WN4308
WN4308 (Southwest Airlines) is a multi-stop service on 17 routes, busiest Salt Lake City to Denver. Of 418 departures recorded from October 2024 to July 2026, 77.5% left on time, according to the US BTS.
- On-time departures77.5%of 418 flights
- Average delay9.9 min
- July 202618▼ 57.1%vs July 2025
- Cancelled1.2%
- Legs flown under this number17
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 | 27 | 12 | ▼ 55.6% |
| February | 24 | 19 | ▼ 20.8% |
| March | 4 | 33 | ▲ 725.0% |
| April | 20 | 6 | ▼ 70.0% |
| May | 25 | – | – |
| June | 42 | 15 | ▼ 64.3% |
| July | 42 | 18 | ▼ 57.1% |
| August | 22 | – | – |
| September | 17 | – | – |
| October | 22 | – | in progress |
| November | 5 | – | – |
| 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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 88.9% | 75.0% | ▼ 15.6% |
| February | 66.7% | 94.7% | ▲ 42.1% |
| March | 50.0% | 78.8% | ▲ 57.6% |
| April | 65.0% | 83.3% | ▲ 28.2% |
| May | 52.0% | – | – |
| June | 90.5% | 40.0% | ▼ 55.8% |
| July | 97.6% | 35.3% | ▼ 63.8% |
| August | 81.8% | – | – |
| September | 88.2% | – | – |
| October | 81.8% | – | in progress |
| November | 80.0% | – | – |
| December | 88.9% | – | – |
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 | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | – | – |
| June | 0 | 0 | – |
| July | 1 | 1 | 0.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 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 98.8% 413
- Cancelled 1.2% 5
Share of all recorded flights in the period, all legs. · Oct 15, 2024 → Jul 29, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SLC DEN Salt Lake City International Airport – Denver International Airport | 628 | 12.2 min | 75.0% | 85 |
| SJC PHX Mineta San Jose International Airport – Phoenix Sky Harbor International Airport | 999 | -2.8 min | 98.3% | 59 |
| DAL MCO Dallas Love Field – Orlando International Airport | 1,564 | 18.6 min | 59.2% | 49 |
| SJC SNA Mineta San Jose International Airport – John Wayne Orange County International Airport | 550 | 4.1 min | 84.4% | 32 |
| PWM BWI Portland International Jetport – Baltimore/Washington International Thurgood Marshall Airport | 727 | 7.1 min | 81.3% | 32 |
| PHX IND Phoenix Sky Harbor International Airport – Indianapolis International Airport | 2,390 | 2.8 min | 93.3% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 6 | 6 | 100.0% | 0 |
| November 2024 | 30 | 29 | 75.9% | 1 |
| December 2024 | 18 | 18 | 72.2% | 0 |
| January 2025 | 27 | 27 | 88.9% | 0 |
| February 2025 | 24 | 24 | 66.7% | 0 |
| March 2025 | 4 | 4 | 50.0% | 0 |
| April 2025 | 20 | 20 | 65.0% | 0 |
| May 2025 | 25 | 25 | 52.0% | 0 |
| June 2025 | 42 | 42 | 90.5% | 0 |
| July 2025 | 42 | 41 | 97.6% | 1 |
| August 2025 | 22 | 22 | 81.8% | 0 |
| September 2025 | 17 | 17 | 88.2% | 0 |
| October 2025 | 22 | 22 | 81.8% | 0 |
| November 2025 | 5 | 5 | 80.0% | 0 |
| December 2025 | 11 | 9 | 88.9% | 2 |
| January 2026 | 12 | 12 | 75.0% | 0 |
| February 2026 | 19 | 19 | 94.7% | 0 |
| March 2026 | 33 | 33 | 78.8% | 0 |
| April 2026 | 6 | 6 | 83.3% | 0 |
| June 2026 | 15 | 15 | 40.0% | 0 |
| July 2026 | 18 | 17 | 35.3% | 1 |