WN4273
WN4273 (Southwest Airlines) is a multi-stop service on 23 routes, busiest San Antonio to Denver. Of 354 departures recorded from October 2024 to July 2026, 76.1% left on time, according to the US BTS.
- On-time departures76.1%of 354 flights
- Average delay9.9 min
- July 202624▲ 100.0%vs July 2025
- Cancelled0.6%
- Legs flown under this number23
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 | 3 | 31 | ▲ 933.3% |
| February | 10 | 28 | ▲ 180.0% |
| March | 24 | 31 | ▲ 29.2% |
| April | 6 | 24 | ▲ 300.0% |
| May | 1 | 22 | ▲ 2,100.0% |
| June | 12 | 21 | ▲ 75.0% |
| July | 12 | 24 | ▲ 100.0% |
| August | 3 | – | – |
| September | – | – | – |
| October | 18 | – | in progress |
| November | 27 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 68 | 181 | ▲ 166.2% |
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 | 66.7% | 80.7% | ▲ 21.0% |
| February | 50.0% | 60.7% | ▲ 21.4% |
| March | 77.3% | 80.7% | ▲ 4.4% |
| April | 50.0% | 87.5% | ▲ 75.0% |
| May | 100.0% | 86.4% | ▼ 13.6% |
| June | 83.3% | 52.4% | ▼ 37.1% |
| July | 75.0% | 25.0% | ▼ 66.7% |
| August | 100.0% | – | – |
| September | – | – | – |
| October | 88.9% | – | in progress |
| November | 100.0% | – | – |
| December | 90.3% | – | – |
| Year-to-date average (Jan–Jul) | 71.8% | 67.6% | ▼ 5.8% |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 2 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 0 | ▼ 100.0% |
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% 352
- Cancelled 0.6% 2
Share of all recorded flights in the period, all legs. · Oct 15, 2024 → Jul 31, 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 |
|---|---|---|---|---|
| SAT DEN San Antonio International Airport – Denver International Airport | 1,280 | -0.5 min | 95.2% | 63 |
| DEN FLL Denver International Airport – Fort Lauderdale Hollywood International Airport | 2,739 | 12.9 min | 69.0% | 58 |
| SJC SNA Mineta San Jose International Airport – John Wayne Orange County International Airport | 550 | -0.6 min | 90.5% | 42 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 12 | 12 | 100.0% | 0 |
| November 2024 | 4 | 4 | 75.0% | 0 |
| December 2024 | 10 | 10 | 80.0% | 0 |
| January 2025 | 3 | 3 | 66.7% | 0 |
| February 2025 | 10 | 10 | 50.0% | 0 |
| March 2025 | 24 | 22 | 77.3% | 2 |
| April 2025 | 6 | 6 | 50.0% | 0 |
| May 2025 | 1 | 1 | 100.0% | 0 |
| June 2025 | 12 | 12 | 83.3% | 0 |
| July 2025 | 12 | 12 | 75.0% | 0 |
| August 2025 | 3 | 3 | 100.0% | 0 |
| October 2025 | 18 | 18 | 88.9% | 0 |
| November 2025 | 27 | 27 | 100.0% | 0 |
| December 2025 | 31 | 31 | 90.3% | 0 |
| January 2026 | 31 | 31 | 80.7% | 0 |
| February 2026 | 28 | 28 | 60.7% | 0 |
| March 2026 | 31 | 31 | 80.7% | 0 |
| April 2026 | 24 | 24 | 87.5% | 0 |
| May 2026 | 22 | 22 | 86.4% | 0 |
| June 2026 | 21 | 21 | 52.4% | 0 |
| July 2026 | 24 | 24 | 25.0% | 0 |