WN3964
WN3964 (Southwest Airlines) is a multi-stop service on 19 routes, busiest Colorado Springs to Denver. Of 472 departures recorded from October 2024 to July 2026, 75.6% left on time, according to the US BTS.
- On-time departures75.6%of 472 flights
- Average delay12.4 min
- July 202627▼ 40.0%vs July 2025
- Cancelled1.1%
- Legs flown under this number19
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods16 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 31 | – | – |
| February | 28 | 3 | ▼ 89.3% |
| March | 31 | 31 | 0.0% |
| April | 13 | 39 | ▲ 200.0% |
| May | 8 | 39 | ▲ 387.5% |
| June | 37 | 28 | ▼ 24.3% |
| July | 45 | 27 | ▼ 40.0% |
| August | 16 | – | – |
| September | 13 | – | – |
| October | 3 | – | in progress |
| November | – | – | – |
| December | – | – | – |
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 periods16 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 87.1% | – | – |
| February | 78.6% | 100.0% | ▲ 27.3% |
| March | 96.7% | 72.4% | ▼ 25.1% |
| April | 84.6% | 89.7% | ▲ 6.1% |
| May | 100.0% | 74.4% | ▼ 25.6% |
| June | 62.2% | 46.4% | ▼ 25.3% |
| July | 51.1% | 48.2% | ▼ 5.8% |
| August | 73.3% | – | – |
| September | 100.0% | – | – |
| October | 100.0% | – | in progress |
| November | – | – | – |
| December | – | – | – |
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 periods16 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | – | – |
| February | 0 | 0 | – |
| March | 1 | 2 | ▲ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | – | – | – |
| December | – | – | – |
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% 467
- Cancelled 1.1% 5
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 |
|---|---|---|---|---|
| COS DEN City of Colorado Springs Municipal Airport – Denver International Airport | 117 | 2.0 min | 85.1% | 122 |
| MDW HOU Chicago Midway International Airport – William P. Hobby Airport | 1,510 | 9.4 min | 79.3% | 58 |
| LAS DAL Harry Reid International Airport – Dallas Love Field | 1,714 | 30.7 min | 49.0% | 52 |
| STL MSY St. Louis Lambert International Airport – Louis Armstrong New Orleans International Airport | 974 | 36.6 min | 44.0% | 50 |
| CHS BWI Charleston International Airport – Baltimore/Washington International Thurgood Marshall Airport | 761 | -1.4 min | 90.6% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 89.5% | 0 |
| November 2024 | 29 | 28 | 96.4% | 1 |
| December 2024 | 32 | 32 | 78.1% | 0 |
| January 2025 | 31 | 31 | 87.1% | 0 |
| February 2025 | 28 | 28 | 78.6% | 0 |
| March 2025 | 31 | 30 | 96.7% | 1 |
| April 2025 | 13 | 13 | 84.6% | 0 |
| May 2025 | 8 | 8 | 100.0% | 0 |
| June 2025 | 37 | 37 | 62.2% | 0 |
| July 2025 | 45 | 45 | 51.1% | 0 |
| August 2025 | 16 | 15 | 73.3% | 1 |
| September 2025 | 13 | 13 | 100.0% | 0 |
| October 2025 | 3 | 3 | 100.0% | 0 |
| February 2026 | 3 | 3 | 100.0% | 0 |
| March 2026 | 31 | 29 | 72.4% | 2 |
| April 2026 | 39 | 39 | 89.7% | 0 |
| May 2026 | 39 | 39 | 74.4% | 0 |
| June 2026 | 28 | 28 | 46.4% | 0 |
| July 2026 | 27 | 27 | 48.2% | 0 |