WN644
WN644 (Southwest Airlines) is a multi-stop service on 48 routes, busiest Austin to Midland. Of 790 departures recorded from October 2024 to July 2026, 69.8% left on time, according to the US BTS.
- On-time departures69.8%of 790 flights
- Average delay17.0 min
- July 202670▲ 159.3%vs July 2025
- Cancelled0.6%
- Legs flown under this number48
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 32 | 29 | ▼ 9.4% |
| February | 35 | 28 | ▼ 20.0% |
| March | 32 | 43 | ▲ 34.4% |
| April | 47 | 24 | ▼ 48.9% |
| May | 53 | 23 | ▼ 56.6% |
| June | 29 | 61 | ▲ 110.3% |
| July | 27 | 70 | ▲ 159.3% |
| August | 36 | – | – |
| September | 34 | – | – |
| October | 57 | – | in progress |
| November | 19 | – | – |
| December | 15 | – | – |
| Year to date (Jan–Jul) | 255 | 278 | ▲ 9.0% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 93.6% | 86.2% | ▼ 7.8% |
| February | 88.6% | 75.0% | ▼ 15.3% |
| March | 93.8% | 31.0% | ▼ 67.0% |
| April | 73.3% | 62.5% | ▼ 14.8% |
| May | 49.1% | 78.3% | ▲ 59.5% |
| June | 51.7% | 67.2% | ▲ 29.9% |
| July | 48.2% | 52.2% | ▲ 8.3% |
| August | 88.9% | – | – |
| September | 91.2% | – | – |
| October | 68.4% | – | in progress |
| November | 57.9% | – | – |
| December | 73.3% | – | – |
| Year-to-date average (Jan–Jul) | 71.2% | 64.6% | ▼ 9.2% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 2 | 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) | 3 | 2 | ▼ 33.3% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.4% 785
- Cancelled 0.6% 5
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
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| AUS MAF Austin Bergstrom International Airport – Midland International Air and Space Port | 474 | 12.3 min | 76.1% | 88 |
| MDW FLL Chicago Midway International Airport – Fort Lauderdale Hollywood International Airport | 1,881 | 9.5 min | 81.0% | 58 |
| DEN DAL Denver International Airport – Dallas Love Field | 1,048 | 22.3 min | 65.9% | 42 |
| BNA LAS Nashville International Airport – Harry Reid International Airport | 2,549 | -1.3 min | 97.6% | 42 |
| DAL SFO Dallas Love Field – San Francisco International Airport | 2,371 | 12.6 min | 75.0% | 40 |
| BNA AUS Nashville International Airport – Austin Bergstrom International Airport | 1,215 | 20.4 min | 62.9% | 35 |
| BWI MIA Baltimore/Washington International Thurgood Marshall Airport – Miami International Airport | 1,526 | -0.3 min | 97.0% | 33 |
| ORF BWI Norfolk International Airport – Baltimore/Washington International Thurgood Marshall Airport | 257 | 22.8 min | 63.3% | 32 |
| DAL BNA Dallas Love Field – Nashville International Airport | 1,000 | 26.1 min | 41.9% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 23 | 23 | 82.6% | 0 |
| November 2024 | 40 | 40 | 90.0% | 0 |
| December 2024 | 33 | 33 | 69.7% | 0 |
| January 2025 | 32 | 31 | 93.6% | 1 |
| February 2025 | 35 | 35 | 88.6% | 0 |
| March 2025 | 32 | 32 | 93.8% | 0 |
| April 2025 | 47 | 45 | 73.3% | 2 |
| May 2025 | 53 | 53 | 49.1% | 0 |
| June 2025 | 29 | 29 | 51.7% | 0 |
| July 2025 | 27 | 27 | 48.2% | 0 |
| August 2025 | 36 | 36 | 88.9% | 0 |
| September 2025 | 34 | 34 | 91.2% | 0 |
| October 2025 | 57 | 57 | 68.4% | 0 |
| November 2025 | 19 | 19 | 57.9% | 0 |
| December 2025 | 15 | 15 | 73.3% | 0 |
| January 2026 | 29 | 29 | 86.2% | 0 |
| February 2026 | 28 | 28 | 75.0% | 0 |
| March 2026 | 43 | 42 | 31.0% | 1 |
| April 2026 | 24 | 24 | 62.5% | 0 |
| May 2026 | 23 | 23 | 78.3% | 0 |
| June 2026 | 61 | 61 | 67.2% | 0 |
| July 2026 | 70 | 69 | 52.2% | 1 |