WN3511
WN3511 (Southwest Airlines) is a multi-stop service on 21 routes, busiest Kansas City to Denver. Of 402 departures recorded from October 2024 to July 2026, 75.2% left on time, according to the US BTS.
- On-time departures75.2%of 402 flights
- Average delay14.1 min
- July 202617▼ 19.0%vs July 2025
- Cancelled0.8%
- Legs flown under this number21
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 10 | 10 | 0.0% |
| February | 8 | 15 | ▲ 87.5% |
| March | 15 | 43 | ▲ 186.7% |
| April | 7 | 11 | ▲ 57.1% |
| May | 3 | 13 | ▲ 333.3% |
| June | 21 | 18 | ▼ 14.3% |
| July | 21 | 17 | ▼ 19.0% |
| August | 4 | – | – |
| September | – | – | – |
| October | 22 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 85 | 127 | ▲ 49.4% |
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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 80.0% | 100.0% | ▲ 25.0% |
| February | 42.9% | 66.7% | ▲ 55.6% |
| March | 100.0% | 61.9% | ▼ 38.1% |
| April | 100.0% | 81.8% | ▼ 18.2% |
| May | 33.3% | 38.5% | ▲ 15.4% |
| June | 90.5% | 16.7% | ▼ 81.6% |
| July | 85.7% | 41.2% | ▼ 52.0% |
| August | 100.0% | – | – |
| September | – | – | – |
| October | 77.3% | – | in progress |
| November | 93.1% | – | – |
| December | 93.6% | – | – |
| Year-to-date average (Jan–Jul) | 76.1% | 58.1% | ▼ 23.6% |
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 periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 2 | ▲ 100.0% |
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 99.3% 399
- Cancelled 0.7% 3
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 |
|---|---|---|---|---|
| MCI DEN Kansas City International Airport – Denver International Airport | 855 | 1.4 min | 93.8% | 64 |
| LAS BUF Harry Reid International Airport – Buffalo Niagara International Airport | 3,189 | 12.8 min | 77.8% | 55 |
| PNS BNA Pensacola International Airport – Nashville International Airport | 630 | 2.6 min | 91.1% | 45 |
| BUF MCO Buffalo Niagara International Airport – Orlando International Airport | 1,630 | 5.3 min | 85.7% | 42 |
| LAX SAT Los Angeles International Airport – San Antonio International Airport | 1,945 | 49.5 min | 24.2% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 4 | 4 | 75.0% | 0 |
| November 2024 | 50 | 50 | 68.0% | 0 |
| December 2024 | 50 | 50 | 92.0% | 0 |
| January 2025 | 10 | 10 | 80.0% | 0 |
| February 2025 | 8 | 7 | 42.9% | 1 |
| March 2025 | 15 | 15 | 100.0% | 0 |
| April 2025 | 7 | 7 | 100.0% | 0 |
| May 2025 | 3 | 3 | 33.3% | 0 |
| June 2025 | 21 | 21 | 90.5% | 0 |
| July 2025 | 21 | 21 | 85.7% | 0 |
| August 2025 | 4 | 4 | 100.0% | 0 |
| October 2025 | 22 | 22 | 77.3% | 0 |
| November 2025 | 29 | 29 | 93.1% | 0 |
| December 2025 | 31 | 31 | 93.6% | 0 |
| January 2026 | 10 | 9 | 100.0% | 1 |
| February 2026 | 15 | 15 | 66.7% | 0 |
| March 2026 | 43 | 42 | 61.9% | 1 |
| April 2026 | 11 | 11 | 81.8% | 0 |
| May 2026 | 13 | 13 | 38.5% | 0 |
| June 2026 | 18 | 18 | 16.7% | 0 |
| July 2026 | 17 | 17 | 41.2% | 0 |