WN4910
WN4910 (Southwest Airlines) is a multi-stop service on 15 routes, busiest Baltimore to San Diego. Of 214 departures recorded from October 2024 to July 2026, 80.6% left on time, according to the US BTS.
- On-time departures80.6%of 214 flights
- Average delay12.7 min
- July 202618
- Cancelled1.4%
- Legs flown under this number15
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods9 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 27 | 13 | ▼ 51.9% |
| February | 33 | 28 | ▼ 15.2% |
| March | 6 | 3 | ▼ 50.0% |
| April | – | – | – |
| May | – | – | – |
| June | – | 16 | – |
| July | – | 18 | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 1 | – | – |
| 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 periods9 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 84.0% | 83.3% | ▼ 0.8% |
| February | 87.9% | 82.1% | ▼ 6.5% |
| March | 100.0% | 100.0% | 0.0% |
| April | – | – | – |
| May | – | – | – |
| June | – | 43.8% | – |
| July | – | 55.6% | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 100.0% | – | – |
| 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 periods9 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 1 | ▼ 50.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | – | – | – |
| May | – | – | – |
| June | – | 0 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| 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 98.6% 211
- Cancelled 1.4% 3
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BWI SAN Baltimore/Washington International Thurgood Marshall Airport – San Diego International Airport | 3,686 | 5.5 min | 89.8% | 61 |
| SEA SAN Seattle–Tacoma International Airport – San Diego International Airport | 1,692 | 28.8 min | 50.0% | 34 |
| MDW DTW Chicago Midway International Airport – Detroit Metropolitan Wayne County Airport | 367 | 7.0 min | 86.2% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 10 | 10 | 90.0% | 0 |
| November 2024 | 35 | 35 | 85.7% | 0 |
| December 2024 | 24 | 24 | 87.5% | 0 |
| January 2025 | 27 | 25 | 84.0% | 2 |
| February 2025 | 33 | 33 | 87.9% | 0 |
| March 2025 | 6 | 6 | 100.0% | 0 |
| November 2025 | 1 | 1 | 100.0% | 0 |
| January 2026 | 13 | 12 | 83.3% | 1 |
| February 2026 | 28 | 28 | 82.1% | 0 |
| March 2026 | 3 | 3 | 100.0% | 0 |
| June 2026 | 16 | 16 | 43.8% | 0 |
| July 2026 | 18 | 18 | 55.6% | 0 |