WN4739
WN4739 (Southwest Airlines) is a multi-stop service on 8 routes, busiest Chicago to Austin. Of 215 departures recorded from October 2024 to July 2026, 69.5% left on time, according to the US BTS.
- On-time departures69.5%of 215 flights
- Average delay17.8 min
- July 202627
- Cancelled0.9%
- Legs flown under this number8
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods10 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 11 | 27 | ▲ 145.5% |
| February | 15 | 32 | ▲ 113.3% |
| March | 2 | 5 | ▲ 150.0% |
| April | – | – | – |
| May | – | – | – |
| June | – | 23 | – |
| July | – | 27 | – |
| August | – | – | – |
| September | – | – | – |
| October | 8 | – | in progress |
| November | 1 | – | – |
| December | – | – | – |
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 periods10 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 70.0% | 92.3% | ▲ 31.9% |
| February | 86.7% | 81.3% | ▼ 6.3% |
| March | 100.0% | 80.0% | ▼ 20.0% |
| April | – | – | – |
| May | – | – | – |
| June | – | 26.1% | – |
| July | – | 29.6% | – |
| August | – | – | – |
| September | – | – | – |
| October | 100.0% | – | in progress |
| November | 0.0% | – | – |
| December | – | – | – |
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 periods10 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 1 | 0.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | – | – | – |
| May | – | – | – |
| June | – | 0 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | – | – | – |
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 99.1% 213
- Cancelled 0.9% 2
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
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| MDW AUS Chicago Midway International Airport – Austin Bergstrom International Airport | 1,565 | 6.1 min | 80.0% | 81 |
| OMA PHX Eppley Airfield – Phoenix Sky Harbor International Airport | 1,667 | 4.6 min | 84.0% | 50 |
| DEN TPA Denver International Airport – Tampa International Airport | 2,423 | 59.1 min | 28.0% | 50 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 10 | 10 | 70.0% | 0 |
| November 2024 | 25 | 25 | 76.0% | 0 |
| December 2024 | 29 | 29 | 82.8% | 0 |
| January 2025 | 11 | 10 | 70.0% | 1 |
| February 2025 | 15 | 15 | 86.7% | 0 |
| March 2025 | 2 | 2 | 100.0% | 0 |
| October 2025 | 8 | 8 | 100.0% | 0 |
| November 2025 | 1 | 1 | 0.0% | 0 |
| January 2026 | 27 | 26 | 92.3% | 1 |
| February 2026 | 32 | 32 | 81.3% | 0 |
| March 2026 | 5 | 5 | 80.0% | 0 |
| June 2026 | 23 | 23 | 26.1% | 0 |
| July 2026 | 27 | 27 | 29.6% | 0 |