WN4920
WN4920 (Southwest Airlines) is a multi-stop service on 11 routes, busiest Sacramento to Seattle. Of 171 departures recorded from October 2024 to July 2026, 80.7% left on time, according to the US BTS.
- On-time departures80.7%of 171 flights
- Average delay11.6 min
- July 202639▲ 50.0%vs July 2025
- Cancelled0.0%
- Legs flown under this number11
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods11 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | – | – |
| February | 2 | 7 | ▲ 250.0% |
| March | 1 | 2 | ▲ 100.0% |
| April | – | – | – |
| May | – | – | – |
| June | 22 | 34 | ▲ 54.5% |
| July | 26 | 39 | ▲ 50.0% |
| August | 4 | – | – |
| 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 periods11 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 100.0% | – | – |
| February | 100.0% | 85.7% | ▼ 14.3% |
| March | 0.0% | 50.0% | – |
| April | – | – | – |
| May | – | – | – |
| June | 50.0% | 94.1% | ▲ 88.2% |
| July | 46.2% | 100.0% | ▲ 116.7% |
| August | 75.0% | – | – |
| 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 periods11 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | – | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | – | – | – |
| May | – | – | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| 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 100.0% 171
- Cancelled 0.0% 0
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 |
|---|---|---|---|---|
| SMF SEA Sacramento International Airport – Seattle–Tacoma International Airport | 975 | -0.3 min | 98.3% | 57 |
| SMF SAN Sacramento International Airport – San Diego International Airport | 773 | 29.1 min | 58.8% | 34 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 10 | 10 | 100.0% | 0 |
| November 2024 | 16 | 16 | 87.5% | 0 |
| December 2024 | 6 | 6 | 100.0% | 0 |
| January 2025 | 1 | 1 | 100.0% | 0 |
| February 2025 | 2 | 2 | 100.0% | 0 |
| March 2025 | 1 | 1 | 0.0% | 0 |
| June 2025 | 22 | 22 | 50.0% | 0 |
| July 2025 | 26 | 26 | 46.2% | 0 |
| August 2025 | 4 | 4 | 75.0% | 0 |
| November 2025 | 1 | 1 | 100.0% | 0 |
| February 2026 | 7 | 7 | 85.7% | 0 |
| March 2026 | 2 | 2 | 50.0% | 0 |
| June 2026 | 34 | 34 | 94.1% | 0 |
| July 2026 | 39 | 39 | 100.0% | 0 |