WN3821
WN3821 (Southwest Airlines) is a multi-stop service on 15 routes, busiest Phoenix to Salt Lake City. Of 397 departures recorded from October 2024 to July 2026, 74.6% left on time, according to the US BTS.
- On-time departures74.6%of 397 flights
- Average delay13.7 min
- July 202627
- Cancelled0.8%
- Legs flown under this number15
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods14 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 27 | – | – |
| February | 28 | 7 | ▼ 75.0% |
| March | 49 | 40 | ▼ 18.4% |
| April | 27 | 33 | ▲ 22.2% |
| May | 23 | 31 | ▲ 34.8% |
| June | 2 | 26 | ▲ 1,200.0% |
| July | – | 27 | – |
| August | – | – | – |
| September | – | – | – |
| October | 38 | – | in progress |
| November | 1 | – | – |
| December | – | – | – |
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 periods14 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 88.9% | – | – |
| February | 89.3% | 71.4% | ▼ 20.0% |
| March | 95.8% | 71.8% | ▼ 25.1% |
| April | 96.3% | 97.0% | ▲ 0.7% |
| May | 56.5% | 90.3% | ▲ 59.8% |
| June | 100.0% | 23.1% | ▼ 76.9% |
| July | – | 26.9% | – |
| August | – | – | – |
| September | – | – | – |
| October | 65.8% | – | in progress |
| November | 0.0% | – | – |
| December | – | – | – |
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 periods14 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | – | – |
| February | 0 | 0 | – |
| March | 1 | 1 | 0.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 1 | – |
| August | – | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | – | – | – |
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 99.2% 394
- Cancelled 0.8% 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
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PHX SLC Phoenix Sky Harbor International Airport – Salt Lake City International Airport | 818 | 7.0 min | 82.0% | 61 |
| PHX MDW Phoenix Sky Harbor International Airport – Chicago Midway International Airport | 2,319 | 4.5 min | 94.8% | 58 |
| DEN EUG Denver International Airport – Eugene Airport | 1,600 | 51.8 min | 20.4% | 50 |
| MKE BWI General Mitchell International Airport – Baltimore/Washington International Thurgood Marshall Airport | 1,030 | 14.6 min | 75.0% | 40 |
| SAN SMF San Diego International Airport – Sacramento International Airport | 773 | -0.9 min | 100.0% | 33 |
| CLE LAS Cleveland Hopkins International Airport – Harry Reid International Airport | 2,929 | 12.5 min | 75.0% | 33 |
| BNA MSY Nashville International Airport – Louis Armstrong New Orleans International Airport | 759 | 15.7 min | 67.7% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 7 | 7 | 71.4% | 0 |
| November 2024 | 17 | 17 | 76.5% | 0 |
| December 2024 | 14 | 14 | 64.3% | 0 |
| January 2025 | 27 | 27 | 88.9% | 0 |
| February 2025 | 28 | 28 | 89.3% | 0 |
| March 2025 | 49 | 48 | 95.8% | 1 |
| April 2025 | 27 | 27 | 96.3% | 0 |
| May 2025 | 23 | 23 | 56.5% | 0 |
| June 2025 | 2 | 2 | 100.0% | 0 |
| October 2025 | 38 | 38 | 65.8% | 0 |
| November 2025 | 1 | 1 | 0.0% | 0 |
| February 2026 | 7 | 7 | 71.4% | 0 |
| March 2026 | 40 | 39 | 71.8% | 1 |
| April 2026 | 33 | 33 | 97.0% | 0 |
| May 2026 | 31 | 31 | 90.3% | 0 |
| June 2026 | 26 | 26 | 23.1% | 0 |
| July 2026 | 27 | 26 | 26.9% | 1 |