WN4490
WN4490 (Southwest Airlines) is a multi-stop service on 20 routes, busiest Baltimore to Austin. Of 377 departures recorded from October 2024 to July 2026, 78.8% left on time, according to the US BTS.
- On-time departures78.8%of 377 flights
- Average delay10.1 min
- July 202627
- Cancelled1.1%
- Legs flown under this number20
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 15 | 1 | ▼ 93.3% |
| February | 15 | 1 | ▼ 93.3% |
| March | 24 | 23 | ▼ 4.2% |
| April | 9 | 5 | ▼ 44.4% |
| May | 3 | 1 | ▼ 66.7% |
| June | 1 | 23 | ▲ 2,200.0% |
| July | – | 27 | – |
| August | 23 | – | – |
| September | 24 | – | – |
| October | 31 | – | in progress |
| November | 12 | – | – |
| December | 16 | – | – |
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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 50.0% | 100.0% | ▲ 100.0% |
| February | 73.3% | 100.0% | ▲ 36.4% |
| March | 73.9% | 87.0% | ▲ 17.7% |
| April | 88.9% | 80.0% | ▼ 10.0% |
| May | 33.3% | 100.0% | ▲ 200.0% |
| June | 0.0% | 82.6% | – |
| July | – | 88.9% | – |
| August | 87.0% | – | – |
| September | 70.8% | – | – |
| October | 77.4% | – | in progress |
| November | 58.3% | – | – |
| December | 62.5% | – | – |
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 periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 3 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 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% 373
- Cancelled 1.1% 4
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BWI AUS Baltimore/Washington International Thurgood Marshall Airport – Austin Bergstrom International Airport | 2,156 | 15.9 min | 73.4% | 81 |
| HOU OKC William P. Hobby Airport – OKC Will Rogers World Airport | 675 | 4.1 min | 86.0% | 50 |
| HOU LAS William P. Hobby Airport – Harry Reid International Airport | 1,985 | 6.9 min | 83.3% | 42 |
| SJC SNA Mineta San Jose International Airport – John Wayne Orange County International Airport | 550 | 14.8 min | 77.4% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 24 | 24 | 83.3% | 0 |
| November 2024 | 43 | 43 | 86.1% | 0 |
| December 2024 | 56 | 56 | 82.1% | 0 |
| January 2025 | 15 | 12 | 50.0% | 3 |
| February 2025 | 15 | 15 | 73.3% | 0 |
| March 2025 | 24 | 23 | 73.9% | 1 |
| April 2025 | 9 | 9 | 88.9% | 0 |
| May 2025 | 3 | 3 | 33.3% | 0 |
| June 2025 | 1 | 1 | 0.0% | 0 |
| August 2025 | 23 | 23 | 87.0% | 0 |
| September 2025 | 24 | 24 | 70.8% | 0 |
| October 2025 | 31 | 31 | 77.4% | 0 |
| November 2025 | 12 | 12 | 58.3% | 0 |
| December 2025 | 16 | 16 | 62.5% | 0 |
| January 2026 | 1 | 1 | 100.0% | 0 |
| February 2026 | 1 | 1 | 100.0% | 0 |
| March 2026 | 23 | 23 | 87.0% | 0 |
| April 2026 | 5 | 5 | 80.0% | 0 |
| May 2026 | 1 | 1 | 100.0% | 0 |
| June 2026 | 23 | 23 | 82.6% | 0 |
| July 2026 | 27 | 27 | 88.9% | 0 |