WN4004
WN4004 (Southwest Airlines) is a multi-stop service on 16 routes, busiest Richmond to Baltimore. Of 312 departures recorded from October 2024 to July 2026, 81.2% left on time, according to the US BTS.
- On-time departures81.2%of 312 flights
- Average delay9.5 min
- July 202630
- Cancelled1.0%
- Legs flown under this number16
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 | 8 | 8 | 0.0% |
| February | 12 | 8 | ▼ 33.3% |
| March | 22 | 14 | ▼ 36.4% |
| April | 5 | 28 | ▲ 460.0% |
| May | 1 | 31 | ▲ 3,000.0% |
| June | – | 26 | – |
| July | – | 30 | – |
| August | – | – | – |
| September | – | – | – |
| October | 34 | – | in progress |
| November | 6 | – | – |
| 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 periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 62.5% | 87.5% | ▲ 40.0% |
| February | 83.3% | 100.0% | ▲ 20.0% |
| March | 71.4% | 92.3% | ▲ 29.2% |
| April | 60.0% | 92.9% | ▲ 54.8% |
| May | 100.0% | 90.3% | ▼ 9.7% |
| June | – | 84.6% | – |
| July | – | 75.9% | – |
| August | – | – | – |
| September | – | – | – |
| October | 73.5% | – | in progress |
| November | 100.0% | – | – |
| December | 27.3% | – | – |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 1 | 1 | 0.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | – | 0 | – |
| July | – | 1 | – |
| August | – | – | – |
| September | – | – | – |
| 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 99.0% 309
- Cancelled 1.0% 3
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| RIC BWI Richmond International Airport – Baltimore/Washington International Thurgood Marshall Airport | 194 | -1.8 min | 94.8% | 58 |
| TPA BNA Tampa International Airport – Nashville International Airport | 987 | 15.6 min | 79.6% | 50 |
| OAK GEG Oakland San Francisco Bay Airport – Spokane International Airport | 1,165 | 6.8 min | 86.7% | 45 |
| BZN LAS Bozeman Yellowstone International Airport – Harry Reid International Airport | 1,129 | 13.7 min | 77.4% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 13 | 13 | 84.6% | 0 |
| November 2024 | 26 | 26 | 84.6% | 0 |
| December 2024 | 29 | 29 | 86.2% | 0 |
| January 2025 | 8 | 8 | 62.5% | 0 |
| February 2025 | 12 | 12 | 83.3% | 0 |
| March 2025 | 22 | 21 | 71.4% | 1 |
| April 2025 | 5 | 5 | 60.0% | 0 |
| May 2025 | 1 | 1 | 100.0% | 0 |
| October 2025 | 34 | 34 | 73.5% | 0 |
| November 2025 | 6 | 6 | 100.0% | 0 |
| December 2025 | 11 | 11 | 27.3% | 0 |
| January 2026 | 8 | 8 | 87.5% | 0 |
| February 2026 | 8 | 8 | 100.0% | 0 |
| March 2026 | 14 | 13 | 92.3% | 1 |
| April 2026 | 28 | 28 | 92.9% | 0 |
| May 2026 | 31 | 31 | 90.3% | 0 |
| June 2026 | 26 | 26 | 84.6% | 0 |
| July 2026 | 30 | 29 | 75.9% | 1 |