WN3866
WN3866 (Southwest Airlines) is a multi-stop service on 20 routes, busiest Chicago to New Orleans. Of 335 departures recorded from October 2024 to July 2026, 66.3% left on time, according to the US BTS.
- On-time departures66.3%of 335 flights
- Average delay20.4 min
- July 202617▼ 45.2%vs July 2025
- Cancelled0.9%
- Legs flown under this number20
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 | 2 | 3 | ▲ 50.0% |
| February | – | 7 | – |
| March | 38 | 5 | ▼ 86.8% |
| April | 33 | 22 | ▼ 33.3% |
| May | 31 | 26 | ▼ 16.1% |
| June | 30 | 19 | ▼ 36.7% |
| July | 31 | 17 | ▼ 45.2% |
| August | 4 | – | – |
| September | – | – | – |
| October | 17 | – | in progress |
| November | 4 | – | – |
| December | 11 | – | – |
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 | 50.0% | 100.0% | ▲ 100.0% |
| February | – | 71.4% | – |
| March | 65.8% | 40.0% | ▼ 39.2% |
| April | 60.6% | 68.2% | ▲ 12.5% |
| May | 45.2% | 42.3% | ▼ 6.3% |
| June | 60.0% | 61.1% | ▲ 1.8% |
| July | 56.7% | 81.3% | ▲ 43.4% |
| August | 75.0% | – | – |
| September | – | – | – |
| October | 88.2% | – | in progress |
| November | 100.0% | – | – |
| December | 90.9% | – | – |
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 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 1 | 1 | 0.0% |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | 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 99.1% 332
- Cancelled 0.9% 3
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
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| MDW MSY Chicago Midway International Airport – Louis Armstrong New Orleans International Airport | 1,331 | 37.2 min | 58.3% | 61 |
| PHX MSP Phoenix Sky Harbor International Airport – Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field | 2,051 | 26.0 min | 53.5% | 58 |
| DEN EUG Denver International Airport – Eugene Airport | 1,600 | 32.7 min | 52.0% | 50 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 13 | 13 | 92.3% | 0 |
| November 2024 | 16 | 16 | 93.8% | 0 |
| December 2024 | 6 | 6 | 100.0% | 0 |
| January 2025 | 2 | 2 | 50.0% | 0 |
| March 2025 | 38 | 38 | 65.8% | 0 |
| April 2025 | 33 | 33 | 60.6% | 0 |
| May 2025 | 31 | 31 | 45.2% | 0 |
| June 2025 | 30 | 30 | 60.0% | 0 |
| July 2025 | 31 | 30 | 56.7% | 1 |
| August 2025 | 4 | 4 | 75.0% | 0 |
| October 2025 | 17 | 17 | 88.2% | 0 |
| November 2025 | 4 | 4 | 100.0% | 0 |
| December 2025 | 11 | 11 | 90.9% | 0 |
| January 2026 | 3 | 3 | 100.0% | 0 |
| February 2026 | 7 | 7 | 71.4% | 0 |
| March 2026 | 5 | 5 | 40.0% | 0 |
| April 2026 | 22 | 22 | 68.2% | 0 |
| May 2026 | 26 | 26 | 42.3% | 0 |
| June 2026 | 19 | 18 | 61.1% | 1 |
| July 2026 | 17 | 16 | 81.3% | 1 |