WN4491
WN4491 (Southwest Airlines) is a multi-stop service on 14 routes, busiest San Jose to Denver. Of 301 departures recorded from October 2024 to July 2026, 60.1% left on time, according to the US BTS.
- On-time departures60.1%of 301 flights
- Average delay25.0 min
- July 202614▼ 53.3%vs July 2025
- Cancelled1.0%
- Legs flown under this number14
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods15 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 3 | ▲ 50.0% |
| February | 8 | – | – |
| March | 27 | – | – |
| April | 27 | – | – |
| May | 26 | – | – |
| June | 30 | 12 | ▼ 60.0% |
| July | 30 | 14 | ▼ 53.3% |
| August | 22 | – | – |
| September | 21 | – | – |
| October | 13 | – | in progress |
| November | 27 | – | – |
| December | 22 | – | – |
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 periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 100.0% | 33.3% | ▼ 66.7% |
| February | 87.5% | – | – |
| March | 74.1% | – | – |
| April | 63.0% | – | – |
| May | 50.0% | – | – |
| June | 73.3% | 25.0% | ▼ 65.9% |
| July | 66.7% | 14.3% | ▼ 78.6% |
| August | 45.0% | – | – |
| September | 66.7% | – | – |
| October | 53.9% | – | in progress |
| November | 73.1% | – | – |
| December | 59.1% | – | – |
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 periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | – | – |
| March | 0 | – | – |
| April | 0 | – | – |
| May | 0 | – | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 2 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 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 99.0% 298
- Cancelled 1.0% 3
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SJC DEN Mineta San Jose International Airport – Denver International Airport | 1,522 | 20.2 min | 70.0% | 60 |
| LGA DEN LaGuardia Airport – Denver International Airport | 2,600 | 36.5 min | 56.0% | 50 |
| LAS OAK Harry Reid International Airport – Oakland San Francisco Bay Airport | 654 | 20.3 min | 62.2% | 46 |
| STL MCO St. Louis Lambert International Airport – Orlando International Airport | 1,420 | 14.3 min | 72.7% | 33 |
| MSY STL Louis Armstrong New Orleans International Airport – St. Louis Lambert International Airport | 974 | 23.2 min | 58.1% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 6 | 6 | 83.3% | 0 |
| November 2024 | 2 | 2 | 50.0% | 0 |
| December 2024 | 9 | 9 | 44.4% | 0 |
| January 2025 | 2 | 2 | 100.0% | 0 |
| February 2025 | 8 | 8 | 87.5% | 0 |
| March 2025 | 27 | 27 | 74.1% | 0 |
| April 2025 | 27 | 27 | 63.0% | 0 |
| May 2025 | 26 | 26 | 50.0% | 0 |
| June 2025 | 30 | 30 | 73.3% | 0 |
| July 2025 | 30 | 30 | 66.7% | 0 |
| August 2025 | 22 | 20 | 45.0% | 2 |
| September 2025 | 21 | 21 | 66.7% | 0 |
| October 2025 | 13 | 13 | 53.9% | 0 |
| November 2025 | 27 | 26 | 73.1% | 1 |
| December 2025 | 22 | 22 | 59.1% | 0 |
| January 2026 | 3 | 3 | 33.3% | 0 |
| June 2026 | 12 | 12 | 25.0% | 0 |
| July 2026 | 14 | 14 | 14.3% | 0 |