WN459
WN459 (Southwest Airlines) is a multi-stop service on 44 routes, busiest Chicago to Las Vegas. Of 802 departures recorded from October 2024 to July 2026, 71.8% left on time, according to the US BTS.
- On-time departures71.8%of 802 flights
- Average delay19.2 min
- July 202639▼ 11.4%vs July 2025
- Cancelled1.3%
- Legs flown under this number44
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 35 | 50 | ▲ 42.9% |
| February | 28 | 34 | ▲ 21.4% |
| March | 39 | 37 | ▼ 5.1% |
| April | 28 | 34 | ▲ 21.4% |
| May | 20 | 36 | ▲ 80.0% |
| June | 43 | 38 | ▼ 11.6% |
| July | 44 | 39 | ▼ 11.4% |
| August | 16 | – | – |
| September | 8 | – | – |
| October | 65 | – | in progress |
| November | 31 | – | – |
| December | 40 | – | – |
| Year to date (Jan–Jul) | 237 | 268 | ▲ 13.1% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
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 | 84.9% | 85.4% | ▲ 0.7% |
| February | 82.1% | 87.5% | ▲ 6.5% |
| March | 76.3% | 67.6% | ▼ 11.5% |
| April | 75.0% | 67.7% | ▼ 9.8% |
| May | 65.0% | 16.7% | ▼ 74.4% |
| June | 65.1% | 34.2% | ▼ 47.5% |
| July | 66.7% | 38.5% | ▼ 42.3% |
| August | 87.5% | – | – |
| September | 75.0% | – | – |
| October | 90.8% | – | in progress |
| November | 74.2% | – | – |
| December | 75.0% | – | – |
| Year-to-date average (Jan–Jul) | 73.6% | 56.8% | ▼ 22.8% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 2 | 0.0% |
| February | 0 | 2 | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 2 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 5 | 4 | ▼ 20.0% |
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 98.8% 792
- Cancelled 1.2% 10
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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| MDW LAS Chicago Midway International Airport – Harry Reid International Airport | 2,442 | 15.4 min | 80.0% | 75 |
| BNA BOS Nashville International Airport – Boston Logan International Airport | 1,514 | 49.6 min | 37.9% | 58 |
| AUS TPA Austin Bergstrom International Airport – Tampa International Airport | 1,490 | 39.0 min | 36.2% | 58 |
| BNA BWI Nashville International Airport – Baltimore/Washington International Thurgood Marshall Airport | 944 | -0.1 min | 94.1% | 55 |
| STL ATL St. Louis Lambert International Airport – Hartsfield Jackson Atlanta International Airport | 779 | 18.1 min | 76.2% | 43 |
| SMF SAN Sacramento International Airport – San Diego International Airport | 773 | 7.2 min | 92.9% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 32 | 32 | 96.9% | 0 |
| November 2024 | 58 | 58 | 86.2% | 0 |
| December 2024 | 47 | 46 | 76.1% | 1 |
| January 2025 | 35 | 33 | 84.9% | 2 |
| February 2025 | 28 | 28 | 82.1% | 0 |
| March 2025 | 39 | 38 | 76.3% | 1 |
| April 2025 | 28 | 28 | 75.0% | 0 |
| May 2025 | 20 | 20 | 65.0% | 0 |
| June 2025 | 43 | 43 | 65.1% | 0 |
| July 2025 | 44 | 42 | 66.7% | 2 |
| August 2025 | 16 | 16 | 87.5% | 0 |
| September 2025 | 8 | 8 | 75.0% | 0 |
| October 2025 | 65 | 65 | 90.8% | 0 |
| November 2025 | 31 | 31 | 74.2% | 0 |
| December 2025 | 40 | 40 | 75.0% | 0 |
| January 2026 | 50 | 48 | 85.4% | 2 |
| February 2026 | 34 | 32 | 87.5% | 2 |
| March 2026 | 37 | 37 | 67.6% | 0 |
| April 2026 | 34 | 34 | 67.7% | 0 |
| May 2026 | 36 | 36 | 16.7% | 0 |
| June 2026 | 38 | 38 | 34.2% | 0 |
| July 2026 | 39 | 39 | 38.5% | 0 |