a multi-stop service on 45 routes, busiest Austin to Chicago. Of 668 departures recorded from October 2024 to July 2026, 73.5% left on time, according to the US BTS.
- On-time departures73.5%of 668 flights
- Average delay14.1 min
- July 202654▲ 45.9%vs July 2025
- Cancelled1.2%
- Legs flown under this number45
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 | 30 | 14 | ▼ 53.3% |
| February | 27 | 19 | ▼ 29.6% |
| March | 35 | 29 | ▼ 17.1% |
| April | 25 | 30 | ▲ 20.0% |
| May | 22 | 31 | ▲ 40.9% |
| June | 39 | 49 | ▲ 25.6% |
| July | 37 | 54 | ▲ 45.9% |
| August | 35 | – | – |
| September | 30 | – | – |
| October | 5 | – | in progress |
| November | 39 | – | – |
| December | 45 | – | – |
| Year to date (Jan–Jul) | 215 | 226 | ▲ 5.1% |
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 | 77.8% | 92.9% | ▲ 19.4% |
| February | 96.3% | 94.4% | ▼ 1.9% |
| March | 74.3% | 42.9% | ▼ 42.3% |
| April | 79.2% | 76.7% | ▼ 3.2% |
| May | 54.6% | 48.4% | ▼ 11.3% |
| June | 69.2% | 67.4% | ▼ 2.7% |
| July | 67.6% | 81.1% | ▲ 20.1% |
| August | 71.4% | – | – |
| September | 83.3% | – | – |
| October | 100.0% | – | in progress |
| November | 84.6% | – | – |
| December | 62.2% | – | – |
| Year-to-date average (Jan–Jul) | 74.1% | 72.0% | ▼ 2.9% |
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 | 3 | 0 | ▼ 100.0% |
| February | 0 | 1 | – |
| March | 0 | 1 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| 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 98.8% 660
- Cancelled 1.2% 8
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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| AUS MDW Austin Bergstrom International Airport – Chicago Midway International Airport | 1,565 | 25.8 min | 58.6% | 58 |
| ATL LGA Hartsfield Jackson Atlanta International Airport – LaGuardia Airport | 1,225 | 6.9 min | 82.8% | 58 |
| SLC PHX Salt Lake City International Airport – Phoenix Sky Harbor International Airport | 818 | 9.8 min | 79.6% | 49 |
| ATL MCI Hartsfield Jackson Atlanta International Airport – Kansas City International Airport | 1,114 | 5.7 min | 84.8% | 46 |
| SNA LAS John Wayne Orange County International Airport – Harry Reid International Airport | 365 | -1.1 min | 95.5% | 44 |
| AUS SLC Austin Bergstrom International Airport – Salt Lake City International Airport | 1,747 | 8.7 min | 82.4% | 34 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 18 | 17 | 82.4% | 1 |
| November 2024 | 19 | 19 | 84.2% | 0 |
| December 2024 | 36 | 36 | 75.0% | 0 |
| January 2025 | 30 | 27 | 77.8% | 3 |
| February 2025 | 27 | 27 | 96.3% | 0 |
| March 2025 | 35 | 35 | 74.3% | 0 |
| April 2025 | 25 | 24 | 79.2% | 1 |
| May 2025 | 22 | 22 | 54.6% | 0 |
| June 2025 | 39 | 39 | 69.2% | 0 |
| July 2025 | 37 | 37 | 67.6% | 0 |
| August 2025 | 35 | 35 | 71.4% | 0 |
| September 2025 | 30 | 30 | 83.3% | 0 |
| October 2025 | 5 | 5 | 100.0% | 0 |
| November 2025 | 39 | 39 | 84.6% | 0 |
| December 2025 | 45 | 45 | 62.2% | 0 |
| January 2026 | 14 | 14 | 92.9% | 0 |
| February 2026 | 19 | 18 | 94.4% | 1 |
| March 2026 | 29 | 28 | 42.9% | 1 |
| April 2026 | 30 | 30 | 76.7% | 0 |
| May 2026 | 31 | 31 | 48.4% | 0 |
| June 2026 | 49 | 49 | 67.4% | 0 |
| July 2026 | 54 | 53 | 81.1% | 1 |