WN1399
WN1399 (Southwest Airlines) is a multi-stop service on 33 routes, busiest Phoenix to Houston. Of 714 departures recorded from October 2024 to July 2026, 75.8% left on time, according to the US BTS.
- On-time departures75.8%of 714 flights
- Average delay10.4 min
- July 202620▼ 53.5%vs July 2025
- Cancelled1.5%
- Legs flown under this number33
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 | 51 | 40 | ▼ 21.6% |
| February | 38 | 47 | ▲ 23.7% |
| March | 33 | 29 | ▼ 12.1% |
| April | 30 | 26 | ▼ 13.3% |
| May | 31 | 26 | ▼ 16.1% |
| June | 42 | 19 | ▼ 54.8% |
| July | 43 | 20 | ▼ 53.5% |
| August | 36 | – | – |
| September | 34 | – | – |
| October | 32 | – | in progress |
| November | 32 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 268 | 207 | ▼ 22.8% |
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 | 81.6% | 85.0% | ▲ 4.1% |
| February | 81.6% | 80.9% | ▼ 0.9% |
| March | 90.9% | 92.9% | ▲ 2.1% |
| April | 82.1% | 80.0% | ▼ 2.6% |
| May | 86.7% | 53.9% | ▼ 37.9% |
| June | 55.0% | 47.4% | ▼ 13.9% |
| July | 44.2% | 55.6% | ▲ 25.7% |
| August | 86.1% | – | – |
| September | 82.4% | – | – |
| October | 81.3% | – | in progress |
| November | 65.6% | – | – |
| December | 74.2% | – | – |
| Year-to-date average (Jan–Jul) | 74.6% | 70.8% | ▼ 5.1% |
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 | 2 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 2 | 1 | ▼ 50.0% |
| May | 1 | 0 | ▼ 100.0% |
| June | 2 | 0 | ▼ 100.0% |
| July | 0 | 2 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 7 | 4 | ▼ 42.9% |
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 98.5% 703
- Cancelled 1.5% 11
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
10Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 13 | 13 | 76.9% | 0 |
| November 2024 | 30 | 30 | 90.0% | 0 |
| December 2024 | 31 | 31 | 80.7% | 0 |
| January 2025 | 51 | 49 | 81.6% | 2 |
| February 2025 | 38 | 38 | 81.6% | 0 |
| March 2025 | 33 | 33 | 90.9% | 0 |
| April 2025 | 30 | 28 | 82.1% | 2 |
| May 2025 | 31 | 30 | 86.7% | 1 |
| June 2025 | 42 | 40 | 55.0% | 2 |
| July 2025 | 43 | 43 | 44.2% | 0 |
| August 2025 | 36 | 36 | 86.1% | 0 |
| September 2025 | 34 | 34 | 82.4% | 0 |
| October 2025 | 32 | 32 | 81.3% | 0 |
| November 2025 | 32 | 32 | 65.6% | 0 |
| December 2025 | 31 | 31 | 74.2% | 0 |
| January 2026 | 40 | 40 | 85.0% | 0 |
| February 2026 | 47 | 47 | 80.9% | 0 |
| March 2026 | 29 | 28 | 92.9% | 1 |
| April 2026 | 26 | 25 | 80.0% | 1 |
| May 2026 | 26 | 26 | 53.9% | 0 |
| June 2026 | 19 | 19 | 47.4% | 0 |
| July 2026 | 20 | 18 | 55.6% | 2 |