Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
AS 618 · St Louis (STL) → Seattle (SEA)
Sold by Alaska. Still flying: 56 of the last 56 days (Daily).
Arrives on time87%within 15 minutes, of 111 flights
Cancelled0.9%of scheduled flights
An hour or more late5%of flights that operated
When late, on average84 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport (Seattle is 2 h behind St Louis).
- Leaves STL
- 14:50
- Arrives SEA
- 17:17
- Flight time
- 4h 27m
- Days flown, last 8 weeks
- 56 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 STL
All flights leaving St Louis (STL) at 2–3 pm, wherever they’re going: 71% left within 15 minutes and 1.2% were cancelled (3,884 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.