AS528
AS528 (Alaska Airlines) is a multi-stop service on 4 routes, busiest Seattle to San Francisco. Of 266 departures recorded from November 2024 to July 2026, 60.6% left on time, according to the US BTS.
- On-time departures60.6%of 266 flights
- Average delay21.7 min
- July 202631
- Cancelled0.8%
- Legs flown under this number4
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods16 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 3 | 29 | ▲ 866.7% |
| February | 4 | 22 | ▲ 450.0% |
| March | 5 | 14 | ▲ 180.0% |
| April | 3 | 12 | ▲ 300.0% |
| May | 17 | 28 | ▲ 64.7% |
| June | 11 | 28 | ▲ 154.5% |
| July | – | 31 | – |
| August | – | – | – |
| September | – | – | – |
| October | 6 | – | in progress |
| November | 23 | – | – |
| December | 26 | – | – |
according to the US BTS · November 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 periods16 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 66.7% | 82.8% | ▲ 24.1% |
| February | 75.0% | 68.2% | ▼ 9.1% |
| March | 100.0% | 66.7% | ▼ 33.3% |
| April | 66.7% | 41.7% | ▼ 37.5% |
| May | 64.7% | 39.3% | ▼ 39.3% |
| June | 63.6% | 35.7% | ▼ 43.9% |
| July | – | 58.1% | – |
| August | – | – | – |
| September | – | – | – |
| October | 50.0% | – | in progress |
| November | 69.6% | – | – |
| December | 61.5% | – | – |
according to the US BTS · November 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · November 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods16 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
according to the US BTS · November 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 99.2% 264
- Cancelled 0.8% 2
Share of all recorded flights in the period, all legs. · Nov 23, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SEA SFO Seattle–Tacoma International Airport – San Francisco International Airport | 1,093 | 22.8 min | 58.1% | 219 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| November 2024 | 3 | 3 | 100.0% | 0 |
| December 2024 | 1 | 1 | 100.0% | 0 |
| January 2025 | 3 | 3 | 66.7% | 0 |
| February 2025 | 4 | 4 | 75.0% | 0 |
| March 2025 | 5 | 5 | 100.0% | 0 |
| April 2025 | 3 | 3 | 66.7% | 0 |
| May 2025 | 17 | 17 | 64.7% | 0 |
| June 2025 | 11 | 11 | 63.6% | 0 |
| October 2025 | 6 | 6 | 50.0% | 0 |
| November 2025 | 23 | 23 | 69.6% | 0 |
| December 2025 | 26 | 26 | 61.5% | 0 |
| January 2026 | 29 | 29 | 82.8% | 0 |
| February 2026 | 22 | 22 | 68.2% | 0 |
| March 2026 | 14 | 12 | 66.7% | 2 |
| April 2026 | 12 | 12 | 41.7% | 0 |
| May 2026 | 28 | 28 | 39.3% | 0 |
| June 2026 | 28 | 28 | 35.7% | 0 |
| July 2026 | 31 | 31 | 58.1% | 0 |