Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
AS 521 · Seattle (SEA) → San Jose (SJC)
Sold by Alaska. Still flying: 4 of the last 56 days.
Arrives on time87%within 15 minutes, of 184 flights
Cancelled1.1%of scheduled flights
An hour or more late4%of flights that operated
When late, on average58 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport.
- Leaves SEA
- 14:54
- Arrives SJC
- 17:06
- Flight time
- 2h 12m
- Days flown, last 8 weeks
- 4 of 56
Each square is a day, Sat Jun 6 to Fri Jul 31, two weeks per row (each column is the same weekday); filled = flew.
How late it arrives
Share of flights that operated arriving more than this late.
Horizontal: minutes late at arrival (0 to 3 hours). Vertical: share of flights later than that.
Its hour at SEA
All flights leaving Seattle (SEA) at 2–3 pm, wherever they’re going: 79% left within 15 minutes and 1.0% were cancelled (6,890 flights in the year). Other Alaska flights on this route →
Upcoming forecasts
Our odds that this flight is late or cancelled on the days we publish.