WN4090
WN4090 (Southwest Airlines) is a multi-stop service on 22 routes, busiest Denver to Kansas City. Of 434 departures recorded from October 2024 to July 2026, 85.9% left on time, according to the US BTS.
- On-time departures85.9%of 434 flights
- Average delay7.1 min
- July 202631▲ 0.0%vs July 2025
- Cancelled0.2%
- 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 periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 35 | 2 | ▼ 94.3% |
| February | 56 | 1 | ▼ 98.2% |
| March | 9 | – | – |
| April | 29 | 24 | ▼ 17.2% |
| May | 28 | 31 | ▲ 10.7% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 19 | – | – |
| September | 17 | – | – |
| October | – | – | in progress |
| November | 5 | – | – |
| December | 5 | – | – |
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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 77.1% | 100.0% | ▲ 29.6% |
| February | 67.9% | 100.0% | ▲ 47.4% |
| March | 55.6% | – | – |
| April | 86.2% | 95.8% | ▲ 11.2% |
| May | 67.9% | 96.7% | ▲ 42.5% |
| June | 93.3% | 90.0% | ▼ 3.6% |
| July | 96.8% | 100.0% | ▲ 3.3% |
| August | 89.5% | – | – |
| September | 100.0% | – | – |
| October | – | – | in progress |
| November | 80.0% | – | – |
| December | 100.0% | – | – |
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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | – | – |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | – | – | in progress |
| November | 0 | – | – |
| 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 99.8% 433
- Cancelled 0.2% 1
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 |
|---|---|---|---|---|
| DEN MCI Denver International Airport – Kansas City International Airport | 855 | 15.8 min | 70.7% | 75 |
| OGG HNL Kahului International Airport – Daniel K. Inouye International Airport | 162 | 0.1 min | 95.1% | 61 |
| SFO SAN San Francisco International Airport – San Diego International Airport | 719 | -3.0 min | 96.5% | 58 |
| ICT DEN Wichita Dwight D. Eisenhower National Airport – Denver International Airport | 674 | 3.9 min | 94.8% | 58 |
| BUR PHX Hollywood Burbank/Bob Hope Airport – Phoenix Sky Harbor International Airport | 593 | 15.5 min | 78.0% | 50 |
| SNA PHX John Wayne Orange County International Airport – Phoenix Sky Harbor International Airport | 544 | 1.7 min | 93.8% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 100.0% | 0 |
| November 2024 | 13 | 13 | 76.9% | 0 |
| December 2024 | 19 | 19 | 79.0% | 0 |
| January 2025 | 35 | 35 | 77.1% | 0 |
| February 2025 | 56 | 56 | 67.9% | 0 |
| March 2025 | 9 | 9 | 55.6% | 0 |
| April 2025 | 29 | 29 | 86.2% | 0 |
| May 2025 | 28 | 28 | 67.9% | 0 |
| June 2025 | 30 | 30 | 93.3% | 0 |
| July 2025 | 31 | 31 | 96.8% | 0 |
| August 2025 | 19 | 19 | 89.5% | 0 |
| September 2025 | 17 | 17 | 100.0% | 0 |
| November 2025 | 5 | 5 | 80.0% | 0 |
| December 2025 | 5 | 5 | 100.0% | 0 |
| January 2026 | 2 | 2 | 100.0% | 0 |
| February 2026 | 1 | 1 | 100.0% | 0 |
| April 2026 | 24 | 24 | 95.8% | 0 |
| May 2026 | 31 | 30 | 96.7% | 1 |
| June 2026 | 30 | 30 | 90.0% | 0 |
| July 2026 | 31 | 31 | 100.0% | 0 |