WN3187
WN3187 (Southwest Airlines) is a multi-stop service on 23 routes, busiest Boston to Baltimore. Of 587 departures recorded from October 2024 to July 2026, 80.2% left on time, according to the US BTS.
- On-time departures80.2%of 587 flights
- Average delay10.9 min
- July 202614▼ 69.6%vs July 2025
- Cancelled1.0%
- Legs flown under this number23
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 | 11 | 32 | ▲ 190.9% |
| February | 10 | 19 | ▲ 90.0% |
| March | 26 | 30 | ▲ 15.4% |
| April | 7 | 33 | ▲ 371.4% |
| May | – | 34 | – |
| June | 44 | 15 | ▼ 65.9% |
| July | 46 | 14 | ▼ 69.6% |
| August | 43 | – | – |
| September | 39 | – | – |
| October | 23 | – | in progress |
| November | 26 | – | – |
| December | 22 | – | – |
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 | 100.0% | 79.3% | ▼ 20.7% |
| February | 90.0% | 84.2% | ▼ 6.4% |
| March | 92.3% | 96.7% | ▲ 4.7% |
| April | 100.0% | 81.8% | ▼ 18.2% |
| May | – | 67.7% | – |
| June | 70.5% | 40.0% | ▼ 43.2% |
| July | 80.4% | 15.4% | ▼ 80.9% |
| August | 74.4% | – | – |
| September | 84.6% | – | – |
| October | 91.3% | – | in progress |
| November | 52.0% | – | – |
| December | 95.5% | – | – |
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 | 1 | 3 | ▲ 200.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | – | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| 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 99.0% 581
- Cancelled 1.0% 6
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
9| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BOS BWI Boston Logan International Airport – Baltimore/Washington International Thurgood Marshall Airport | 594 | 1.7 min | 95.6% | 69 |
| BWI TPA Baltimore/Washington International Thurgood Marshall Airport – Tampa International Airport | 1,358 | 16.5 min | 74.1% | 58 |
| ELP HOU El Paso International Airport – William P. Hobby Airport | 1,087 | 10.1 min | 75.4% | 57 |
| DAL DEN Dallas Love Field – Denver International Airport | 1,048 | 6.0 min | 84.4% | 47 |
| BNA SAN Nashville International Airport – San Diego International Airport | 2,812 | 13.8 min | 71.1% | 46 |
| LAS RNO Harry Reid International Airport – Reno Tahoe International Airport | 556 | 18.9 min | 61.1% | 36 |
| ICT LAS Wichita Dwight D. Eisenhower National Airport – Harry Reid International Airport | 1,584 | 21.4 min | 82.9% | 35 |
| DEN BNA Denver International Airport – Nashville International Airport | 1,628 | -2.4 min | 97.0% | 33 |
| BZN DEN Bozeman Yellowstone International Airport – Denver International Airport | 844 | 9.0 min | 93.8% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 53 | 53 | 90.6% | 0 |
| December 2024 | 40 | 40 | 85.0% | 0 |
| January 2025 | 11 | 10 | 100.0% | 1 |
| February 2025 | 10 | 10 | 90.0% | 0 |
| March 2025 | 26 | 26 | 92.3% | 0 |
| April 2025 | 7 | 7 | 100.0% | 0 |
| June 2025 | 44 | 44 | 70.5% | 0 |
| July 2025 | 46 | 46 | 80.4% | 0 |
| August 2025 | 43 | 43 | 74.4% | 0 |
| September 2025 | 39 | 39 | 84.6% | 0 |
| October 2025 | 23 | 23 | 91.3% | 0 |
| November 2025 | 26 | 25 | 52.0% | 1 |
| December 2025 | 22 | 22 | 95.5% | 0 |
| January 2026 | 32 | 29 | 79.3% | 3 |
| February 2026 | 19 | 19 | 84.2% | 0 |
| March 2026 | 30 | 30 | 96.7% | 0 |
| April 2026 | 33 | 33 | 81.8% | 0 |
| May 2026 | 34 | 34 | 67.7% | 0 |
| June 2026 | 15 | 15 | 40.0% | 0 |
| July 2026 | 14 | 13 | 15.4% | 1 |