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 637 LANDED 2:50 PM PT, ~22 MIN LATE · SCHEDULED TIME UNKNOWN
Today

AS 637 · PHX → SEA

took off 12:16 PM MT · landed 2:50 PM PT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 6h after departure

Odds over time

Arrive at SEA more than 15 minutes late?
43% chance · ±0 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% 25% 50% 75% 100% 2.9d 2d 1d 12h 6h Departs Lands