WN3686
WN3686 (Southwest Airlines) is a multi-stop service on 22 routes, busiest Chicago to Denver. Of 327 departures recorded from October 2024 to July 2026, 75.4% left on time, according to the US BTS.
- On-time departures75.4%of 327 flights
- Average delay12.2 min
- July 202620▲ 300.0%vs July 2025
- Cancelled0.6%
- 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 periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 25 | 7 | ▼ 72.0% |
| February | 18 | 15 | ▼ 16.7% |
| March | 29 | 29 | 0.0% |
| April | 27 | 9 | ▼ 66.7% |
| May | 27 | 6 | ▼ 77.8% |
| June | 8 | 24 | ▲ 200.0% |
| July | 5 | 20 | ▲ 300.0% |
| August | 27 | – | – |
| September | 30 | – | – |
| October | 2 | – | in progress |
| November | 4 | – | – |
| December | 11 | – | – |
| Year to date (Jan–Jul) | 139 | 110 | ▼ 20.9% |
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 periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 84.0% | 57.1% | ▼ 32.0% |
| February | 88.9% | 80.0% | ▼ 10.0% |
| March | 86.2% | 44.8% | ▼ 48.0% |
| April | 88.9% | 77.8% | ▼ 12.5% |
| May | 80.8% | 100.0% | ▲ 23.8% |
| June | 62.5% | 66.7% | ▲ 6.7% |
| July | 40.0% | 70.0% | ▲ 75.0% |
| August | 77.8% | – | – |
| September | 93.3% | – | – |
| October | 100.0% | – | in progress |
| November | 66.7% | – | – |
| December | 18.2% | – | – |
| Year-to-date average (Jan–Jul) | 75.9% | 70.9% | ▼ 6.6% |
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 periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 0 | ▼ 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 99.4% 325
- Cancelled 0.6% 2
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 29, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD DEN Chicago O'Hare International Airport – Denver International Airport | 1,426 | 6.5 min | 87.7% | 57 |
| DEN MCI Denver International Airport – Kansas City International Airport | 855 | 4.7 min | 87.8% | 50 |
| STL PHL St. Louis Lambert International Airport – Philadelphia International Airport | 1,306 | 32.1 min | 51.5% | 33 |
| SJC ONT Mineta San Jose International Airport – Ontario International Airport | 536 | 1.8 min | 87.9% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 3 | 3 | 100.0% | 0 |
| November 2024 | 1 | 1 | 100.0% | 0 |
| January 2025 | 25 | 25 | 84.0% | 0 |
| February 2025 | 18 | 18 | 88.9% | 0 |
| March 2025 | 29 | 29 | 86.2% | 0 |
| April 2025 | 27 | 27 | 88.9% | 0 |
| May 2025 | 27 | 26 | 80.8% | 1 |
| June 2025 | 8 | 8 | 62.5% | 0 |
| July 2025 | 5 | 5 | 40.0% | 0 |
| August 2025 | 27 | 27 | 77.8% | 0 |
| September 2025 | 30 | 30 | 93.3% | 0 |
| October 2025 | 2 | 2 | 100.0% | 0 |
| November 2025 | 4 | 3 | 66.7% | 1 |
| December 2025 | 11 | 11 | 18.2% | 0 |
| January 2026 | 7 | 7 | 57.1% | 0 |
| February 2026 | 15 | 15 | 80.0% | 0 |
| March 2026 | 29 | 29 | 44.8% | 0 |
| April 2026 | 9 | 9 | 77.8% | 0 |
| May 2026 | 6 | 6 | 100.0% | 0 |
| June 2026 | 24 | 24 | 66.7% | 0 |
| July 2026 | 20 | 20 | 70.0% | 0 |