WN3727
WN3727 (Southwest Airlines) is a multi-stop service on 26 routes, busiest Chicago to Grand Rapids. Of 501 departures recorded from October 2024 to July 2026, 69.5% left on time, according to the US BTS.
- On-time departures69.5%of 501 flights
- Average delay17.1 min
- July 202617▼ 45.2%vs July 2025
- Cancelled1.2%
- Legs flown under this number26
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 3 | 10 | ▲ 233.3% |
| February | 2 | 16 | ▲ 700.0% |
| March | 17 | 18 | ▲ 5.9% |
| April | 27 | 38 | ▲ 40.7% |
| May | 31 | 43 | ▲ 38.7% |
| June | 30 | 19 | ▼ 36.7% |
| July | 31 | 17 | ▼ 45.2% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 65 | – | in progress |
| November | 16 | – | – |
| December | 6 | – | – |
| Year to date (Jan–Jul) | 141 | 161 | ▲ 14.2% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
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 | 33.3% | 90.0% | ▲ 170.0% |
| February | 50.0% | 100.0% | ▲ 100.0% |
| March | 76.5% | 88.2% | ▲ 15.4% |
| April | 96.3% | 79.0% | ▼ 18.0% |
| May | 93.6% | 48.8% | ▼ 47.8% |
| June | 26.7% | 68.4% | ▲ 156.5% |
| July | 35.5% | 94.1% | ▲ 165.3% |
| August | 58.1% | – | – |
| September | 63.3% | – | – |
| October | 63.5% | – | in progress |
| November | 80.0% | – | – |
| December | 83.3% | – | – |
| Year-to-date average (Jan–Jul) | 58.8% | 81.2% | ▲ 38.1% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 2 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 2 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 3 |
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 98.8% 495
- Cancelled 1.2% 6
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 29, 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 |
|---|---|---|---|---|
| MDW GRR Chicago Midway International Airport – Gerald R. Ford International Airport | 220 | 52.4 min | 24.6% | 61 |
| SJC PHX Mineta San Jose International Airport – Phoenix Sky Harbor International Airport | 999 | -2.4 min | 96.6% | 58 |
| STL PHL St. Louis Lambert International Airport – Philadelphia International Airport | 1,306 | 20.6 min | 59.5% | 42 |
| MDW MSP Chicago Midway International Airport – Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field | 560 | 23.7 min | 73.8% | 42 |
| PHL MCO Philadelphia International Airport – Orlando International Airport | 1,389 | 23.5 min | 61.5% | 39 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 16 | 16 | 100.0% | 0 |
| November 2024 | 27 | 27 | 81.5% | 0 |
| December 2024 | 8 | 8 | 62.5% | 0 |
| January 2025 | 3 | 3 | 33.3% | 0 |
| February 2025 | 2 | 2 | 50.0% | 0 |
| March 2025 | 17 | 17 | 76.5% | 0 |
| April 2025 | 27 | 27 | 96.3% | 0 |
| May 2025 | 31 | 31 | 93.6% | 0 |
| June 2025 | 30 | 30 | 26.7% | 0 |
| July 2025 | 31 | 31 | 35.5% | 0 |
| August 2025 | 31 | 31 | 58.1% | 0 |
| September 2025 | 30 | 30 | 63.3% | 0 |
| October 2025 | 65 | 63 | 63.5% | 2 |
| November 2025 | 16 | 15 | 80.0% | 1 |
| December 2025 | 6 | 6 | 83.3% | 0 |
| January 2026 | 10 | 10 | 90.0% | 0 |
| February 2026 | 16 | 14 | 100.0% | 2 |
| March 2026 | 18 | 17 | 88.2% | 1 |
| April 2026 | 38 | 38 | 79.0% | 0 |
| May 2026 | 43 | 43 | 48.8% | 0 |
| June 2026 | 19 | 19 | 68.4% | 0 |
| July 2026 | 17 | 17 | 94.1% | 0 |