WN4034
WN4034 (Southwest Airlines) is a multi-stop service on 25 routes, busiest Kansas City to Las Vegas. Of 558 departures recorded from October 2024 to July 2026, 65.9% left on time, according to the US BTS.
- On-time departures65.9%of 558 flights
- Average delay18.6 min
- July 202612▼ 64.7%vs July 2025
- Cancelled1.3%
- Legs flown under this number25
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 | 11 | 29 | ▲ 163.6% |
| February | 17 | 35 | ▲ 105.9% |
| March | 4 | 32 | ▲ 700.0% |
| April | 26 | 27 | ▲ 3.8% |
| May | 35 | 26 | ▼ 25.7% |
| June | 37 | 14 | ▼ 62.2% |
| July | 34 | 12 | ▼ 64.7% |
| August | 32 | – | – |
| September | 30 | – | – |
| October | 30 | – | in progress |
| November | 26 | – | – |
| December | 22 | – | – |
| Year to date (Jan–Jul) | 164 | 175 | ▲ 6.7% |
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 | 75.0% | 77.8% | ▲ 3.7% |
| February | 76.5% | 77.1% | ▲ 0.9% |
| March | 100.0% | 77.4% | ▼ 22.6% |
| April | 100.0% | 74.1% | ▼ 25.9% |
| May | 91.4% | 34.6% | ▼ 62.1% |
| June | 32.4% | 28.6% | ▼ 11.9% |
| July | 20.6% | 25.0% | ▲ 21.4% |
| August | 68.8% | – | – |
| September | 80.0% | – | – |
| October | 80.0% | – | in progress |
| November | 52.0% | – | – |
| December | 27.3% | – | – |
| Year-to-date average (Jan–Jul) | 70.8% | 56.4% | ▼ 20.4% |
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 | 3 | 2 | ▼ 33.3% |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 3 | 0.0% |
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 98.7% 551
- Cancelled 1.3% 7
Share of all recorded flights in the period, all legs. · Oct 14, 2024 → Jul 29, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
8| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| MCI LAS Kansas City International Airport – Harry Reid International Airport | 1,829 | 4.5 min | 86.1% | 82 |
| DTW BNA Detroit Metropolitan Wayne County Airport – Nashville International Airport | 735 | 4.3 min | 96.5% | 57 |
| LAX DAL Los Angeles International Airport – Dallas Love Field | 2,002 | 15.4 min | 79.3% | 55 |
| PHX DEN Phoenix Sky Harbor International Airport – Denver International Airport | 968 | 7.3 min | 80.0% | 50 |
| MDW MHT Chicago Midway International Airport – Manchester-Boston Regional Airport | 1,345 | 22.0 min | 52.0% | 50 |
| PHL DAL Philadelphia International Airport – Dallas Love Field | 2,080 | 27.8 min | 37.8% | 46 |
| LAS SMF Harry Reid International Airport – Sacramento International Airport | 639 | 65.8 min | 11.1% | 36 |
| DCA LAS Ronald Reagan Washington National Airport – Harry Reid International Airport | 3,354 | 48.4 min | 30.6% | 36 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 21 | 21 | 66.7% | 0 |
| November 2024 | 27 | 27 | 92.6% | 0 |
| December 2024 | 31 | 31 | 87.1% | 0 |
| January 2025 | 11 | 8 | 75.0% | 3 |
| February 2025 | 17 | 17 | 76.5% | 0 |
| March 2025 | 4 | 4 | 100.0% | 0 |
| April 2025 | 26 | 26 | 100.0% | 0 |
| May 2025 | 35 | 35 | 91.4% | 0 |
| June 2025 | 37 | 37 | 32.4% | 0 |
| July 2025 | 34 | 34 | 20.6% | 0 |
| August 2025 | 32 | 32 | 68.8% | 0 |
| September 2025 | 30 | 30 | 80.0% | 0 |
| October 2025 | 30 | 30 | 80.0% | 0 |
| November 2025 | 26 | 25 | 52.0% | 1 |
| December 2025 | 22 | 22 | 27.3% | 0 |
| January 2026 | 29 | 27 | 77.8% | 2 |
| February 2026 | 35 | 35 | 77.1% | 0 |
| March 2026 | 32 | 31 | 77.4% | 1 |
| April 2026 | 27 | 27 | 74.1% | 0 |
| May 2026 | 26 | 26 | 34.6% | 0 |
| June 2026 | 14 | 14 | 28.6% | 0 |
| July 2026 | 12 | 12 | 25.0% | 0 |