Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
ALASKA · FLIGHT AS 620SCHEDULED · TYPICAL SCHEDULE
AS 620 · SFO → SEA
departs 6:03 AM PT · arrives 8:13 AM PT
Forecast issued Fri 3:00 PM ET · 42h before departure
Odds over time
Arrive at SEA more than 15 minutes late?
13%chance · ±1 pts+0 pts · 24h
HOW SURE WE AREModerate. The odds now blend history with early weather forecasts.
How late will it get to SEA?
On time or early
87%
15–30 min late
7%
30 min–1 hour late
3%
1–2 hours late
2%
Over 2 hours late
<1%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.