WN4320
WN4320 (Southwest Airlines) is a multi-stop service on 18 routes, busiest Denver to Los Angeles. Of 268 departures recorded from October 2024 to July 2026, 77.1% left on time, according to the US BTS.
- On-time departures77.1%of 268 flights
- Average delay11.4 min
- July 202614▲ 250.0%vs July 2025
- Cancelled0.8%
- Legs flown under this number18
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 25 | 3 | ▼ 88.0% |
| February | 24 | – | – |
| March | 16 | 27 | ▲ 68.8% |
| April | 3 | 27 | ▲ 800.0% |
| May | 4 | 26 | ▲ 550.0% |
| June | 4 | 15 | ▲ 275.0% |
| July | 4 | 14 | ▲ 250.0% |
| August | 1 | – | – |
| September | – | – | – |
| October | 17 | – | in progress |
| November | 6 | – | – |
| December | 11 | – | – |
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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 76.0% | 100.0% | ▲ 31.6% |
| February | 70.8% | – | – |
| March | 81.3% | 74.1% | ▼ 8.8% |
| April | 66.7% | 84.0% | ▲ 26.0% |
| May | 25.0% | 80.8% | ▲ 223.1% |
| June | 50.0% | 86.7% | ▲ 73.3% |
| July | 25.0% | 92.9% | ▲ 271.4% |
| August | 0.0% | – | – |
| September | – | – | – |
| October | 58.8% | – | in progress |
| November | 66.7% | – | – |
| December | 81.8% | – | – |
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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | – | – |
| March | 0 | 0 | – |
| April | 0 | 2 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| 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 99.3% 266
- Cancelled 0.7% 2
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
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN LAX Denver International Airport – Los Angeles International Airport | 1,385 | 11.4 min | 79.7% | 74 |
| SMF BUR Sacramento International Airport – Hollywood Burbank/Bob Hope Airport | 577 | 1.2 min | 85.4% | 50 |
| RNO LAS Reno Tahoe International Airport – Harry Reid International Airport | 556 | 12.4 min | 72.7% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 13 | 13 | 100.0% | 0 |
| November 2024 | 12 | 12 | 75.0% | 0 |
| December 2024 | 16 | 16 | 87.5% | 0 |
| January 2025 | 25 | 25 | 76.0% | 0 |
| February 2025 | 24 | 24 | 70.8% | 0 |
| March 2025 | 16 | 16 | 81.3% | 0 |
| April 2025 | 3 | 3 | 66.7% | 0 |
| May 2025 | 4 | 4 | 25.0% | 0 |
| June 2025 | 4 | 4 | 50.0% | 0 |
| July 2025 | 4 | 4 | 25.0% | 0 |
| August 2025 | 1 | 1 | 0.0% | 0 |
| October 2025 | 17 | 17 | 58.8% | 0 |
| November 2025 | 6 | 6 | 66.7% | 0 |
| December 2025 | 11 | 11 | 81.8% | 0 |
| January 2026 | 3 | 3 | 100.0% | 0 |
| March 2026 | 27 | 27 | 74.1% | 0 |
| April 2026 | 27 | 25 | 84.0% | 2 |
| May 2026 | 26 | 26 | 80.8% | 0 |
| June 2026 | 15 | 15 | 86.7% | 0 |
| July 2026 | 14 | 14 | 92.9% | 0 |