WN3321
WN3321 (Southwest Airlines) is a multi-stop service on 22 routes, busiest Chicago to Sacramento. Of 424 departures recorded from October 2024 to July 2026, 68.6% left on time, according to the US BTS.
- On-time departures68.6%of 424 flights
- Average delay14.4 min
- July 20265▼ 83.9%vs July 2025
- Cancelled0.9%
- Legs flown under this number22
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 25 | 2 | ▼ 92.0% |
| February | 20 | 10 | ▼ 50.0% |
| March | 10 | 56 | ▲ 460.0% |
| April | 19 | 23 | ▲ 21.1% |
| May | 23 | 13 | ▼ 43.5% |
| June | 29 | 5 | ▼ 82.8% |
| July | 31 | 5 | ▼ 83.9% |
| August | 39 | – | – |
| September | 39 | – | – |
| October | 28 | – | in progress |
| November | 24 | – | – |
| December | 20 | – | – |
| Year to date (Jan–Jul) | 157 | 114 | ▼ 27.4% |
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 periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 75.0% | 100.0% | ▲ 33.3% |
| February | 80.0% | 100.0% | ▲ 25.0% |
| March | 100.0% | 61.8% | ▼ 38.2% |
| April | 94.7% | 73.9% | ▼ 22.0% |
| May | 78.3% | 30.8% | ▼ 60.7% |
| June | 37.9% | 100.0% | ▲ 163.6% |
| July | 32.3% | 20.0% | ▼ 38.0% |
| August | 60.5% | – | – |
| September | 82.1% | – | – |
| October | 60.7% | – | in progress |
| November | 87.5% | – | – |
| December | 95.0% | – | – |
| Year-to-date average (Jan–Jul) | 71.2% | 69.5% | ▼ 2.3% |
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 periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 0 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 2 | ▲ 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 99.1% 420
- Cancelled 0.9% 4
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 26, 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 |
|---|---|---|---|---|
| MDW SMF Chicago Midway International Airport – Sacramento International Airport | 2,874 | 32.3 min | 31.7% | 60 |
| MCI MDW Kansas City International Airport – Chicago Midway International Airport | 650 | 11.8 min | 71.9% | 58 |
| LAS SJC Harry Reid International Airport – Mineta San Jose International Airport | 620 | -0.2 min | 91.3% | 46 |
| PWM BWI Portland International Jetport – Baltimore/Washington International Thurgood Marshall Airport | 727 | 7.9 min | 85.7% | 42 |
| DCA MDW Ronald Reagan Washington National Airport – Chicago Midway International Airport | 964 | 20.4 min | 71.9% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 3 | 3 | 100.0% | 0 |
| January 2025 | 25 | 24 | 75.0% | 1 |
| February 2025 | 20 | 20 | 80.0% | 0 |
| March 2025 | 10 | 10 | 100.0% | 0 |
| April 2025 | 19 | 19 | 94.7% | 0 |
| May 2025 | 23 | 23 | 78.3% | 0 |
| June 2025 | 29 | 29 | 37.9% | 0 |
| July 2025 | 31 | 31 | 32.3% | 0 |
| August 2025 | 39 | 38 | 60.5% | 1 |
| September 2025 | 39 | 39 | 82.1% | 0 |
| October 2025 | 28 | 28 | 60.7% | 0 |
| November 2025 | 24 | 24 | 87.5% | 0 |
| December 2025 | 20 | 20 | 95.0% | 0 |
| January 2026 | 2 | 2 | 100.0% | 0 |
| February 2026 | 10 | 10 | 100.0% | 0 |
| March 2026 | 56 | 55 | 61.8% | 1 |
| April 2026 | 23 | 23 | 73.9% | 0 |
| May 2026 | 13 | 13 | 30.8% | 0 |
| June 2026 | 5 | 4 | 100.0% | 1 |
| July 2026 | 5 | 5 | 20.0% | 0 |