Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
AS 351 · Dulles (IAD) → Seattle (SEA)
Sold by Alaska. Still flying: 4 of the last 56 days.
Arrives on time79%within 15 minutes, of 275 flights
Cancelled0.7%of scheduled flights
An hour or more late5%of flights that operated
When late, on average51 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport (Seattle is 3 h behind Dulles).
- Leaves IAD
- 06:00
- Arrives SEA
- 08:46
- Flight time
- 5h 46m
- 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 IAD
All flights leaving Dulles (IAD) at 6–7 am, wherever they’re going: 91% left within 15 minutes and 1.2% were cancelled (3,450 flights in the year). Other Alaska flights on this route →
Upcoming forecasts
This flight isn’t in our published forecasts for the next few days.