WN4340
WN4340 (Southwest Airlines) is a multi-stop service on 16 routes, busiest San Antonio to Los Angeles. Of 308 departures recorded from November 2024 to July 2026, 73.7% left on time, according to the US BTS.
- On-time departures73.7%of 308 flights
- Average delay12.5 min
- July 202627▲ 575.0%vs July 2025
- Cancelled0.0%
- Legs flown under this number16
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 | 3 | ▼ 89.3% |
| February | 24 | 7 | ▼ 70.8% |
| March | 4 | 40 | ▲ 900.0% |
| April | 3 | 9 | ▲ 200.0% |
| May | 4 | 1 | ▼ 75.0% |
| June | 5 | 23 | ▲ 360.0% |
| July | 4 | 27 | ▲ 575.0% |
| August | 32 | – | – |
| September | 35 | – | – |
| October | 2 | – | in progress |
| November | 5 | – | – |
| December | 11 | – | – |
| Year to date (Jan–Jul) | 72 | 110 | ▲ 52.8% |
according to the US BTS · November 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 | 60.7% | 100.0% | ▲ 64.7% |
| February | 83.3% | 57.1% | ▼ 31.4% |
| March | 50.0% | 82.5% | ▲ 65.0% |
| April | 66.7% | 66.7% | 0.0% |
| May | 100.0% | 100.0% | 0.0% |
| June | 100.0% | 39.1% | ▼ 60.9% |
| July | 100.0% | 37.0% | ▼ 63.0% |
| August | 84.4% | – | – |
| September | 91.4% | – | – |
| October | 100.0% | – | in progress |
| November | 100.0% | – | – |
| December | 81.8% | – | – |
| Year-to-date average (Jan–Jul) | 80.1% | 68.9% | ▼ 14.0% |
according to the US BTS · November 2024 → July 2026
Average departure delay by month
according to the US BTS · November 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 0 |
according to the US BTS · November 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 100.0% 308
- Cancelled 0.0% 0
Share of all recorded flights in the period, all legs. · Nov 3, 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 |
|---|---|---|---|---|
| TPA STL Tampa International Airport – St. Louis Lambert International Airport | 1,400 | 7.7 min | 88.0% | 50 |
| SAT LAX San Antonio International Airport – Los Angeles International Airport | 1,945 | 13.3 min | 70.0% | 50 |
| LAS ELP Harry Reid International Airport – El Paso International Airport | 938 | 32.8 min | 38.1% | 42 |
| HOU MEM William P. Hobby Airport – Frederick W. Smith International Airport | 780 | 6.6 min | 80.0% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| November 2024 | 19 | 19 | 89.5% | 0 |
| December 2024 | 22 | 22 | 68.2% | 0 |
| January 2025 | 28 | 28 | 60.7% | 0 |
| February 2025 | 24 | 24 | 83.3% | 0 |
| March 2025 | 4 | 4 | 50.0% | 0 |
| April 2025 | 3 | 3 | 66.7% | 0 |
| May 2025 | 4 | 4 | 100.0% | 0 |
| June 2025 | 5 | 5 | 100.0% | 0 |
| July 2025 | 4 | 4 | 100.0% | 0 |
| August 2025 | 32 | 32 | 84.4% | 0 |
| September 2025 | 35 | 35 | 91.4% | 0 |
| October 2025 | 2 | 2 | 100.0% | 0 |
| November 2025 | 5 | 5 | 100.0% | 0 |
| December 2025 | 11 | 11 | 81.8% | 0 |
| January 2026 | 3 | 3 | 100.0% | 0 |
| February 2026 | 7 | 7 | 57.1% | 0 |
| March 2026 | 40 | 40 | 82.5% | 0 |
| April 2026 | 9 | 9 | 66.7% | 0 |
| May 2026 | 1 | 1 | 100.0% | 0 |
| June 2026 | 23 | 23 | 39.1% | 0 |
| July 2026 | 27 | 27 | 37.0% | 0 |