WN4211
WN4211 (Southwest Airlines) is a multi-stop service on 13 routes, busiest Seattle to Las Vegas. Of 254 departures recorded from October 2024 to July 2026, 64.1% left on time, according to the US BTS.
- On-time departures64.1%of 254 flights
- Average delay18.9 min
- July 202630
- Cancelled2.4%
- Legs flown under this number13
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 | 30 | 3 | ▼ 90.0% |
| February | 20 | 1 | ▼ 95.0% |
| March | 4 | 10 | ▲ 150.0% |
| April | 23 | 7 | ▼ 69.6% |
| May | 30 | 4 | ▼ 86.7% |
| June | 4 | 27 | ▲ 575.0% |
| July | – | 30 | – |
| August | 3 | – | – |
| September | 4 | – | – |
| October | – | – | in progress |
| November | – | – | – |
| 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 periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 83.3% | 100.0% | ▲ 20.0% |
| February | 80.0% | 0.0% | ▼ 100.0% |
| March | 75.0% | 66.7% | ▼ 11.1% |
| April | 63.6% | 85.7% | ▲ 34.7% |
| May | 46.4% | 100.0% | ▲ 115.4% |
| June | 0.0% | 34.6% | – |
| July | – | 48.3% | – |
| August | 100.0% | – | – |
| September | 100.0% | – | – |
| October | – | – | in progress |
| November | – | – | – |
| 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 periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 2 | 0 | ▼ 100.0% |
| June | 0 | 1 | – |
| July | – | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | – | – | in progress |
| November | – | – | – |
| 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 97.6% 248
- Cancelled 2.4% 6
Share of all recorded flights in the period, all legs. · Oct 31, 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 |
|---|---|---|---|---|
| SEA LAS Seattle–Tacoma International Airport – Harry Reid International Airport | 1,395 | 8.8 min | 76.6% | 107 |
| AUS DEN Austin Bergstrom International Airport – Denver International Airport | 1,249 | 33.2 min | 50.0% | 57 |
| MDW PIT Chicago Midway International Airport – Pittsburgh International Airport | 646 | 29.9 min | 40.7% | 56 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 1 | 1 | 100.0% | 0 |
| November 2024 | 25 | 25 | 72.0% | 0 |
| December 2024 | 28 | 28 | 71.4% | 0 |
| January 2025 | 30 | 30 | 83.3% | 0 |
| February 2025 | 20 | 20 | 80.0% | 0 |
| March 2025 | 4 | 4 | 75.0% | 0 |
| April 2025 | 23 | 22 | 63.6% | 1 |
| May 2025 | 30 | 28 | 46.4% | 2 |
| June 2025 | 4 | 4 | 0.0% | 0 |
| August 2025 | 3 | 3 | 100.0% | 0 |
| September 2025 | 4 | 4 | 100.0% | 0 |
| January 2026 | 3 | 3 | 100.0% | 0 |
| February 2026 | 1 | 1 | 0.0% | 0 |
| March 2026 | 10 | 9 | 66.7% | 1 |
| April 2026 | 7 | 7 | 85.7% | 0 |
| May 2026 | 4 | 4 | 100.0% | 0 |
| June 2026 | 27 | 26 | 34.6% | 1 |
| July 2026 | 30 | 29 | 48.3% | 1 |