Tracked live by the FAA, but its flight plan was first seen after takeoff, so we don't know the scheduled time and can't say whether it's late.

ALASKA · FLIGHT AS 621 LANDED 2:57 PM PT, ~7 MIN LATE · SCHEDULED TIME UNKNOWN
Today

AS 621 · SEA → SAN

took off 12:48 PM PT · landed 2:57 PM PT (scheduled time unknown)
Forecast issued Tue 5:00 PM ET · 1h after departure

Odds over time

Arrive at SAN more than 15 minutes late?
37% chance · ±1 pts −4 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 15% 30% 45% 60% 1.0d 12h 6h Departs Now Lands