Schedule: a typical Thursday (the flights of Jul 30, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
ALASKA · FLIGHT AS 489SCHEDULED · TYPICAL SCHEDULE
Today
AS 489 · SEA → ONT
departs 8:33 PM PT · arrives 11:11 PM PT
Forecast issued Thu 1:00 AM ET · 23h before departure
Odds over time
Arrive at ONT more than 15 minutes late?
30%chance · ±2 pts+0 pts · 24h
HOW SURE WE AREGood. The odds now lean mostly on firmed-up weather forecasts.
How late will it get to ONT?
On time or early
70%
15–30 min late
18%
30 min–1 hour late
6%
1–2 hours late
3%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.