WN4514
WN4514 (Southwest Airlines) is a multi-stop service on 23 routes, busiest Denver to Chicago. Of 452 departures recorded from October 2024 to July 2026, 62.1% left on time, according to the US BTS.
- On-time departures62.1%of 452 flights
- Average delay19.7 min
- July 202640▲ 29.0%vs July 2025
- Cancelled1.3%
- Legs flown under this number23
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 | 29 | 2 | ▼ 93.1% |
| February | 44 | 1 | ▼ 97.7% |
| March | 19 | 10 | ▼ 47.4% |
| April | 29 | 27 | ▼ 6.9% |
| May | 35 | 31 | ▼ 11.4% |
| June | 31 | 37 | ▲ 19.4% |
| July | 31 | 40 | ▲ 29.0% |
| August | 8 | – | – |
| September | 4 | – | – |
| October | – | – | in progress |
| November | 6 | – | – |
| December | 4 | – | – |
| Year to date (Jan–Jul) | 218 | 148 | ▼ 32.1% |
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 | 75.9% | 0.0% | ▼ 100.0% |
| February | 60.5% | 100.0% | ▲ 65.4% |
| March | 83.3% | 66.7% | ▼ 20.0% |
| April | 69.0% | 77.8% | ▲ 12.8% |
| May | 48.5% | 51.6% | ▲ 6.5% |
| June | 51.6% | 29.7% | ▼ 42.4% |
| July | 71.0% | 55.0% | ▼ 22.5% |
| August | 37.5% | – | – |
| September | 100.0% | – | – |
| October | – | – | in progress |
| November | 66.7% | – | – |
| December | 100.0% | – | – |
| Year-to-date average (Jan–Jul) | 65.7% | 54.4% | ▼ 17.2% |
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 periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 1 | 0 | ▼ 100.0% |
| March | 1 | 1 | 0.0% |
| April | 0 | 0 | – |
| May | 2 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | – | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 1 | ▼ 75.0% |
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% 446
- Cancelled 1.3% 6
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN MDW Denver International Airport – Chicago Midway International Airport | 1,438 | 15.5 min | 71.9% | 98 |
| SJC PHX Mineta San Jose International Airport – Phoenix Sky Harbor International Airport | 999 | 16.4 min | 57.4% | 61 |
| STL RSW St. Louis Lambert International Airport – Southwest Florida International Airport | 1,578 | 21.4 min | 63.8% | 58 |
| DAL LIT Dallas Love Field – Bill & Hillary Clinton National Airport/Adams Field | 476 | 25.3 min | 54.6% | 57 |
| SNA PHX John Wayne Orange County International Airport – Phoenix Sky Harbor International Airport | 544 | 28.5 min | 46.0% | 50 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 25 | 25 | 84.0% | 0 |
| November 2024 | 23 | 22 | 86.4% | 1 |
| December 2024 | 16 | 16 | 50.0% | 0 |
| January 2025 | 29 | 29 | 75.9% | 0 |
| February 2025 | 44 | 43 | 60.5% | 1 |
| March 2025 | 19 | 18 | 83.3% | 1 |
| April 2025 | 29 | 29 | 69.0% | 0 |
| May 2025 | 35 | 33 | 48.5% | 2 |
| June 2025 | 31 | 31 | 51.6% | 0 |
| July 2025 | 31 | 31 | 71.0% | 0 |
| August 2025 | 8 | 8 | 37.5% | 0 |
| September 2025 | 4 | 4 | 100.0% | 0 |
| November 2025 | 6 | 6 | 66.7% | 0 |
| December 2025 | 4 | 4 | 100.0% | 0 |
| January 2026 | 2 | 2 | 0.0% | 0 |
| February 2026 | 1 | 1 | 100.0% | 0 |
| March 2026 | 10 | 9 | 66.7% | 1 |
| April 2026 | 27 | 27 | 77.8% | 0 |
| May 2026 | 31 | 31 | 51.6% | 0 |
| June 2026 | 37 | 37 | 29.7% | 0 |
| July 2026 | 40 | 40 | 55.0% | 0 |