Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
AS 536 · Seattle (SEA) → Boston (BOS)
Sold by Alaska. Still flying: 49 of the last 56 days (Mon, Tue, Wed, Thu, Fri, Sun).
Arrives on time78%within 15 minutes, of 240 flights
Cancelled0.8%of scheduled flights
An hour or more late2%of flights that operated
When late, on average38 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport (Boston is 3 h ahead of Seattle).
- Leaves SEA
- 23:18
- Arrives BOS
- 07:40
- Flight time
- 5h 22m
- Days flown, last 8 weeks
- 49 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 11 pm–12 am, wherever they’re going: 80% left within 15 minutes and 1.6% were cancelled (8,191 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.