WN3901
WN3901 (Southwest Airlines) is a multi-stop service on 28 routes, busiest San Diego to San Antonio. Of 379 departures recorded from October 2024 to July 2026, 80.0% left on time, according to the US BTS.
- On-time departures80.0%of 379 flights
- Average delay9.5 min
- July 202616▼ 30.4%vs July 2025
- Cancelled1.1%
- Legs flown under this number28
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 | 21 | 25 | ▲ 19.0% |
| February | 9 | 27 | ▲ 200.0% |
| March | 68 | 8 | ▼ 88.2% |
| April | 20 | 4 | ▼ 80.0% |
| May | 5 | 9 | ▲ 80.0% |
| June | 22 | 16 | ▼ 27.3% |
| July | 23 | 16 | ▼ 30.4% |
| August | 4 | – | – |
| September | – | – | – |
| October | 4 | – | in progress |
| November | 24 | – | – |
| December | 21 | – | – |
| Year to date (Jan–Jul) | 168 | 105 | ▼ 37.5% |
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 | 85.7% | 70.8% | ▼ 17.4% |
| February | 88.9% | 88.9% | 0.0% |
| March | 75.0% | 85.7% | ▲ 14.3% |
| April | 75.0% | 75.0% | 0.0% |
| May | 80.0% | 44.4% | ▼ 44.5% |
| June | 86.4% | 81.3% | ▼ 5.9% |
| July | 78.3% | 81.3% | ▲ 3.8% |
| August | 100.0% | – | – |
| September | – | – | – |
| October | 100.0% | – | in progress |
| November | 75.0% | – | – |
| December | 75.0% | – | – |
| Year-to-date average (Jan–Jul) | 81.3% | 75.3% | ▼ 7.4% |
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 | 0 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 0 | 2 |
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 98.9% 375
- Cancelled 1.1% 4
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 29, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SAN SAT San Diego International Airport – San Antonio International Airport | 1,814 | 12.2 min | 80.7% | 57 |
| MSY MDW Louis Armstrong New Orleans International Airport – Chicago Midway International Airport | 1,331 | 8.6 min | 84.4% | 45 |
| STL TUL St. Louis Lambert International Airport – Tulsa International Airport | 563 | 7.5 min | 75.6% | 42 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 19 | 19 | 89.5% | 0 |
| December 2024 | 14 | 14 | 85.7% | 0 |
| January 2025 | 21 | 21 | 85.7% | 0 |
| February 2025 | 9 | 9 | 88.9% | 0 |
| March 2025 | 68 | 68 | 75.0% | 0 |
| April 2025 | 20 | 20 | 75.0% | 0 |
| May 2025 | 5 | 5 | 80.0% | 0 |
| June 2025 | 22 | 22 | 86.4% | 0 |
| July 2025 | 23 | 23 | 78.3% | 0 |
| August 2025 | 4 | 4 | 100.0% | 0 |
| October 2025 | 4 | 3 | 100.0% | 1 |
| November 2025 | 24 | 24 | 75.0% | 0 |
| December 2025 | 21 | 20 | 75.0% | 1 |
| January 2026 | 25 | 24 | 70.8% | 1 |
| February 2026 | 27 | 27 | 88.9% | 0 |
| March 2026 | 8 | 7 | 85.7% | 1 |
| April 2026 | 4 | 4 | 75.0% | 0 |
| May 2026 | 9 | 9 | 44.4% | 0 |
| June 2026 | 16 | 16 | 81.3% | 0 |
| July 2026 | 16 | 16 | 81.3% | 0 |