Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
AS 737 · Dulles (IAD) → Seattle (SEA)
Sold by Alaska. Still flying: 55 of the last 56 days (Daily).
Arrives on time58%within 15 minutes, of 129 flights
Cancelled1.6%of scheduled flights
An hour or more late12%of flights that operated
When late, on average55 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
- 18:14
- Arrives SEA
- 21:09
- Flight time
- 5h 55m
- Days flown, last 8 weeks
- 55 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 pm, wherever they’re going: 73% left within 15 minutes and 1.8% were cancelled (3,320 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.