Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
AS 427 · Portland (PDX) → Seattle (SEA)
Sold by Alaska. Still flying: 51 of the last 56 days (Daily).
Arrives on time48%within 15 minutes, of 51 flights
Cancelled2.0%of scheduled flights
An hour or more late8%of flights that operated
When late, on average63 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport.
- Leaves PDX
- 09:19
- Arrives SEA
- 10:21
- Flight time
- 1h 02m
- Days flown, last 8 weeks
- 51 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 PDX
All flights leaving Portland (PDX) at 9–10 am, wherever they’re going: 88% left within 15 minutes and 1.0% were cancelled (1,974 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.