WN4821
WN4821 (Southwest Airlines) is a multi-stop service on 13 routes, busiest Burbank to Oakland. Of 222 departures recorded from October 2024 to July 2026, 82.6% left on time, according to the US BTS.
- On-time departures82.6%of 222 flights
- Average delay8.9 min
- July 202631
- Cancelled1.8%
- Legs flown under this number13
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods12 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 27 | 3 | ▼ 88.9% |
| February | 28 | 11 | ▼ 60.7% |
| March | 5 | 5 | 0.0% |
| April | – | 1 | – |
| May | – | – | – |
| June | – | 26 | – |
| July | – | 31 | – |
| August | – | – | – |
| September | – | – | – |
| October | 26 | – | 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 periods12 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 92.3% | 66.7% | ▼ 27.8% |
| February | 71.4% | 90.9% | ▲ 27.3% |
| March | 80.0% | 80.0% | 0.0% |
| April | – | 100.0% | – |
| May | – | – | – |
| June | – | 84.0% | – |
| July | – | 93.6% | – |
| August | – | – | – |
| September | – | – | – |
| October | 92.3% | – | in progress |
| November | 66.7% | – | – |
| December | 9.1% | – | – |
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 periods12 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | – | 0 | – |
| May | – | – | – |
| June | – | 1 | – |
| July | – | 0 | – |
| 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 98.2% 218
- Cancelled 1.8% 4
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
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BUR OAK Hollywood Burbank/Bob Hope Airport – Oakland San Francisco Bay Airport | 523 | 4.0 min | 85.7% | 87 |
| BWI PVD Baltimore/Washington International Thurgood Marshall Airport – Rhode Island T. F. Green International Airport | 526 | 3.5 min | 89.3% | 57 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 13 | 13 | 84.6% | 0 |
| November 2024 | 13 | 12 | 91.7% | 1 |
| December 2024 | 16 | 15 | 93.3% | 1 |
| January 2025 | 27 | 26 | 92.3% | 1 |
| February 2025 | 28 | 28 | 71.4% | 0 |
| March 2025 | 5 | 5 | 80.0% | 0 |
| October 2025 | 26 | 26 | 92.3% | 0 |
| November 2025 | 6 | 6 | 66.7% | 0 |
| December 2025 | 11 | 11 | 9.1% | 0 |
| January 2026 | 3 | 3 | 66.7% | 0 |
| February 2026 | 11 | 11 | 90.9% | 0 |
| March 2026 | 5 | 5 | 80.0% | 0 |
| April 2026 | 1 | 1 | 100.0% | 0 |
| June 2026 | 26 | 25 | 84.0% | 1 |
| July 2026 | 31 | 31 | 93.6% | 0 |