WN3773
WN3773 (Southwest Airlines) is a multi-stop service on 25 routes, busiest Baltimore to Boston. Of 558 departures recorded from October 2024 to July 2026, 77.4% left on time, according to the US BTS.
- On-time departures77.4%of 558 flights
- Average delay13.0 min
- July 202627▼ 10.0%vs July 2025
- Cancelled0.7%
- Legs flown under this number25
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 | 3 | ▼ 90.3% |
| February | 26 | – | – |
| March | 31 | 27 | ▼ 12.9% |
| April | 13 | 41 | ▲ 215.4% |
| May | 9 | 43 | ▲ 377.8% |
| June | 27 | 28 | ▲ 3.7% |
| July | 30 | 27 | ▼ 10.0% |
| August | 19 | – | – |
| September | 17 | – | – |
| October | 53 | – | in progress |
| November | 5 | – | – |
| 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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 74.2% | 66.7% | ▼ 10.1% |
| February | 76.9% | – | – |
| March | 61.3% | 100.0% | ▲ 63.2% |
| April | 92.3% | 95.1% | ▲ 3.0% |
| May | 100.0% | 81.4% | ▼ 18.6% |
| June | 53.9% | 92.9% | ▲ 72.4% |
| July | 60.0% | 96.3% | ▲ 60.5% |
| August | 50.0% | – | – |
| September | 64.7% | – | – |
| October | 88.7% | – | in progress |
| November | 100.0% | – | – |
| December | 72.7% | – | – |
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 | – | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 0 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| 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 99.3% 554
- 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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BWI BOS Baltimore/Washington International Thurgood Marshall Airport – Boston Logan International Airport | 594 | 17.8 min | 71.2% | 112 |
| STL LAS St. Louis Lambert International Airport – Harry Reid International Airport | 2,202 | 26.1 min | 55.9% | 60 |
| STL PIT St. Louis Lambert International Airport – Pittsburgh International Airport | 889 | 7.1 min | 88.0% | 50 |
| SMF DEN Sacramento International Airport – Denver International Airport | 1,460 | 3.9 min | 94.0% | 50 |
| LGB SMF Long Beach International Airport – Sacramento International Airport | 624 | -6.3 min | 100.0% | 33 |
| STL LGA St. Louis Lambert International Airport – LaGuardia Airport | 1,426 | 17.4 min | 58.1% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 48 | 47 | 68.1% | 1 |
| December 2024 | 49 | 48 | 56.3% | 1 |
| January 2025 | 31 | 31 | 74.2% | 0 |
| February 2025 | 26 | 26 | 76.9% | 0 |
| March 2025 | 31 | 31 | 61.3% | 0 |
| April 2025 | 13 | 13 | 92.3% | 0 |
| May 2025 | 9 | 9 | 100.0% | 0 |
| June 2025 | 27 | 26 | 53.9% | 1 |
| July 2025 | 30 | 30 | 60.0% | 0 |
| August 2025 | 19 | 18 | 50.0% | 1 |
| September 2025 | 17 | 17 | 64.7% | 0 |
| October 2025 | 53 | 53 | 88.7% | 0 |
| November 2025 | 5 | 5 | 100.0% | 0 |
| December 2025 | 11 | 11 | 72.7% | 0 |
| January 2026 | 3 | 3 | 66.7% | 0 |
| March 2026 | 27 | 27 | 100.0% | 0 |
| April 2026 | 41 | 41 | 95.1% | 0 |
| May 2026 | 43 | 43 | 81.4% | 0 |
| June 2026 | 28 | 28 | 92.9% | 0 |
| July 2026 | 27 | 27 | 96.3% | 0 |