WN1933
WN1933 (Southwest Airlines) is a multi-stop service on 29 routes, busiest Chicago to Boston. Of 595 departures recorded from October 2024 to July 2026, 73.8% left on time, according to the US BTS.
- On-time departures73.8%of 595 flights
- Average delay16.4 min
- July 202632▲ 88.2%vs July 2025
- Cancelled1.2%
- Legs flown under this number29
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 31 | 31 | 0.0% |
| February | 20 | 25 | ▲ 25.0% |
| March | 44 | 56 | ▲ 27.3% |
| April | 11 | 45 | ▲ 309.1% |
| May | – | 43 | – |
| June | 16 | 32 | ▲ 100.0% |
| July | 17 | 32 | ▲ 88.2% |
| August | 18 | – | – |
| September | 17 | – | – |
| October | 30 | – | in progress |
| November | 40 | – | – |
| December | 33 | – | – |
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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 83.9% | 64.5% | ▼ 23.1% |
| February | 85.0% | 80.0% | ▼ 5.9% |
| March | 84.1% | 96.4% | ▲ 14.7% |
| April | 90.9% | 45.2% | ▼ 50.2% |
| May | – | 16.3% | – |
| June | 87.5% | 81.3% | ▼ 7.1% |
| July | 94.1% | 96.9% | ▲ 2.9% |
| August | 52.9% | – | – |
| September | 41.2% | – | – |
| October | 93.3% | – | in progress |
| November | 79.0% | – | – |
| December | 78.1% | – | – |
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 periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 3 | – |
| May | – | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 1 | – | – |
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% 588
- Cancelled 1.2% 7
Share of all recorded flights in the period, all legs. · Oct 23, 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 | 1 | 1 | 100.0% | 0 |
| November 2024 | 16 | 16 | 81.3% | 0 |
| December 2024 | 37 | 37 | 64.9% | 0 |
| January 2025 | 31 | 31 | 83.9% | 0 |
| February 2025 | 20 | 20 | 85.0% | 0 |
| March 2025 | 44 | 44 | 84.1% | 0 |
| April 2025 | 11 | 11 | 90.9% | 0 |
| June 2025 | 16 | 16 | 87.5% | 0 |
| July 2025 | 17 | 17 | 94.1% | 0 |
| August 2025 | 18 | 17 | 52.9% | 1 |
| September 2025 | 17 | 17 | 41.2% | 0 |
| October 2025 | 30 | 30 | 93.3% | 0 |
| November 2025 | 40 | 38 | 79.0% | 2 |
| December 2025 | 33 | 32 | 78.1% | 1 |
| January 2026 | 31 | 31 | 64.5% | 0 |
| February 2026 | 25 | 25 | 80.0% | 0 |
| March 2026 | 56 | 56 | 96.4% | 0 |
| April 2026 | 45 | 42 | 45.2% | 3 |
| May 2026 | 43 | 43 | 16.3% | 0 |
| June 2026 | 32 | 32 | 81.3% | 0 |
| July 2026 | 32 | 32 | 96.9% | 0 |