WN3664
WN3664 (Southwest Airlines) is a multi-stop service on 25 routes, busiest Houston to Nashville. Of 435 departures recorded from October 2024 to July 2026, 79.6% left on time, according to the US BTS.
- On-time departures79.6%of 435 flights
- Average delay9.7 min
- July 202628▲ 86.7%vs July 2025
- Cancelled0.9%
- Legs flown under this number25
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 | 5 | 31 | ▲ 520.0% |
| February | 12 | 28 | ▲ 133.3% |
| March | 24 | 8 | ▼ 66.7% |
| April | 29 | 22 | ▼ 24.1% |
| May | 31 | 22 | ▼ 29.0% |
| June | 14 | 27 | ▲ 92.9% |
| July | 15 | 28 | ▲ 86.7% |
| August | 3 | – | – |
| September | – | – | – |
| October | 72 | – | in progress |
| November | 20 | – | – |
| December | 18 | – | – |
| Year to date (Jan–Jul) | 130 | 166 | ▲ 27.7% |
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% | 87.1% | ▲ 74.2% |
| February | 75.0% | 96.4% | ▲ 28.6% |
| March | 70.8% | 57.1% | ▼ 19.3% |
| April | 72.4% | 100.0% | ▲ 38.1% |
| May | 58.1% | 90.5% | ▲ 55.8% |
| June | 92.9% | 57.7% | ▼ 37.9% |
| July | 80.0% | 85.7% | ▲ 7.1% |
| August | 100.0% | – | – |
| September | – | – | – |
| October | 77.8% | – | in progress |
| November | 95.0% | – | – |
| December | 77.8% | – | – |
| Year-to-date average (Jan–Jul) | 71.3% | 82.1% | ▲ 15.1% |
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 | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 1 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 3 | ▲ 200.0% |
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 99.1% 431
- Cancelled 0.9% 4
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| HOU BNA William P. Hobby Airport – Nashville International Airport | 1,078 | 20.5 min | 67.2% | 61 |
| SMF PHX Sacramento International Airport – Phoenix Sky Harbor International Airport | 1,040 | -0.3 min | 96.6% | 58 |
| ONT PHX Ontario International Airport – Phoenix Sky Harbor International Airport | 522 | 2.5 min | 95.2% | 42 |
| STL DEN St. Louis Lambert International Airport – Denver International Airport | 1,236 | 10.0 min | 83.8% | 37 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 6 | 6 | 66.7% | 0 |
| November 2024 | 14 | 14 | 92.9% | 0 |
| December 2024 | 6 | 6 | 66.7% | 0 |
| January 2025 | 5 | 4 | 50.0% | 1 |
| February 2025 | 12 | 12 | 75.0% | 0 |
| March 2025 | 24 | 24 | 70.8% | 0 |
| April 2025 | 29 | 29 | 72.4% | 0 |
| May 2025 | 31 | 31 | 58.1% | 0 |
| June 2025 | 14 | 14 | 92.9% | 0 |
| July 2025 | 15 | 15 | 80.0% | 0 |
| August 2025 | 3 | 3 | 100.0% | 0 |
| October 2025 | 72 | 72 | 77.8% | 0 |
| November 2025 | 20 | 20 | 95.0% | 0 |
| December 2025 | 18 | 18 | 77.8% | 0 |
| January 2026 | 31 | 31 | 87.1% | 0 |
| February 2026 | 28 | 28 | 96.4% | 0 |
| March 2026 | 8 | 7 | 57.1% | 1 |
| April 2026 | 22 | 22 | 100.0% | 0 |
| May 2026 | 22 | 21 | 90.5% | 1 |
| June 2026 | 27 | 26 | 57.7% | 1 |
| July 2026 | 28 | 28 | 85.7% | 0 |