WN3976
WN3976 (Southwest Airlines) is a multi-stop service on 22 routes, busiest Portland to Baltimore. Of 423 departures recorded from October 2024 to July 2026, 75.5% left on time, according to the US BTS.
- On-time departures75.5%of 423 flights
- Average delay13.2 min
- July 202620▼ 4.8%vs July 2025
- Cancelled0.7%
- Legs flown under this number22
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods15 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 13 | – | – |
| February | 22 | – | – |
| March | 29 | 26 | ▼ 10.3% |
| April | 35 | 30 | ▼ 14.3% |
| May | 34 | 31 | ▼ 8.8% |
| June | 26 | 22 | ▼ 15.4% |
| July | 21 | 20 | ▼ 4.8% |
| August | 26 | – | – |
| September | 26 | – | – |
| October | – | – | in progress |
| November | 2 | – | – |
| December | – | – | – |
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 periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 76.9% | – | – |
| February | 77.3% | – | – |
| March | 85.7% | 44.0% | ▼ 48.7% |
| April | 77.1% | 83.3% | ▲ 8.0% |
| May | 76.5% | 96.8% | ▲ 26.5% |
| June | 80.8% | 77.3% | ▼ 4.3% |
| July | 90.5% | 68.4% | ▼ 24.4% |
| August | 50.0% | – | – |
| September | 73.1% | – | – |
| October | – | – | in progress |
| November | 50.0% | – | – |
| December | – | – | – |
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 periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | – | – |
| February | 0 | – | – |
| March | 1 | 1 | 0.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | – | – | in progress |
| November | 0 | – | – |
| December | – | – | – |
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% 420
- Cancelled 0.7% 3
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 29, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PWM BWI Portland International Jetport – Baltimore/Washington International Thurgood Marshall Airport | 727 | -0.2 min | 94.8% | 58 |
| DJT ISP President Donald J. Trump International Airport – Long Island MacArthur Airport | 1,696 | 18.1 min | 64.6% | 48 |
| BWI BOS Baltimore/Washington International Thurgood Marshall Airport – Boston Logan International Airport | 594 | 7.6 min | 77.8% | 36 |
| SBA LAS Santa Barbara Municipal Airport – Harry Reid International Airport | 464 | 6.6 min | 82.4% | 34 |
| OAK SBA Oakland San Francisco Bay Airport – Santa Barbara Municipal Airport | 424 | 4.9 min | 82.4% | 34 |
| STL RDU St. Louis Lambert International Airport – Raleigh-Durham International Airport | 1,072 | 12.2 min | 72.7% | 33 |
| MDW PDX Chicago Midway International Airport – Portland International Airport | 2,811 | 41.1 min | 45.2% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 32 | 32 | 84.4% | 0 |
| November 2024 | 12 | 12 | 66.7% | 0 |
| December 2024 | 16 | 16 | 56.3% | 0 |
| January 2025 | 13 | 13 | 76.9% | 0 |
| February 2025 | 22 | 22 | 77.3% | 0 |
| March 2025 | 29 | 28 | 85.7% | 1 |
| April 2025 | 35 | 35 | 77.1% | 0 |
| May 2025 | 34 | 34 | 76.5% | 0 |
| June 2025 | 26 | 26 | 80.8% | 0 |
| July 2025 | 21 | 21 | 90.5% | 0 |
| August 2025 | 26 | 26 | 50.0% | 0 |
| September 2025 | 26 | 26 | 73.1% | 0 |
| November 2025 | 2 | 2 | 50.0% | 0 |
| March 2026 | 26 | 25 | 44.0% | 1 |
| April 2026 | 30 | 30 | 83.3% | 0 |
| May 2026 | 31 | 31 | 96.8% | 0 |
| June 2026 | 22 | 22 | 77.3% | 0 |
| July 2026 | 20 | 19 | 68.4% | 1 |