Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
ALASKA · FLIGHT AS 338SCHEDULED · TYPICAL SCHEDULE
Tomorrow
AS 338 · BOS → SEA
departs 9:00 AM ET · arrives 12:23 PM PT
Forecast issued Tue 8:00 PM ET · 13h before departure
Odds over time
Arrive at SEA more than 15 minutes late?
23%chance · ±1 pts+8 pts · 24h
HOW SURE WE AREGood. The odds now lean mostly on firmed-up weather forecasts.
How late will it get to SEA?
On time or early
76%
15–30 min late
14%
30 min–1 hour late
5%
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%.