WN4646
WN4646 (Southwest Airlines) is a multi-stop service on 15 routes, busiest Las Vegas to Chicago. Of 377 departures recorded from October 2024 to July 2026, 72.9% left on time, according to the US BTS.
- On-time departures72.9%of 377 flights
- Average delay18.4 min
- July 202626
- Cancelled1.1%
- 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 periods15 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 59 | – |
| February | – | 53 | – |
| March | – | 8 | – |
| April | 3 | 34 | ▲ 1,033.3% |
| May | 3 | 43 | ▲ 1,333.3% |
| June | 1 | 27 | ▲ 2,600.0% |
| July | – | 26 | – |
| August | 3 | – | – |
| September | 4 | – | – |
| October | 42 | – | in progress |
| November | 31 | – | – |
| December | 21 | – | – |
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 | – | 74.6% | – |
| February | – | 52.8% | – |
| March | – | 50.0% | – |
| April | 100.0% | 76.5% | ▼ 23.5% |
| May | 100.0% | 81.4% | ▼ 18.6% |
| June | 100.0% | 96.3% | ▼ 3.7% |
| July | – | 88.0% | – |
| August | 0.0% | – | – |
| September | 50.0% | – | – |
| October | 67.5% | – | in progress |
| November | 70.0% | – | – |
| December | 76.2% | – | – |
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 | – |
| February | – | 0 | – |
| March | – | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 2 | – | in progress |
| November | 1 | – | – |
| December | 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 98.9% 373
- Cancelled 1.1% 4
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 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 |
|---|---|---|---|---|
| LAS ORD Harry Reid International Airport – Chicago O'Hare International Airport | 2,432 | 26.9 min | 56.9% | 58 |
| ORD LAS Chicago O'Hare International Airport – Harry Reid International Airport | 2,432 | 22.0 min | 87.7% | 57 |
| ISP MCO Long Island MacArthur Airport – Orlando International Airport | 1,565 | 5.8 min | 91.7% | 49 |
| BUR LAS Hollywood Burbank/Bob Hope Airport – Harry Reid International Airport | 359 | 16.9 min | 65.7% | 35 |
| MCO ATL Orlando International Airport – Hartsfield Jackson Atlanta International Airport | 651 | 27.3 min | 64.3% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 70.6% | 0 |
| November 2024 | 1 | 1 | 100.0% | 0 |
| December 2024 | 1 | 1 | 100.0% | 0 |
| April 2025 | 3 | 3 | 100.0% | 0 |
| May 2025 | 3 | 3 | 100.0% | 0 |
| June 2025 | 1 | 1 | 100.0% | 0 |
| August 2025 | 3 | 3 | 0.0% | 0 |
| September 2025 | 4 | 4 | 50.0% | 0 |
| October 2025 | 42 | 40 | 67.5% | 2 |
| November 2025 | 31 | 30 | 70.0% | 1 |
| December 2025 | 21 | 21 | 76.2% | 0 |
| January 2026 | 59 | 59 | 74.6% | 0 |
| February 2026 | 53 | 53 | 52.8% | 0 |
| March 2026 | 8 | 8 | 50.0% | 0 |
| April 2026 | 34 | 34 | 76.5% | 0 |
| May 2026 | 43 | 43 | 81.4% | 0 |
| June 2026 | 27 | 27 | 96.3% | 0 |
| July 2026 | 26 | 25 | 88.0% | 1 |