WN3397
WN3397 (Southwest Airlines) is a multi-stop service on 29 routes, busiest Chicago to Detroit. Of 612 departures recorded from October 2024 to July 2026, 85.0% left on time, according to the US BTS.
- On-time departures85.0%of 612 flights
- Average delay8.0 min
- July 202660▲ 46.3%vs July 2025
- Cancelled0.7%
- Legs flown under this number29
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 26 | 14 | ▼ 46.2% |
| February | 11 | 19 | ▲ 72.7% |
| March | 6 | 49 | ▲ 716.7% |
| April | 24 | 32 | ▲ 33.3% |
| May | 30 | 25 | ▼ 16.7% |
| June | 36 | 57 | ▲ 58.3% |
| July | 41 | 60 | ▲ 46.3% |
| August | 27 | – | – |
| September | 26 | – | – |
| October | 5 | – | in progress |
| November | 28 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 174 | 256 | ▲ 47.1% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 73.1% | 85.7% | ▲ 17.3% |
| February | 100.0% | 73.7% | ▼ 26.3% |
| March | 100.0% | 78.7% | ▼ 21.3% |
| April | 91.7% | 93.8% | ▲ 2.3% |
| May | 89.7% | 96.0% | ▲ 7.1% |
| June | 94.4% | 86.0% | ▼ 9.0% |
| July | 80.5% | 95.0% | ▲ 18.0% |
| August | 88.9% | – | – |
| September | 88.5% | – | – |
| October | 100.0% | – | in progress |
| November | 74.1% | – | – |
| December | 51.6% | – | – |
| Year-to-date average (Jan–Jul) | 89.9% | 87.0% | ▼ 3.3% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 2 | – |
| 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 | 2 | ▲ 100.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.3% 608
- Cancelled 0.7% 4
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
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| MDW DTW Chicago Midway International Airport – Detroit Metropolitan Wayne County Airport | 367 | 3.8 min | 86.6% | 67 |
| BNA LAS Nashville International Airport – Harry Reid International Airport | 2,549 | 12.3 min | 88.3% | 60 |
| MCO BNA Orlando International Airport – Nashville International Airport | 993 | 2.1 min | 91.1% | 57 |
| OAK SEA Oakland San Francisco Bay Airport – Seattle–Tacoma International Airport | 1,082 | -0.6 min | 98.0% | 50 |
| MDW TPA Chicago Midway International Airport – Tampa International Airport | 1,607 | -3.1 min | 98.0% | 49 |
| LAX MSY Los Angeles International Airport – Louis Armstrong New Orleans International Airport | 2,682 | 5.0 min | 89.8% | 49 |
| DAL CHS Dallas Love Field – Charleston International Airport | 1,568 | 17.8 min | 72.7% | 45 |
| SEA DEN Seattle–Tacoma International Airport – Denver International Airport | 1,645 | 3.8 min | 92.7% | 41 |
| SJC SAN Mineta San Jose International Airport – San Diego International Airport | 671 | 6.7 min | 83.3% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 16 | 16 | 75.0% | 0 |
| November 2024 | 21 | 21 | 90.5% | 0 |
| December 2024 | 28 | 28 | 85.7% | 0 |
| January 2025 | 26 | 26 | 73.1% | 0 |
| February 2025 | 11 | 11 | 100.0% | 0 |
| March 2025 | 6 | 6 | 100.0% | 0 |
| April 2025 | 24 | 24 | 91.7% | 0 |
| May 2025 | 30 | 29 | 89.7% | 1 |
| June 2025 | 36 | 36 | 94.4% | 0 |
| July 2025 | 41 | 41 | 80.5% | 0 |
| August 2025 | 27 | 27 | 88.9% | 0 |
| September 2025 | 26 | 26 | 88.5% | 0 |
| October 2025 | 5 | 5 | 100.0% | 0 |
| November 2025 | 28 | 27 | 74.1% | 1 |
| December 2025 | 31 | 31 | 51.6% | 0 |
| January 2026 | 14 | 14 | 85.7% | 0 |
| February 2026 | 19 | 19 | 73.7% | 0 |
| March 2026 | 49 | 47 | 78.7% | 2 |
| April 2026 | 32 | 32 | 93.8% | 0 |
| May 2026 | 25 | 25 | 96.0% | 0 |
| June 2026 | 57 | 57 | 86.0% | 0 |
| July 2026 | 60 | 60 | 95.0% | 0 |