WN4778
WN4778 (Southwest Airlines) is a multi-stop service on 18 routes, busiest Atlanta to Baltimore. Of 164 departures recorded from October 2024 to July 2026, 62.5% left on time, according to the US BTS.
- On-time departures62.5%of 164 flights
- Average delay18.1 min
- July 202621▲ 425.0%vs July 2025
- Cancelled2.4%
- Legs flown under this number18
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods14 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 8 | ▲ 700.0% |
| February | – | 17 | – |
| March | 22 | 8 | ▼ 63.6% |
| April | 6 | 1 | ▼ 83.3% |
| May | – | – | – |
| June | 4 | 20 | ▲ 400.0% |
| July | 4 | 21 | ▲ 425.0% |
| August | 1 | – | – |
| September | – | – | – |
| October | 25 | – | in progress |
| November | – | – | – |
| December | 10 | – | – |
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 periods14 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 0.0% | 87.5% | – |
| February | – | 82.4% | – |
| March | 86.4% | 37.5% | ▼ 56.6% |
| April | 80.0% | 100.0% | ▲ 25.0% |
| May | – | – | – |
| June | 75.0% | 30.0% | ▼ 60.0% |
| July | 75.0% | 26.3% | ▼ 64.9% |
| August | 100.0% | – | – |
| September | – | – | – |
| October | 54.2% | – | in progress |
| November | – | – | – |
| December | 60.0% | – | – |
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 periods14 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | – | 0 | – |
| March | 0 | 0 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | – | – | – |
| June | 0 | 0 | – |
| July | 0 | 2 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 1 | – | in progress |
| November | – | – | – |
| 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 97.6% 160
- Cancelled 2.4% 4
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ATL BWI Hartsfield Jackson Atlanta International Airport – Baltimore/Washington International Thurgood Marshall Airport | 928 | 38.5 min | 28.2% | 41 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 10 | 10 | 90.0% | 0 |
| November 2024 | 3 | 3 | 100.0% | 0 |
| December 2024 | 3 | 3 | 100.0% | 0 |
| January 2025 | 1 | 1 | 0.0% | 0 |
| March 2025 | 22 | 22 | 86.4% | 0 |
| April 2025 | 6 | 5 | 80.0% | 1 |
| June 2025 | 4 | 4 | 75.0% | 0 |
| July 2025 | 4 | 4 | 75.0% | 0 |
| August 2025 | 1 | 1 | 100.0% | 0 |
| October 2025 | 25 | 24 | 54.2% | 1 |
| December 2025 | 10 | 10 | 60.0% | 0 |
| January 2026 | 8 | 8 | 87.5% | 0 |
| February 2026 | 17 | 17 | 82.4% | 0 |
| March 2026 | 8 | 8 | 37.5% | 0 |
| April 2026 | 1 | 1 | 100.0% | 0 |
| June 2026 | 20 | 20 | 30.0% | 0 |
| July 2026 | 21 | 19 | 26.3% | 2 |