WN1921
WN1921 (Southwest Airlines) is a multi-stop service on 28 routes, busiest Harlingen to Houston. Of 792 departures recorded from October 2024 to July 2026, 80.1% left on time, according to the US BTS.
- On-time departures80.1%of 792 flights
- Average delay10.6 min
- July 202631▲ 3.3%vs July 2025
- Cancelled0.6%
- Legs flown under this number28
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 | 28 | 48 | ▲ 71.4% |
| February | 24 | 37 | ▲ 54.2% |
| March | 30 | 30 | 0.0% |
| April | 55 | 36 | ▼ 34.5% |
| May | 61 | 39 | ▼ 36.1% |
| June | 35 | 30 | ▼ 14.3% |
| July | 30 | 31 | ▲ 3.3% |
| August | 23 | – | – |
| September | 22 | – | – |
| October | 96 | – | in progress |
| November | 28 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 263 | 251 | ▼ 4.6% |
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 | 85.2% | 91.3% | ▲ 7.2% |
| February | 100.0% | 81.1% | ▼ 18.9% |
| March | 83.3% | 66.7% | ▼ 20.0% |
| April | 87.3% | 72.2% | ▼ 17.2% |
| May | 88.3% | 61.5% | ▼ 30.3% |
| June | 68.6% | 93.3% | ▲ 36.1% |
| July | 56.7% | 100.0% | ▲ 76.5% |
| August | 91.3% | – | – |
| September | 77.3% | – | – |
| October | 54.2% | – | in progress |
| November | 85.2% | – | – |
| December | 86.2% | – | – |
| Year-to-date average (Jan–Jul) | 81.3% | 80.9% | ▼ 0.6% |
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 | 1 | 2 | ▲ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 2 | 0.0% |
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 99.4% 787
- 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
10Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 30 | 30 | 93.3% | 0 |
| December 2024 | 30 | 30 | 96.7% | 0 |
| January 2025 | 28 | 27 | 85.2% | 1 |
| February 2025 | 24 | 24 | 100.0% | 0 |
| March 2025 | 30 | 30 | 83.3% | 0 |
| April 2025 | 55 | 55 | 87.3% | 0 |
| May 2025 | 61 | 60 | 88.3% | 1 |
| June 2025 | 35 | 35 | 68.6% | 0 |
| July 2025 | 30 | 30 | 56.7% | 0 |
| August 2025 | 23 | 23 | 91.3% | 0 |
| September 2025 | 22 | 22 | 77.3% | 0 |
| October 2025 | 96 | 96 | 54.2% | 0 |
| November 2025 | 28 | 27 | 85.2% | 1 |
| December 2025 | 29 | 29 | 86.2% | 0 |
| January 2026 | 48 | 46 | 91.3% | 2 |
| February 2026 | 37 | 37 | 81.1% | 0 |
| March 2026 | 30 | 30 | 66.7% | 0 |
| April 2026 | 36 | 36 | 72.2% | 0 |
| May 2026 | 39 | 39 | 61.5% | 0 |
| June 2026 | 30 | 30 | 93.3% | 0 |
| July 2026 | 31 | 31 | 100.0% | 0 |