WN428
WN428 (Southwest Airlines) is a multi-stop service on 37 routes, busiest Hartford to Chicago. Of 853 departures recorded from October 2024 to July 2026, 72.5% left on time, according to the US BTS.
- On-time departures72.5%of 853 flights
- Average delay15.8 min
- July 202662▲ 129.6%vs July 2025
- Cancelled1.4%
- Legs flown under this number37
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 | 30 | 28 | ▼ 6.7% |
| February | 28 | 27 | ▼ 3.6% |
| March | 31 | 39 | ▲ 25.8% |
| April | 30 | 72 | ▲ 140.0% |
| May | 31 | 81 | ▲ 161.3% |
| June | 26 | 61 | ▲ 134.6% |
| July | 27 | 62 | ▲ 129.6% |
| August | 34 | – | – |
| September | 34 | – | – |
| October | 31 | – | in progress |
| November | 44 | – | – |
| December | 49 | – | – |
| Year to date (Jan–Jul) | 203 | 370 | ▲ 82.3% |
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 | 96.7% | 85.2% | ▼ 11.9% |
| February | 85.7% | 96.0% | ▲ 12.0% |
| March | 90.3% | 76.9% | ▼ 14.8% |
| April | 93.3% | 65.3% | ▼ 30.1% |
| May | 93.3% | 54.3% | ▼ 41.8% |
| June | 69.2% | 50.8% | ▼ 26.6% |
| July | 48.2% | 48.2% | ▲ 0.1% |
| August | 91.2% | – | – |
| September | 88.2% | – | – |
| October | 90.3% | – | in progress |
| November | 61.9% | – | – |
| December | 57.1% | – | – |
| Year-to-date average (Jan–Jul) | 82.4% | 68.1% | ▼ 17.3% |
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 | 1 | – |
| February | 0 | 2 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 0 | 6 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 9 | ▲ 800.0% |
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 98.6% 841
- Cancelled 1.4% 12
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
9Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 60.0% | 0 |
| November 2024 | 34 | 34 | 88.2% | 0 |
| December 2024 | 34 | 34 | 91.2% | 0 |
| January 2025 | 30 | 30 | 96.7% | 0 |
| February 2025 | 28 | 28 | 85.7% | 0 |
| March 2025 | 31 | 31 | 90.3% | 0 |
| April 2025 | 30 | 30 | 93.3% | 0 |
| May 2025 | 31 | 30 | 93.3% | 1 |
| June 2025 | 26 | 26 | 69.2% | 0 |
| July 2025 | 27 | 27 | 48.2% | 0 |
| August 2025 | 34 | 34 | 91.2% | 0 |
| September 2025 | 34 | 34 | 88.2% | 0 |
| October 2025 | 31 | 31 | 90.3% | 0 |
| November 2025 | 44 | 42 | 61.9% | 2 |
| December 2025 | 49 | 49 | 57.1% | 0 |
| January 2026 | 28 | 27 | 85.2% | 1 |
| February 2026 | 27 | 25 | 96.0% | 2 |
| March 2026 | 39 | 39 | 76.9% | 0 |
| April 2026 | 72 | 72 | 65.3% | 0 |
| May 2026 | 81 | 81 | 54.3% | 0 |
| June 2026 | 61 | 61 | 50.8% | 0 |
| July 2026 | 62 | 56 | 48.2% | 6 |